GB1594171A - Method of stabilizing the cutting level of mowing appliances in mowing and suspension means for performing the method - Google Patents

Method of stabilizing the cutting level of mowing appliances in mowing and suspension means for performing the method Download PDF

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Publication number
GB1594171A
GB1594171A GB9048/78A GB904878A GB1594171A GB 1594171 A GB1594171 A GB 1594171A GB 9048/78 A GB9048/78 A GB 9048/78A GB 904878 A GB904878 A GB 904878A GB 1594171 A GB1594171 A GB 1594171A
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United Kingdom
Prior art keywords
limb
bar
mowing
welded
appliance
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Expired
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GB9048/78A
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Busatis Werke GmbH and Co KG
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Busatis Werke GmbH and Co KG
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Publication of GB1594171A publication Critical patent/GB1594171A/en
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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/02Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having reciprocating cutters
    • A01D34/03Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having reciprocating cutters mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/02Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having reciprocating cutters
    • A01D34/28Adjusting devices for the cutter-bar

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Harvester Elements (AREA)
  • Binders And Loading Units For Sheaves (AREA)

Description

(54) A METHOD OF STABILIZING THE CUTTING LEVEL OF MOWING APPLIANCES IN MOWING AND SUSPENSION MEANS FOR PERFORMING THE METHOD (71) We, BUSATIS-WERKE KG, of Kolner Strasse 61, 5630 Remscheid 11, Germany, a Kommandigesellschaft, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to a method of stabilzing the cutting level of a mowing appliance during mowing and a suspension means for a mowing appliance to be mounted upon a working machine. Such a means may comprise a lateral suspension device for frontal mowers, which are releasably mounted upon the frame or the like at the front of a biaxial working machine.
As is well known, mowing appliances can be mounted, usually releasably, as lateral mowers upon a mono- or poly-axial (axle) working machine. A distinction is drawn, according to positioning, between frontal inter-axial (axle) and rear mowers. Further, the mowing appliance may be fixedly or detachably mounted as a frontal mower upon the working machine.
In order to compensate for minor unevennesses of the ground, as well as tilting movements about a longitudinal axis of the working machine, the cutting means is as a rule mounted hingedly slewable about a horizontal shaft ranged athwart the longitudinal axis of the cutter bar upon the inner shoe of the mower. If the mower passes over an obstacle, for instance over a molehill, the cutting means can move away upwards. On the other hand, the cutting means can maintain its position relatively to the ground if the working machine executes a tipping movement about its longitudinal axis, caused e.g. by a small pool. Otherwise, however, the suspension is rigid, so that unevennesses cannot be tackled e.g. by the inner shoes.
Considerable forces are, therefore, transmitted from it to the suspension means if the shoe encounters an obstacle. Unlike the lateral mowing appliances, frontal mowers have as a rule a completely rigid suspension.
The cutting level of a mowing appliance is adjustable in many cases. The adjustability allows the angle of inclination of the cutters to the ground to be varied and ensures optimal cutting action for the material that is to be cut.
Consequently, the cutting level should stay as far as possible unchanged during mowing. This is not ensured in the conventional suspension devices, as the cutting level varies uncontrollably in the case of tilting movement of the working machine about the transverse axis, as well as the frontal or rear axis e.g. as a result of unevennesses of the ground. This may cause the cutters or the outer shoe at the end of the cutter bar to enter the ground and so cause the suspension means to break. For this reason, the cutting level is often so preselected on uneven ground that the angle of inclination is set greater than necessary. Moreover, it is sought to eschew the breakage of the cutters or of the suspension means by an overload protection device which enables the whole cutting appliance to be slewed away rearwards should the cutters encounter a rigid obstacle. These ancillary steps do not, however, provide a satisfactory solution.
According to one aspect of the invention, there is provided a method of stabilizing the cutting level of a frontal mowing appliance during mowing, in which cutting means is suspended laterally at one side and is guided in the suspended state in a parallel manner by way of a parallelogram guide so as to be pivotable up and down, the cutter means being mounted on the side of the parallelogram guide so as to be pivotable up and down about a longitudinal axis of the cutting menas.
A preferred method allows the mowing appliance to cooperate with a suspension device during the mowing so that a preset cutting level is substantially maintained regardless of the tilting movements of the working machine, more particularly about a transverse axis, and so that the mowing appliance can follow the unevennesses of the ground in the best possible way.
A preferred method allows parallel guiding of the cutting means during the mowing when the working machine is tipped about a transverse axis, as well as when forces act upon the cutting means from below.
The parallelogram guide means enables the mowing appliance to compensate for vertical unevennesses of the ground, the mowing appliance moving up and down, or following the irregularities of the ground, without any change in the mowing level. The same happens if the working machine carries out tilting movements and the mowing appliance is in contact with the ground. The tilting movements are absorbed by the articulatedly mounted parallel gram guide means without being transmitted to the mowing appliance. If the parallelogram guide is combined with a laterally slewable hinged mounting of the cutting means, which is known as such, nearly all tilting movements of the working machine can be compensated. In addition, the mowing appliance itself can compensate for the unevennesses if the working machine carries out tilting movements. During this, the suspension device need not be exposed to any additional loads. On the contrary, it need only sustain substantially the weight of the mowing appliance and the stresses arising from the cutting.
According to another aspect of the invention, there is provided a suspension means for a mowing appliance, comprising a carrier bracket for attachment to a tractor and a support means connected to the carrier bracket and to an articulatedly mounted parallelogram guide means for mounting the mowing appliance.
It is particularly advantageous to place the parallelogram guide means between the carrier bracket and the mowing appliance. In a special form of embodiment of the invention, the suspension means carries a frontal mowing appliance said mowing appliance being suspended on one side, and the cutting means being preferably mounted to be hingedly slewable about a horizontal shaft ranged athwart the longitudinal axis of the cutter bar, in a way known as such, upon the inner shoe. It is of further advantage if a limb of the parallelogram guide means is equipped with an overload protection means, which is known as such.
In a further advantageous embodiment of the invention it is envisaged to make the carrier bracket of the suspension means laterally movable upon an attachment frame, while the frame may be made vertically adjustable on the working machine.
The invention will be further described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a sketch illustrating a preferred suspension means; Figure 2 is a side elevation of the means of Figure 1; Figure 3 is a front elevation of the means of Figure 1; Figures 4a, b and c show a carrier bracket in front elevation, plan view and side elevation, respectively; and Figures Sa and b show an overload protection means in side elevation and plan view, respectively.
A preferred suspension means carries a mowing appliance 1. The mowing appliance 1 is a commercially available lateral mowing appliance with an inner shoe 2, whereupon a driving motor 3, preferably an hydrauluc motor, for cutting means 4 is mounted. The cutting means 4 can be slewed up and down about a shaft 5. The mowing appliance, which is known as such, is used as a frontal mowing appliance with lateral suspension. This arrangement requires few individual parts, so that the mowing appliance with the suspension means is relatively light. The lateral suspension brings the considerable advantage that commercially available mowing appliances can be used and even mounted as frontal appliances.
The suspension means comprises a parallelogram guide means 6, a carrier bracket 7 and a support means 59. The carrier bracket 7 is of "L" shape and has a horizontal limb 8 and the vertical limb 9. The carrier bracket is secured by the horizontal limb 8 to an attachment frame 11 of the support means 59, which is connectable to a working machine such as a tractor.
The parallelogram guide means 6 comprises an upper guide bar 12, a lower guide bar 13, and a bar carrier 14. The two guide bars are articulated at their front end in spaced relationship upon the bar carrier 14 by means of shafts 15 and 16 as pivot connections. The upper guide bar 12 is rotatably mounted at its rear end by a shaft 17 upon the vertical lumb 9 of the carrier bracket 7, and the lower guide bar 13 is similarly mounted at its rear end by bearings 20 and 21 upon the horizontal limb 8 on bearing pins 18 and 19. The shafts 15, 16, and 17, as well as the bearing pins 18, 19 as seen spatially from the side lie at the apices of a parallelogram. The shaft 17 and the bearing pins 18 and 19 form the spatially fixed pivots of the parallelogram guide means, while the spatial position of the shafts 15, 16 is displaceable in parallel. The main load is carried by the bearing pins 18 and 19.
The mowing appliance is rigidly fixed to the lower end 22 of the bar carrier 14. For this purpose, the end 22 is welded to a hinge bridge 23, known as such, of the mowing appliance.
Hinge arms 24 of the hinge bridge, which point downwards, carry and mount in a way known as such the mowing appliance and the cutting means respectively.
The cutting level is enforced by the parallelogram guide means inasmuch as the cutting level remains unchanged when the mowing appliance is raised or lowered. This is illustrated in Figure 2 by the position of the parallelogram guide means with the mowing appliance indicated by dashed lines.
The lower guide bar 13 may preferably be bent downwards at its frontal end portion. The bend 24a is formed by a linking limb 25 and an attachment fork 26, which is angled, grips over the bar carrier 14 at its front end, and is secured thereto by the shaft 16. The bend 24a is useful because it provides additional space for the hinge bridge when the mowing appliance is raised into the transport position, so that the mowing appliance can be pulled up higher without its movement being prematurely restricted by the hinge bridge coming up against the guide bar 13. This too is clarified in Figure 2 by the dashed illustration of the transport position of the mowing appliance.
The attachment means of the shaft 17 are made releasable and adjustable for presetting the cutting level. For this purpose, the shaft 17 may preferably be horizontally displaced.
In the illustrated example, this is achieved by providing for the attachment of the rear end of the upper guide bar 12 on the end part of the vertical limb 9 a fish plate 27 which is horizontally directed forward, each limb of said fish plate having a plurality of equal bore pairs 28 facing each other. In this fish plate 27, the upper guide bar 12 is pivoted by the shaft 17 passing through a pair of the bores 28. The positioning of the shaft 17 in a leading or following pair of bores results in a variable inclination, transmitted through the parallelogram guide means, of the cutters of the mowing appliance to the ground. The number of the bore pairs 28 may be varied as desired. It will be understood that other means of adjustment for the position of the shaft may be used, and it is also possible to provide a similar attachment for the other shafts (pivots) of the parallelogram guide means.
Since the bearings pins 18 and 19 have to transmit the main load of the suspension, as well as take up torques in the axial direction, their spacing is made particularly wide, amounting to a third or a fourth of the entire length of the horizontal limb 8. At the same time this gains space for mounting further suspension elements. This mounting of the lower guide bar 13 is, therefore, made especially stable. It consists essentially of a channel section 29 with a base web 63, to which the lower guide bar 13 is welded on flat. To the left side of the channel section there is welded a tubular segment 64 which acts as the bearing 20. On the right side, the function of the bearing 21 is performed by a lever 32 with a bore, through which the pin 1 8 is passed. The lever 32 is welded by its shorte: arm 38 to the lower guide bar and likewise united by a weld joint with the right end of the channel section.
As in the case of a known suspension device in which a lifting means actionable from the working machine is provided as a rule, so too is such a means arranged upon the suspension means. This is adjusted to the new system and is functionless without the parallelogram guide means. Lifting means 30 comprises a pistoncylinder system 31 and the lever 32. The pistoncylinder system 31 operates hydraulically and is connected to the hydraulic system of the working machine. The cylinder 34 is slewably mounted by means of a ring support 33 externally on the side of the vertical limb 9 of the carrier bracket 7, and the piston rod 35 is articulated on the rear plate 36 of the fish plate of the large arm 37 of the lever 32. The lever 32 is pivoted, preferably somewhat eccentrically upon the outside end of the bearing pin 18 and is secured there by suitable means. The shorter arm 38 of the lever 32 is rigidly joined to the rear end of the lower guide bar 13. Owing to this arrangement, the travel on the piston in the piston-cylinder system 31 can be transmitted through the lever 32 to the parallelogram guide means 6. Thus, when the piston comes out the mowing appliance is lifted. In order to prevent the cutting means 4, which is mounted rotatably about the shaft 5, being tipped downwards and thus making it impossible to transport, a cable suspension 39 is provided, as part of the suspension means. The cable suspension 39 comprises a cable 42, which is fixed upon the horizontal limb 8 between and below the bearing pins 18 and 19 in a fork 40 and to a cutter beam 41 close to the inner shoe 2, the cable being passed over a roller 43, which is rotatably mounted upon a rod 44 fixed on to the side of the bar (beam) carrier 14. The cable 42 is secured to the fork 40 so that it can be shortened or lengthened. The length of the cable is so chosen that the cutting means can be slewed downwards from its normal horizontal position by about 10 to 150, to enable it to follow lateral slopes of the ground. If the mowing appliance is raised the roller guide acts upon the cable as a fixed counter-bearing once the cable is drawn taut, a tension being transmitted to the cable, whose further effect is to tip high up the cutting means adapted to swing about the shaft 5. The tipped position depends on the height by which the mowing appliance is raised.
In this way, the mowing appliance can be so upraised by the hydraulic system of the working machine and the lifting means 30 that any obstacle can be avoided by raising the mowing appliance and the mowing appliance can be brought into the transport position in an uncomplicated way. For locking the mowing appliance in the transport position there are provided the usual locking elements, which have been previously described and are not illustrated. There are also available support elements, which are not shown and which support the carrier bracket when the mowing appliance is removed from the working machine.
The suspension device may further be advantageously equipped with an overload protection means 45, which comes into action if the mowing appliance encounters a rigid obstacle. The overload protection means is so designed as to be readily coupled to the coupling system of the working machine and to enable the working machine to be automatically uncoupled. The overload protection means operates by a system known as such. Its arrange ment, however, is such that it advantageously co-operates with the parallelogram guide means.
For this reason it is mounted upon the upper guide bar 12, which is made in two parts and consists of a rear shank 46 and a front shank 47. The two shanks are successively aligned and inter-connected by a bar 48, which is welded on the side to the front shank, and to the rear end of the said bar 48 is welded a clamp 49 which positvely grips round the rear shank 46.
In this way, the shanks can slide away from each other. For stopping the shanks there is provided a pressure system 50, which is welded on to the rear shank near its front end. This is a device that is known as such with a springloaded pin which engages a wedge-shaped recess 64 in the rear shank 46. The mode of operation is generally known and will not be particularly explained.
In a further embodiment of the invention, the suspension device is combined with a support means 59 of especially advantageous design intended for the parallelogram guide means.
This support means allows the suspension device to be moved sideways and up and down to make the best possible way. Said support means consists essentially of the frame 11, which is formed by two successive channel bars 60 and 61, which are connected with two fish plates 62, the front channel bar 60 having a top limb 51, a bottom limb 52 and a rear limb 53. A guide ledge 54 is welded as a baffle sheet to the bottom limb 52.
The baffle sheet facilitates the threading of the carrier bracket into the frame 11. Elongated apertures 58 are formed in the rear limb 53, and slit pins 55, which are welded backwards on the horizontal limb 8, preferably formed as a tubular brace, are passed through said apertures. The pins are jammed with wedges 56 against the back wall of the rear limb 53, the slit walls 57 of the pin 55 fitting the angle of the wedge 56. The wedge joint provides an especially firm anchorage for the suspension means on the frame 11. The elongated apertures 58 make possible movement of the carrier bracket sideways with the parallelogram guide means and thus the lateral adjustment to the constructionally determined degree of freedom of the parallelogram guide means in respect of different makes of working machines. Two eagle irons 65 are welded on to the bottom limb 66 of the channel bar 61 for vertical adjustability.
The angle irons 65 are fixed by screws to a cross limb 67 of a T bar 68, its long limb 69 being connectable to the working machine.
The support means 59 is marked out in particular by its easy detachability, which makes for the quick mounting and dismounting of the suspension means. It involves few parts and yet ensures, owing to the wedge joint of the carrier bracket, a secure attachment of the suspension means during mowing. It has proved that the wedge joint does not give way under vibration.
WHAT WE CLAIM IS: 1. A method of stabilizing the cutting level of a frontal mowing appliance during mowing, in which cutting means is suspended laterally at one side and is guided in the suspended state in a parallel manner by way of a parallelogram guide so as to be pivotable up and down, the cutter means being mounted on the side of the parallelogram guide so as to be pivotable up and down about a longitudinal axis of the cutting means.
2. A suspension means for a mowing appliance comprising a carrier bracket for attachment to a tractor and a support means connected to the carrier bracket and to an articulatedly mounted parallelogram guide means for mounting the mowing appliance.
3. A means as claimed in claim 2, in which the parallelogram guide means is located between the carrier bracket and the mowing appliance.
4. A means as claimed in claim 2 or 3, in which the parallelogram guide means is connected to a frontal mowing appliance, the mowing appliance being laterally suspended at one side.
5. A means as claimed in claim 4, in which the cutting means of the mowing appliance is mounted in a way known as such to be hingedly slewable about a horizontally disposed shaft provided on an inner shoe of the mowing appliance at right angles to the longitudinal axis of a cutter beam (bar).
6. A means as claimed in any one of claims 2 to 5, in which a limb of the parallelogram guide means is equipped with an overload protection device, which is known as such.
7. A means as claimed in any one of claims 2 to 6, in which the carrier bracket is mounted upon an attachment frame in a laterally slidable manner and the frame is vertically adjustable on the working machine.
8. A means as claimed in claim 7, in which the carrier bracket has an L shape and comprises a horizontal limb and a vertical limb, and is secured to the attachment frame of the support means with its horizontal limb.
9. A means as claimed in any one of claims 2 to 8, in which the parallelogram guide means comprises an upper guide bar, a lower guide bar and a bar carrier, the two guide bars being pivoted at their front ends upon the bar carrier in spaced relationship by shafts in the form of bolt joints, the upper guide bar being pivoted at its rear end by a shaft upon the vertical limb of the carrier bracket, and the lower guide bar being rotatably mounted by bearings upon bearing pins on the horizontal limb.
10. A means as claimed in claim 9, in which the shafts and the bearing pins lie at the apices of a parallelogram.
11. A means as claimed in any one of claims 2 to 10, in which the mowing appliance is rigidly connected to the lower end of the beam (bar) carrier.
12. A means as claimed in any one of claims 2 to 11, in which the lower guide bar has a bend in its frontal end part.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (23)

**WARNING** start of CLMS field may overlap end of DESC **. co-operates with the parallelogram guide means. For this reason it is mounted upon the upper guide bar 12, which is made in two parts and consists of a rear shank 46 and a front shank 47. The two shanks are successively aligned and inter-connected by a bar 48, which is welded on the side to the front shank, and to the rear end of the said bar 48 is welded a clamp 49 which positvely grips round the rear shank 46. In this way, the shanks can slide away from each other. For stopping the shanks there is provided a pressure system 50, which is welded on to the rear shank near its front end. This is a device that is known as such with a springloaded pin which engages a wedge-shaped recess 64 in the rear shank 46. The mode of operation is generally known and will not be particularly explained. In a further embodiment of the invention, the suspension device is combined with a support means 59 of especially advantageous design intended for the parallelogram guide means. This support means allows the suspension device to be moved sideways and up and down to make the best possible way. Said support means consists essentially of the frame 11, which is formed by two successive channel bars 60 and 61, which are connected with two fish plates 62, the front channel bar 60 having a top limb 51, a bottom limb 52 and a rear limb 53. A guide ledge 54 is welded as a baffle sheet to the bottom limb 52. The baffle sheet facilitates the threading of the carrier bracket into the frame 11. Elongated apertures 58 are formed in the rear limb 53, and slit pins 55, which are welded backwards on the horizontal limb 8, preferably formed as a tubular brace, are passed through said apertures. The pins are jammed with wedges 56 against the back wall of the rear limb 53, the slit walls 57 of the pin 55 fitting the angle of the wedge 56. The wedge joint provides an especially firm anchorage for the suspension means on the frame 11. The elongated apertures 58 make possible movement of the carrier bracket sideways with the parallelogram guide means and thus the lateral adjustment to the constructionally determined degree of freedom of the parallelogram guide means in respect of different makes of working machines. Two eagle irons 65 are welded on to the bottom limb 66 of the channel bar 61 for vertical adjustability. The angle irons 65 are fixed by screws to a cross limb 67 of a T bar 68, its long limb 69 being connectable to the working machine. The support means 59 is marked out in particular by its easy detachability, which makes for the quick mounting and dismounting of the suspension means. It involves few parts and yet ensures, owing to the wedge joint of the carrier bracket, a secure attachment of the suspension means during mowing. It has proved that the wedge joint does not give way under vibration. WHAT WE CLAIM IS:
1. A method of stabilizing the cutting level of a frontal mowing appliance during mowing, in which cutting means is suspended laterally at one side and is guided in the suspended state in a parallel manner by way of a parallelogram guide so as to be pivotable up and down, the cutter means being mounted on the side of the parallelogram guide so as to be pivotable up and down about a longitudinal axis of the cutting means.
2. A suspension means for a mowing appliance comprising a carrier bracket for attachment to a tractor and a support means connected to the carrier bracket and to an articulatedly mounted parallelogram guide means for mounting the mowing appliance.
3. A means as claimed in claim 2, in which the parallelogram guide means is located between the carrier bracket and the mowing appliance.
4. A means as claimed in claim 2 or 3, in which the parallelogram guide means is connected to a frontal mowing appliance, the mowing appliance being laterally suspended at one side.
5. A means as claimed in claim 4, in which the cutting means of the mowing appliance is mounted in a way known as such to be hingedly slewable about a horizontally disposed shaft provided on an inner shoe of the mowing appliance at right angles to the longitudinal axis of a cutter beam (bar).
6. A means as claimed in any one of claims 2 to 5, in which a limb of the parallelogram guide means is equipped with an overload protection device, which is known as such.
7. A means as claimed in any one of claims 2 to 6, in which the carrier bracket is mounted upon an attachment frame in a laterally slidable manner and the frame is vertically adjustable on the working machine.
8. A means as claimed in claim 7, in which the carrier bracket has an L shape and comprises a horizontal limb and a vertical limb, and is secured to the attachment frame of the support means with its horizontal limb.
9. A means as claimed in any one of claims 2 to 8, in which the parallelogram guide means comprises an upper guide bar, a lower guide bar and a bar carrier, the two guide bars being pivoted at their front ends upon the bar carrier in spaced relationship by shafts in the form of bolt joints, the upper guide bar being pivoted at its rear end by a shaft upon the vertical limb of the carrier bracket, and the lower guide bar being rotatably mounted by bearings upon bearing pins on the horizontal limb.
10. A means as claimed in claim 9, in which the shafts and the bearing pins lie at the apices of a parallelogram.
11. A means as claimed in any one of claims 2 to 10, in which the mowing appliance is rigidly connected to the lower end of the beam (bar) carrier.
12. A means as claimed in any one of claims 2 to 11, in which the lower guide bar has a bend in its frontal end part.
13. A means as claimed in claim 9 or 10,
in which for presetting the cutting level the shaft connecting the upper guide bar to the vertical limb of the carrier bracket is horizontally movable.
14. A means as claimed in claim 13, in which for attaching the rear end of the upper guide bar to the upper terminal part of the vertical limb there is provided a forwardly projecting fish plate having two members, each member of the fish plate having a plurality of paired bores which face each other and are of equal size, the upper guide bar pivoting in the fish plate upon its shaft which passes through a pair of the said bores.
15. A means as claimed in any one of claims 9, 10, 13, and 14, in which the spacing of the bearing pins is between a third and a quarter of the total length of the horizontal limb.
16. A means as claimed in any one of claims 9, 10, 13, 14, and 15, including a lifting means, consisting of a piston-cylinder system and a lever, the cylinder of the piston-cylinder system being slewably mounted in a holding ring on the outer side of a vertical limb of the carrier bracket, and the piston rod being articulated on the rear member of the fish plate of the longer arm of the lever, the lever being rotatably and eccentrically mounted on the outer end of the bearing pin and retained by it, and the shorter arm of the lever being rigidly united with the rear end of the lower guide bar.
17. A means as claimed in any one of claims 9 to 16, including a cable suspension, consisting of a cable fixed to the horizontal limb between and below the bearing pins in a fork and to the cutter beam in the vicinity of the inner shoe, said cable being passed over a roller, which is rotatably mounted upon a pin fixed to the side of the bar carrier.
18. A means as claimed in any one of claims 2 to 17, including an overload protection means, which is mounted upon the upper guide bar.
19. A means as claimed in claim 18, in which the overload protection means consists of a rear shank and a front shank, the two shanks being successively aligned and connected to each other by a bar which is welded on to a side of the front shank, a clamp being welded to the rear end of said bar and positively gripping round the rear shank.
20. A means as claimed in any one of claims 2 to 19, including a support means consisting of a frame formed by two successive channel bars which are connected to two fish plates, the front channel bar having a top limb, a bottom limb and a rear limb, a guide ledge being welded to the bottom limb and elongated apertures being formed in the rear limb, there being provided split pins which are welded backwards on to the horizontal limb, passed through said apertures, and jammed with wedges against the rear wall of the rear limb, the slit walls of the pins fitting the angle of the wedge.
21. A means as claimed in claim 20, in which for vertical adjustability two angle irons are welded to the bottom limb of the channel bar, the angle irons being fixed with screws to the cross limb of a T-bar, whose long limb is arranged to be connected to the working machine.
22. A suspension means for a mowing appliance, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
23. A working machine on which is mounted a means as claimed in any one of claims 2 to 22.
GB9048/78A 1977-03-07 1978-03-07 Method of stabilizing the cutting level of mowing appliances in mowing and suspension means for performing the method Expired GB1594171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772709798 DE2709798A1 (en) 1977-03-07 1977-03-07 METHOD FOR STABILIZING THE KNIFE STAND OF MAWING PLANTS DURING MAWING AND HANGING DEVICE FOR PERFORMING THE METHOD

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GB1594171A true GB1594171A (en) 1981-07-30

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GB9048/78A Expired GB1594171A (en) 1977-03-07 1978-03-07 Method of stabilizing the cutting level of mowing appliances in mowing and suspension means for performing the method

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JP (1) JPS53112126A (en)
DE (1) DE2709798A1 (en)
ES (1) ES467615A1 (en)
FR (1) FR2382839A1 (en)
GB (1) GB1594171A (en)
IT (1) IT7848302A0 (en)
NL (1) NL7802071A (en)
SE (1) SE7802525L (en)

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GB2206472A (en) * 1987-07-04 1989-01-11 Econ Group Ltd Improvements relating to mower/hedger assemblies
GB2330512A (en) * 1997-10-24 1999-04-28 Ransomes America Corp Raising/lowering mechanism for cutting head of greens mower.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56501264A (en) * 1979-10-09 1981-09-03
DE3106929C2 (en) * 1981-02-25 1985-12-05 Busatis-Werke GmbH u. Co KG, 5630 Remscheid Mounted front mower with reciprocating mower blades
DE3430330C2 (en) * 1984-08-17 1986-12-04 Manfred 8851 Tagmersheim Mayr Attachment device for attaching a front mower to an agricultural machine
FR2614755A1 (en) * 1987-05-04 1988-11-10 Kuhn Sa Mowing machine fitted with a device for adjusting the cutting height of the cutting member
JP5458949B2 (en) * 2010-02-25 2014-04-02 井関農機株式会社 Work vehicle
JP5459008B2 (en) * 2010-03-25 2014-04-02 井関農機株式会社 Passenger work vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2120671A (en) * 1936-08-17 1938-06-14 Jensen William Mowing machine attachment for tractors
CH284732A (en) * 1950-06-09 1952-08-15 Daimler Benz Ag Vehicle with mowing device attached to the front of the vehicle.
DE1582491A1 (en) * 1966-05-07 1970-07-16 Ernst Weichel Front mower
DE1507421A1 (en) * 1966-05-07 1969-12-18 Ernst Weichel Front mower for agricultural tractors
DE1582490A1 (en) * 1967-03-02 1970-07-23 Ernst Weichel Front mower
DE1757480A1 (en) * 1968-05-14 1971-04-22 Fahr Ag Maschf Agricultural vehicle with device for coupling attachments
DE2652736A1 (en) * 1976-11-19 1977-12-01 Ernst Weichel FRONT MOWERS FOR AGRICULTURAL VEHICLES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206472A (en) * 1987-07-04 1989-01-11 Econ Group Ltd Improvements relating to mower/hedger assemblies
GB2206472B (en) * 1987-07-04 1991-04-17 Econ Group Ltd Improvements relating to excavator vehicle and mower/hedge apparatus combinations
GB2330512A (en) * 1997-10-24 1999-04-28 Ransomes America Corp Raising/lowering mechanism for cutting head of greens mower.
GB2330512B (en) * 1997-10-24 2002-07-10 Ransomes America Corp Levelling aparatus for a cutting head of a mower

Also Published As

Publication number Publication date
ES467615A1 (en) 1979-06-16
DE2709798A1 (en) 1978-09-14
JPS53112126A (en) 1978-09-30
FR2382839A1 (en) 1978-10-06
NL7802071A (en) 1978-09-11
SE7802525L (en) 1978-09-08
IT7848302A0 (en) 1978-03-06

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PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee