AT523600A2 - Mower arrangement - Google Patents

Abstract

The invention relates to a mower arrangement for attachment to a carrier vehicle with a frame (6) on which at least two mower bars (4.2, 4.3) are pivotably arranged from an essentially horizontal working position into a transport position about a pivot axis (S). The cutter bars (4.2, 4.3) are arranged crossed to one another in their transport position.

Description

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Attorney's file 21046 02/16/2021

Mower arrangement

The invention relates to a mower arrangement for mounting on a carrier vehicle with a frame on which at least two cutter bars from a substantially horizontal working position into a transport position by one

Pivot axis are pivotably arranged

The basic structure of mower arrangements or mower combinations for mowing an area is known. These can be provided either as attachments for attachment to an agricultural carrier vehicle or as part of a self-propelled agricultural harvesting machine.

Mower arrangements of the type considered here have three mower units. Variants are known in which one of the mower units is designed as a front mower and the remaining two mower units are formed by lateral mowers. The lateral mowers are either mounted on the rear of the agricultural carrier vehicle via at least one mounting frame or via a common structure to form one

Mower arrangement summarized.

The type of mower is, in particular, a double-knife mower. Such mowers comprise a knife back for an upper knife and a knife back for a lower knife, to which a plurality of double knife cutting elements are attached. The upper and lower blades are driven to oscillate back and forth.

The mower arrangement of the type considered here is one in which all three mower units are mounted on the front of the agricultural carrier vehicle (so-called butterfly arrangement). Such a mower arrangement is known, for example, from DE 10 2015 014 274 A1.

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In order to drive the carrier vehicle with attached mowers in the above-mentioned arrangement in public traffic, the laterally arranged mowers must be swiveled up. For this purpose, the mowers are swiveled into an approximately vertical position. After swiveling up, the mowers are secured in order to prevent mechanical or hydraulic failure

to prevent falling back into the horizontal position.

Due to the essentially vertical arrangement of the mowers in front of the driver's cab when driving, the driver's view is considerably restricted, particularly when cornering and turning. In addition, the vertically positioned mowers entail a considerable increase in the risk of injury, especially in the event of a collision with pedestrians or cyclists, because they protrude relatively far outside the vehicle. In addition, due to the required securing, the operating

reduced comfort.

Against this background, it is the object of the present invention to provide a mower arrangement which, on the one hand, results in less restriction of the field of vision in the highly pivoted state and, on the other hand, reduces the risk of injury in the event of an accident. According to the invention, this object is achieved with the features of claim 1.

With the invention, a mower arrangement is created, which in the swiveled-up state represents less visual obstruction for the vehicle driver. Due to the crossed arrangement, the field of vision is significantly less restricted, especially when cornering and turning, because there are no laterally protruding visual obstacles. In addition, the side mowing units are positioned above the vehicle when they are swiveled up, so that there is a risk of collision with the mowing units

of an accident is significantly reduced.

Booms are preferably provided on the cutter bars, on which the cutter bars rest in their transport position. This configuration allows for a

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ne additional securing can be dispensed with after swiveling up. This is caused by the fact that the cutter bars pivot from the horizontal working position beyond the vertical arrangement known from the prior art in the transport position in the direction of the vehicle. As a result, the center of gravity of the cutter bars is shifted in the direction of the vehicle, which is why the cutter bars in the transport position prevent their own weight from falling back into the working position.

working position are secured without additional safety measures.

Other developments and refinements of the invention are specified in the remaining subclaims. An embodiment of the invention is shown in the drawings and is described in detail below. It

demonstrate:

FIG. 1 a) the view of an agricultural carrier vehicle with a mower arrangement in the front attachment;

FIG. 1 b) the rear view of the arrangement shown in FIG. 1 a);

FIG. 1 c) the top view of the arrangement shown in FIG. 1 a);

FIG. 2 shows the enlarged sectional illustration of the plan view shown in FIG. 1 c);

FIG. 3 shows the perspective sectional illustration of the mower arrangement according to the invention;

FIG. 4 shows the enlarged side view of the illustration from FIG. 3;

FIG. 5 shows the perspective illustration of the arrangement shown in FIG. 4;

FIG. 6 a) the view of the mower arrangement according to the invention with the side mowers partially folded up;

FIG. 6 b) the top view of the arrangement shown in FIG. 6 a);

FIG. 7 a) the view of the mower arrangement according to the invention with the side mowers completely folded up;

FIG. 7 b) the top view of the arrangement shown in FIG. 7 a);

FIG. 8 a) the top view of the pivot bearing of the right side mower;

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FIG. 8 b) the perspective illustration of the pivot bearing shown in FIG. 8 a);

FIG. 9 shows the enlarged sectional view of the agricultural carrier vehicle shown in FIG. 1 with a mower arrangement;

FIG. 10 shows the perspective illustration of the carrier vehicle shown in FIG. 9;

FIG. 11 shows the arrangement shown in FIG. 9 with the cutter bar pivoted to the rear;

Figure 12 shows the perspective view of the arrangement shown in Figure 11

tion.

The mower arrangement selected as an exemplary embodiment is mounted on an agricultural carrier vehicle 1 via a support structure 2. The support structure 2 is designed in a known manner in the form of a three-point attachment as a lifting mechanism. The mower arrangement is attached via an add-on part 3 on which, in the exemplary embodiment, a power take-off shaft connection (not shown) is provided for driving the mower assembly via the power take-off shaft of the carrier vehicle 1. In a modification of the exemplary embodiment, the drive can also take place via the hydraulics of the carrier vehicle 1, for example. Two hydraulic cylinders 3.1 are hinged to the attachment 3.

The mower arrangement selected as an exemplary embodiment has three mower units in the form of three cutter bars 4.1, 4.2 and 4.3, which are all positioned in the direction of travel F in front of the carrier vehicle 1 (so-called butterfly arrangement). The cutter bar 4.1 forms the front cutter bar arranged in the middle; the cutter bars 4.2 and 4.3 form the side cutter bars. The side cutter bars 4.2 and 4.3 can be swiveled up. All cutter bars 4.1, 4.2 and 4.3 have skids (not shown) on their (lower) side facing the ground.

On the attachment 3, a V-shaped strut 5 is arranged, which the connection

to a frame 6 manufactures. The strut 5 is under the influence of the two hydraulic cylinders 3.1. With the help of the hydraulic cylinder 3.1, the frame 6 can with

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all attachments are lifted. The frame 6 is consequently arranged on the strut 5 so as to be movable and pivotable relative to the attachment 3. In addition, two support arms 7, which are also connected to the frame 6, are arranged on the attachment part 3 on the side facing the floor, spaced apart from the strut 5. The strut 5 and the support arms 7 are articulated on the attachment 3 and the frame 6.

The frame 6 has a support element 8 at each of its two front ends, which in the exemplary embodiment is oriented vertically. At the end of the support elements 8 facing the floor, a slide shoe 9 is formed in each case. Swath devices 20 are arranged on the sliding shoes 9 and guide the crop in a targeted manner past the components of the cutting unit positioned behind the support elements 8 in the direction of travel. The front cutter bar 4.1 is mounted on the frame 6 between the support elements 8. The frame 6

is vertically movable due to the connection of struts 5 and support arms 7.

Kinematics 10 are arranged on each of the support elements 8 and serve to fasten the lateral cutter bars 4.2 and 4.3 to the frame 6. The cutter bars 4.2 and 4.3 are hinged to the frame 6 in an articulated manner. Each of the lateral cutter bars 4.2 and 4.3 are provided with outriggers 11, which are connected to the frame 6 via the kinematics 10. The kinematics 10 is formed by struts which are attached to the front frame 6. The arms 11 are movably arranged on the frame 6 via the kinematics 10. The kinematics form a collision protection, which serves to be able to swivel the boom 11 with the cutter bars 4.2 and 4.3 backwards counter to the direction of travel F in the event of an overload on the cutter bars 4.2 and 4.3, which can occur, for example, when an obstacle hits to reduce the risk of damage (cf. FIGS. 11, 12).

The booms 11 are each provided with a drive shoe 12 at their end facing the ground. The drive for the lateral cutter bars 4.2 and 4.3 is mounted in each of the drive shoes 12. In the exemplary embodiment, this is a hydraulic drive. In addition, the drive shoes 12 are

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articulated arrangement of the side mowers 4.2 and 4.3 realized. The articulated arrangement enables the lateral cutter bars 4.2 and 4.3 to be moved, for example, in order to expand uneven floors that occur on one of the mowers.

to be able to.

Furthermore, the mechanism for pivoting up the lateral mowers 4.2 and 4.3 is arranged in the drive shoes 12. The cutter bars 4.2 and 4.3 are screwed to the drive shoes 12.

The drive shoes 12 have bores into which the bearing bushes 14 are inserted (see FIG. 8). In the assembled state, a bolt 15 is guided in the bearing bushes 14 and forms the pivot axis S for pivoting up the lateral cutter bars 4.2 and 4.3. The pivoting movement is effected by a hydraulically operated device in each case. During the mowing operation, this hydraulic device is brought into a floating position, so that the cutter bars 4.2 and 4.3 do not hinder evasive action in the event of uneven ground

will.

The hydraulically operated devices each include a hydraulic cylinder 16 which is fastened to a bolt passing through a link 17 at its ends facing the cutter bars 4.2 and 4.3. The handlebar 17 is attached to the drive shoe 12 in an articulated manner. The link 17 is consequently arranged between the drive shoe 12 and the hydraulic cylinder 16. An actuation of the hydraulic cylinder 16 consequently causes a pivoting movement of the cutter bars 4.2 and 4.3 about the pivot axis S formed by the bolt 15. With the aid of the link 17, the cylinder 16 can achieve a large pivoting angle of the cutting unit. In addition, the handlebar 17 enables the cutting mechanism to move freely and independently of the floating position.

As can be seen in Figure 8, the pivot axis S does not run at right angles to the longitudinal center line of the cutter bars 4.2 and 4.3; the pivot axis S consequently runs at an angle different from 90 ° to the longitudinal center line of the cutter bars 4.2 and 4.3. It is therefore not in the direction of travel or in the longitudinal direction of the

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Carrier vehicle 1 aligned, but at an angle to this. In the exemplary embodiment, the angle is approximately 5 °. Other angles are of course

also possible.

The angled alignment has the effect that the free ends of the cutter bars 4.2 and 4.3 experience a shift in or against the direction of travel F when they are pivoted up, as can be seen in FIGS. 6 b) and 7 b). In their end position or transport position shown in FIG. 7, the cutter bars 4.2 and 4.3 are arranged crossed with respect to one another (cf. FIG. 7 a)). In this end position, the cutter bars 4.2 and 4.3 rest on the booms 11 with their (upper) sides facing away from the ground in the operating position. In the exemplary embodiment, the arms 11 are therefore provided with damping elements 19 for gentle support.

The cutter bars 4.1, 4.2 and 4.3 are all attached to the frame 6 as described above; in the case of the side cutter bars 4.2 and 4.3 via the boom 11. Consequently, the side cutter bars 4.2 and 4.3 are always at the same height as the cutter bar 4.1 in the operating position. Since the frame 6 can be moved vertically via the lifting mechanism, all cutter bars 4.1, 4.2 and 4.3 can move from an operating position in which the cutter bars 4.1, 4.2 and 4.3 rest on the ground with the skids arranged on their underside into a higher one that is spaced from the ground Operating position can be moved to, for example, long-stalked grass

to let stand.

The complete attachment of the cutter bars 4.1, 4.2 and 4.3 to just one frame 6 offers various advantages: On the one hand, this results in a small distance from the carrier vehicle 1, which has a favorable effect on the center of gravity. On the other hand, this design results in a short distance between the cutter bars. Since the lateral cutter bars 4.2 and 4.3 are located behind the cutter bar 4.1, only a slight overlap of the cutter bars 4.1 and 4.2 and the cutter bars 4.1 and 4.3 is required. This ensures that no grass remains, even when cornering. The smaller the distance between the cutter bars, the smaller the necessary overlap, which is why

the very small distance after the construction according to the invention proves to be very advantageous. In addition, due to the complete attachment of all parts to the frame 6, in the event of a collision of the front cutter bar 4.1 with an obstacle, the entire frame 6 with all cutter bars 4.1, 4.2 and 4.3 moves backwards / upwards, as can be seen in FIGS. 11 and 12 is. If only the front cutter bar were to move backwards, a sufficiently large distance would be required between the front cutter bar 4.1 and the side cutter bars 4.2 and 4.3.

Claims (1)

15th 20th 25th -9- Claims Mower arrangement for attachment to a carrier vehicle with a frame (6), on which at least two cutter bars (4.2, 4.3) are arranged pivotably about a pivot axis (S) from an essentially horizontal working position into a transport position, characterized in that the cutter bars (4.2 , 4.3) are arranged crossed to one another in their transport position. Mower arrangement according to Claim 1, characterized in that the pivot axis S extends at an angle different from 90 ° to the longitudinal center line of the mower bars (4.2, 4.3). Mower arrangement according to Claim 2, characterized in that the angle is 85 ° or 95 ° to the longitudinal center line of the cutter bars (4.2, 4.3). Mower arrangement according to one of the preceding claims, characterized in that outriggers (11) are provided on the cutter bars (4.2, 4.3) on which the cutter bars (4.2, 4.3) rest in their transport position. Mower arrangement according to claim 4, characterized in that the Boom (11) are provided with damping elements (19). Mower arrangement according to one of the preceding claims, characterized characterized in that a link (17) between a drive shoe (12) and a hydraulic cylinder (16) is arranged.