EA045826B1 - MOUNTED CHOPPER WITH TRANSPORTATION CHANNEL FOR TRANSPORTING HARVESTED CROPS AND METHOD FOR TRANSPORTING HARVESTED CROPS - Google Patents

Description

The invention relates to a mounted chopper, which is designed for hanging on a tractor, primarily on the front or rear lifting mechanism of the tractor, and which has a connection point for channels for hanging the head unit, and in the direction of movement of the crop, a transport channel that penetrates the unit is adjacent to the connection point of the channels pre-compression and a grinding unit located behind it, and behind the grinding unit there is a discharge pipe through which the harvested crop is removed. The present invention further relates to a grinding structure with an attached chopper and a head unit, as well as a working unit with a tractor and a similar mounted chopper or a similar grinding structure.

Mounted choppers are designed for harvesting and chopping crops used for silage, primarily grass, hay and corn, but also whole plants. They are hung on or installed on the tractor. At the same time, mounted choppers are known from earlier times, which are used for harvesting from one to three rows of corn. In this form of implementation, mounted shredders are in most cases located on the side of the tractor. Such mounted shredders movable on the side of the tractor are disclosed in publications WO 2019/211512 A1 and DE 1185007 B.

Later, mounted shredders were also created, which are mounted on a tractor and which have a channel connection on which head units are modularly mounted, which are also suitable for self-propelled forage shredders. Thanks to this, different types of head units can be used with the same mounted shredder.

To allow the head units to be used modularly, the mounted shredder is often mounted on the front or rear lifting mechanism of the tractor. It is known that when mounted on a rear lifting mechanism, the tractor should be used in reverse mode during field harvesting. Compared to attaching a mounted shredder to the front lifting mechanism and operating the tractor during field harvesting in forward mode, the tractor can carry a higher load in reverse mode when driving in reverse.

For the reverse driving mode, tractors are known in which the steering wheel as well as the seat in the driver's cab can be rotated so that the seat is located behind the windshield and the steering wheel is in front of the rear window. In addition, tractors are known in which the entire cabin is rotatable through a rotation angle of 180°. With these tractors in the reversed position, in certain cases the shape as well as the cab superstructure must be taken into account.

In the past, the size of mounted head units was limited by the horsepower of the towing vehicle. In contrast, the currently known mounted shredders are no longer designed for the power of large tractor units.

It is an object of the present invention to provide a high-performance, mounted shredder that is suitable for attaching large head units to heavy-duty tractors, especially tractors of 500 horsepower or more.

This problem is solved by a mounted shredder with the features of independent claim 14 of the formula, a grinding structure with features of independent claim 1 of the formula, and a working unit with features of independent claim 15 of the formula. Preferred forms of implementation can be found in the dependent claims of the invention.

For this purpose, a grinding structure has been proposed. The chopping structure contains a mounted chopper having a channel connection point, and also contains a head device, which is hung on the channel connection point in the mounted grinder, wherein the head device has a head transportation channel through which the harvested crop is supplied to the channel connection point in the mounted grinder, and the mounted shredder has a transportation channel that is adjacent to the junction of the channels, and the head transportation channel in the head device in the area adjacent to the junction of the channels passes at an acute angle of entry relative to the ground, and the transport channel in the mounted shredder in the area adjacent to the junction of the channels passes under acute transportation angle relative to the head transportation channel in the head unit.

The mounted shredder is designed to be mounted on a tractor. It is advantageously mounted on the front or rear lifting mechanism of the tractor. The tractor has preferably 500 or more horsepower.

The mounted chopper has a channel connection point on which the head unit is mounted. Such a head unit may be provided for harvesting corn, for cutting and/or receiving grass or hay, or for harvesting whole plants. It can also be mounted primarily on self-propelled forage shredders.

In the direction of crop movement, the junction of the channels in the mounted chopper is adjacent to the transport channel, which penetrates the pre-compression unit and the grinding unit located behind it. Behind the grinding unit there is, in addition, a discharge pipe through which the harvested crop is discharged.

- 1 045826

In the corn harvesting structure, between the chopping unit and the discharge pipe, in addition, a processing device may be located through which the conveying channel passes. The processing device is provided to open the corn kernels so that the husk of the corn kernels is broken and the starch located inside the corn kernels becomes accessible to the outside. The hay harvesting structure, which harvests grass or hay, does not have a processing device.

An outlet pipe is preferably secured to the discharge pipe. The outlet pipe serves as an extension of the unloading pipe and is intended for unloading the harvested crop into a cargo cart. For this purpose, it is advantageously mounted on the discharge pipe with the possibility of rotation and/or height adjustment.

The pre-compression unit is preferably adjacent directly to the junction of the channels and has at least two or more pre-compression rollers, wherein the conveying channel in the pre-compression unit has an acute transport angle relative to the angle of entry of the harvested crop into the junction of the channels. In this case, the entry angle is the angle measured in relation to the working direction; on level ground it is primarily an essentially horizontal direction. The resulting relatively steep rise of the conveying channel in the pre-pressing unit ensures that the mounted shredder is designed short and compact in the operating direction.

The short and compact design of the mounted shredder means that the weight acting on the rear axle of the tractor is low enough to not reduce the load on the front axle too much. In addition, due to this, the lever arm with which the mounted chopper or the shredding structure containing the mounted chopper and the head unit mounted on it acts on the front or rear lifting mechanism of the tractor, and the distance from the center of gravity of the mounted chopper to the tractor is as small as possible.

Compared to a mounted chopper, the distance from the center of gravity of which to the tractor is greater, for this reason a larger head unit can be attached to the mounted chopper according to the invention. However, even if a mounted shredder is mounted on the rear lift of the tractor and when using a large head unit, for example a six, eight or even ten row head unit, this still does not require a counterweight on the front side of the tractor.

It is particularly advantageous if the transport angle is in the range of 15-30°, most preferably in the range of 18-25°.

In this case, in an advantageously preferred embodiment, the upper path of the channel of the conveying channel in the pre-pressing unit is shorter than the lower path of the channel. For this purpose, the pre-pressing unit preferably has two upper and three lower pre-pressing rollers, between which a conveying channel extends. In this case, the two pre-compression rollers that are respectively forward in the direction of crop movement can be provided larger than the pre-compression rollers located behind them in the direction of crop movement.

In a preferred embodiment, which also solves the problem, the discharge pipe is inclined in the working direction with respect to the direction of extension, which extends transversely to the working direction of the mounted chopper, especially in harvesting mode. Moreover, on level ground this direction of extension is essentially a vertical direction.

Due to the inclination of the unloading pipe in the working direction relative to the direction of extension, the mounted chopper, despite being located primarily at approximately the height of the rear lifting mechanism of the cab superstructure of the tractor carrying the mounted chopper, can be mounted closer to it. Therefore, even when using a tractor with a rotated cab and cab extensions above the rear lift, the mounted chopper can be mounted very close to the tractor.

By mounting the mounted shredder as close as possible to the tractor, the center of gravity of the mounted shredder shifts towards the tractor. As a result, the lever arm with which the mounted shredder or shredding structure acts on the front or rear lifting mechanism of the tractor is as small as possible. Due to this, the weight acting on the front or rear lifting mechanism of the tractor due to the presence of a mounted shredder or shredding structure is less than with other mounted shredders of the same design, in which the discharge pipe is not inclined in the working direction or even inclined against the working direction .

Compared to the mounted shredder, which has a larger distance from the center of gravity to the tractor, this mounted shredder can also accommodate a larger head unit. In this case, it is preferable if the discharge pipe rests on the body of the mounted shredder, especially on the body of the pre-compression unit or the shredding unit. The angle of inclination by which the unloading nozzle is inclined in the working direction relative to the direction

- 2 045826 niyu length, preferably in the range of about 4-15°. Particularly preferably, the angle of inclination is in the range of about 7-10°.

In a preferred embodiment, the mounted shredder has, in order to operate its units, in particular the pre-compression unit and/or the shredding unit, a connection point to the power take-off shaft for connection to the power take-off shaft of the tractor unit. The use of the tractor's power take-off shaft to drive the units creates the conditions for high harvesting performance with the mounted shredder and, thus, for the design of the mounted shredder in a size corresponding to the powerful tractor. However, connecting the chopper attachment to the power take-off shaft requires a minimum distance between the chopper attachment and the tractor.

When using the power take-off shaft of a tractor to drive a mounted chopper, the slope of the discharge pipe creates conditions for hanging the mounted chopper on the tractor with a minimized distance between them.

To achieve the most symmetrical load on the mounted shredder, due to which the center of gravity of the mounted shredder is in the plane passing through it approximately in the center, which is formed by the direction of extension and the working direction, it is preferable if the unloading pipe is located in the vertical direction above the junction of the channels, and in the working direction it is located in the same plane with the junction of the channels.

The chopping unit preferably has a shear plate as well as a chopping drum, between which the harvested crop is crushed. In addition, the conveying channel advantageously extends between the grinding drum and the transport bottom, which is arranged at least in sections concentrically relative to the grinding drum.

In this case, it is preferable if the angle of coverage of the transport channel around the chopping drum does not depend on the hanging height and/or the mounting angle of the mounted shredder on the tractor relative to the ground. For this purpose, the grinding unit and the pre-pressing unit are preferably rigidly connected to each other. Therefore, the cutting angle at which the crop enters from the pre-press unit into the chopping unit and is cut between the shear plate and the chopping drum is always the same. It is preferably about 80-100°, particularly preferably about 90°.

Additionally or alternatively, a coverage angle is preferably greater than 115°, particularly preferably about 125-165°, highly preferably about 145°. Although a large coverage angle contributes to increased friction of the harvested crop along the transport bottom, nevertheless, due to this, the harvested crop can be discharged into the unloading pipe, which is inclined in the working direction relative to the direction of extension, approximately in a straight line.

For this purpose, the discharge pipe is preferably located stationary on the body of the mounted chopper and therefore does not change its position in relation to the chopper drum.

The steeply positioned conveyor channel in the pre-press unit, the large coverage angle as well as the inclination of the discharge nozzle require higher drive power compared to a conveyor channel optimized for crop movement. However, in contrast to this, these measures create the conditions for a compact, short design shape and a very short distance between the tractor-mounted shredder and the tractor. This optimizes the distance from the center of gravity of the mounted shredder to the tractor. Thanks to this, the mounted shredder can be used on a tractor even with large head units.

In addition, the problem is solved by a grinding structure, which has a mounted grinder with a channel connection point, first of all, a similar mounted grinder, as well as a head unit, which is mounted on the channel connection point in the mounted grinder. The head unit advantageously has a head conveying channel through which the harvested crop is supplied to the connection point of the channels in the mounted shredder. In addition, it is advantageous if the mounted shredder has a transport channel that is adjacent to the connection point of the channels.

In a preferred embodiment, the head transport channel in the head device in the area adjacent to the channel connection point runs at an acute entry angle relative to the working direction, especially on level terrain relative to the ground and/or horizontal, and the transport channel in the mounted shredder in the area adjacent to the channel connection point area passes at an acute transportation angle relative to the head transportation channel in the head unit.

It is particularly advantageous if the hanging angle is in the range of 1530°. Highly preferably, the hanging angle is approximately 18-25°.

Due to the relatively steep rise of the transport channel in the pre-press unit

- 3 045826 The mounted shredder is designed to be compact and has a short length in the working direction. As a result, the lever arm with which the grinding structure acts on the front or rear lifting mechanism of the tractor on which it is mounted is smaller compared to the flat lift conveying channel in a pre-press unit. Thanks to this, a large head unit can be attached to the grinding structure.

In addition, the problem is solved by a working unit comprising a similar mounted shredder or a similar shredding structure. This working unit has a tractor, first of all, with a power of 500 horsepower or more, on which a mounted chopper is mounted, first of all, on the front or rear side, first of all on the front lifting mechanism or on the rear lifting mechanism. The work unit's mounted chopper is a modular head unit that is mounted or mounted and is driven to harvest the crop being harvested. In this case, the head unit can be made in six rows or more.

The mounted shredder deliberately takes into account the non-optimal change in direction of movement of the harvested crop, especially in the direction of length and/or in the working direction, as well as in relation to the angle of coverage of the passage of the transport channel. This, in turn, creates the conditions for optimizing the distance from the center of gravity of the mounted chopper to the tractor, especially to the axle that carries it. Due to this, the weight acting on the lifting mechanism is reduced so much that it is possible to attach a large head unit to the tractor. In this case, the mounted shredder is designed for a large tractor.

In the following, the invention is described with the help of figures. These figures are examples only and do not limit the general idea of the invention. Shown on:

fig. 1 in (A) - in a side view of the working unit in operating mode in the field with a tractor in reverse driving mode, on which is mounted a chopping structure, which contains a mounted chopper in a configuration for harvesting corn and a head unit modularly mounted on it, and on ( B) - the working unit from (A) in the form showing the front side of the mounted chopper and the head unit;

fig. 2 in (A) - a grinding structure with a mounted grinder and a head unit according to FIG. 1 is a cross-sectional view, and (B) is a side view of the grinding structure containing the mounted grinder according to FIG. 1 in a hay harvesting arrangement and a different type of head unit, and FIG. 3 working unit according to Fig. 1 in side view in road driving mode.

In fig. 1 shows a working unit 100 with a tractor 3, on which is mounted a grinding structure, which contains a mounted chopper 1, as well as a head unit 2, modularly mounted on the mounted chopper 1. The mounted chopper 1 is mounted here on the rear lifting mechanism 11 of the tractor 3. The articulated joint can be seen. of the mounted chopper 1 with the rear lifting mechanism 11 of the tractor 3 using the lower links 13 and the upper link 12. In addition, this figure schematically shows the connection point 16 to the power take-off shaft for connecting the mounted chopper 1 to the power take-off shaft (not shown) tractor 3. The mounted chopper 1 is driven by the power take-off shaft of the tractor 3.

This image shows the work unit 100 in field operation mode F, in which the chopping structure is used to harvest and chop the harvested crop 5, primarily corn. In this case, the tractor 3 is operated in reverse mode R. The reverse mode R is shown here schematically by the direction 30 of rotation of the wheels 31.

As the head unit 2, the head unit 2 for harvesting corn is shown here as an example. However, the mounted shredder 2 can also be operated with head units 2 of another type, for example with head units 2 for harvesting whole plants or for collecting grass or hay, in particular with a mowing mechanism for cutting grass or with a pick-up mechanism for receiving grass or hay.

For transport purposes, the head unit 2 can be folded G (see FIG. 3). In mode F of work in the field, it is not folded U (unfolded).

The harvested crop 5 is cut and/or received by the head device 2 and, through the head transport channel 23, is supplied in the direction 50 of crop movement to the mounted chopper 1. The head device 2 is hung at the channel connection point 21 in the mounted chopper 1. The channel connection point 21 has an opening 22 channels. , through which the harvested crop 5 is transported in the transport channel 14 in the mounted chopper 1.

In fig. 1 mounted chopper 1 shown in M layout for corn harvesting. In the arrangement M for harvesting corn, the mounted chopper 1 houses a processing device 8, which is provided for opening the corn grains so that the starch inside the corn grains is accessible from the outside and so that the corn is edible for farm animals. In addition, the processing device 8 can be used when harvesting whole plants to grind cereal grains. In arrangement H for hay harvesting, which is shown in FIG. 2(B), the processing device 8 is not provided in the mounted shredder 1, so that during harvesting it is prevented

- 4 045826 Splitting grass or hay into fibers.

The mounted shredder 1 has a pre-compression unit 6, which is directly adjacent to the channel connection point 21. In the working direction 41, in which the mounted chopper 1 moves across the field in field operation mode F (not indicated), the pre-compression unit 6 is located in front. It is located directly behind the 21 channel junctions. Therefore, the harvested crop 5 moves from the head unit 2 through the channel opening 22 directly into the pre-compression unit 6.

The pre-compression unit 6 here has five transport rollers 61-65, which define the transport channel 14. In this case, two of the pre-compression rollers 61, 62 are provided as upper, and three as lower pre-compression rollers 63, 64, 65.

Behind the pre-compression unit 6 in the direction 50 of crop movement there is a chopping unit 7. The chopping unit 7 contains a shear plate 72 and a chopping drum 71, between which the harvested crop 5 is crushed. The shear plate 72 is located behind the last lower pre-compression roll 65 and is positioned so that The harvested crop 5 enters the chopping drum 71 at approximately a right angle. As a result, a cut as smooth as possible can be achieved without the harvested crop 5 being decomposed into fibres.

In the chopping unit 7, disc wheels (not shown) can also be used for grinding the harvested crop. However, with the chopping drum 71 a significantly higher, consistently good grinding quality is achievable. The task-relevant higher weight of the grinding drum 71 compared to disc wheels is therefore consciously accepted here in the interests of better grinding quality.

When the mounted shredder 1 operates, the chopping drum 71 rotates around the grinding axis (not designated) in the direction of rotation during grinding (not designated). On the chopping drum 71, chopping knives (not shown) are located evenly distributed in the direction of rotation during chopping, which are provided for cutting the harvested crop 5. When the mounted chopper 1 operates, the chopping knives rotate together with the chopping drum 71 in the direction of rotation during chopping. In this case, the harvested crop 5 comes into contact with the chopping knives and is cut accordingly between one of the chopping knives and the counter-cutting plate 72.

The transport channel 14 is limited in the grinding unit 7 by the grinding drum 71 and the transport bottom 73, which extends at least in sections concentrically relative to the grinding drum 71.

The processing device 8 is located in the direction 50 of crop movement after the crushing unit 7. It has two crushing rollers 81, 82. When the mounted crusher 1 operates, the crushing rollers 81, 82 rotate respectively around the crushing axis (not marked) in the direction of rotation during crushing (not marked ), and the directions of rotation during crushing of both crushing rollers 81, 82 are opposite to each other. When the mounted grinder 1 operates, corn is transported through and through between the crushing rollers 81, 82. In this case, the shell of the corn kernels or cereal grains is destroyed, so that the starch located inside the corn kernels becomes accessible. Therefore, the conveying channel 14 extends in the processing device 8 between the crushing rollers 81, 82.

Following this, the crushed harvested crop 5 is discharged through the unloading device 9. The unloading device 9 has a discharge pipe 91, which is permanently attached to the body 15 of the mounted shredder 1. An outlet pipe 92 is attached to the unloading pipe 91, which serves as an extension and with the help of which the harvested crop 5 can be unloaded into a cargo cart (not shown). In fig. 1(A) shows only a portion of the outlet pipe 92. The complete outlet pipe 92 is shown in FIG. 1(B). Therefore, the transport channel 14 is limited in the unloading device 9 by the unloading pipe 91 and the outlet pipe 92.

At the open end (not designated) of the outlet pipe 92 there is an adjustable outlet valve (not designated), with the help of which the drop location of the harvested crop 5 in the cargo cart is adjusted.

In fig. 1(B) shows the work unit 100 according to FIG. 1(A) in a view showing the front side of the mounted chopper 1 and the head unit 2.

The implement 100 is in field operation mode F. Therefore, here the mounted chopper 1 is also mounted on the lifting mechanism 11 of the tractor 3. Therefore, the tractor 3 is similar to FIG. 1(A) is in reverse mode R. In addition to this, the head unit 3 is therefore not folded (U).

The head transport channel 23 can be seen, as well as the channel opening 22 at the channel connection point 21. The harvested crop 5 is fed through the head transportation channel 23 in the direction 50 of the crop movement into the channel opening 22 and is received there by the mounted chopper 1.

In addition to this, FIG. 1(B) shows that the mounted chopper 1 is located on the tractor 3

- 5 045826 in the middle. Due to this, the center of gravity (not shown) of the mounted shredder 1 is located in the plane E passing through it approximately in the middle, which is formed by the extension direction 42, which extends transversely to the working direction 41, and the operating direction 41. In the transverse direction 43, passing transversely to the extension direction 43 and across the working direction 41, the plane E passes through the working unit 100 approximately in the middle.

As a result, the harvested crop 5 is drawn into the mounted chopper 1 in the middle. In addition, the unloading pipe 91 of the unloading device 9 is mounted on the body 15 of the mounted shredder 1 in the middle. Thus, the harvested crop 5, after entering the mounted shredder 1 through the channel opening 22, no longer deviates significantly in the transverse direction 43 or against it, until it is directed through the unloading pipe 91 into the outlet pipe 92. Only there is it deviated in the direction of the cargo trolley , which can move to the side of the tractor 3 or behind it. Due to this, the load on the mounted shredder 1, especially on its units 6, 7, is distributed essentially symmetrically relative to the plane E.

In addition, in FIG. 1(B) shows that the discharge pipe 91 rests on the body 15 of the mounted shredder 1 with the help of two support posts 93 located symmetrically relative to plane E.

In fig. 2(A) shows a grinding structure with a mounted grinder 1 and a head unit 2 according to FIG. 1 in cross-sectional image.

The grinding structure is elevated relative to the ground 4, so that the cutting tools (not shown) of the head unit 2 are in the cutting plane 24. In this case, the cutting plane 24 runs parallel to the working direction 41 and/or the ground 4. On level ground, the cutting plane 24 runs essentially horizontally. Based on it, the cut harvested crop 5 is transported at an acute entrance angle 20 through the channel opening 22 at the place 21 connecting the channels into the mounted chopper 1. For this purpose, the head transportation channel 23 has an acute entrance angle 20 relative to the cutting plane 24 or the ground 4.

Adjacent directly to the channel connection point 21, the pre-compression unit 6 has five pre-compression rollers 61-65. Pre-compression rollers 61-65 are formed for transporting and pressing the harvested crop. To do this, they rotate respectively in the direction of rotation (not marked) around the axis of rotation (not marked). In this case, the upper pre-pressing rollers 61, 62 are provided with a counter-direction of rotation relative to the lower pre-pressing rollers 63-65. Due to this, the harvested crop 5 is transported between the pre-compression rollers 61-65 in the crop movement direction 50 and is compressed in the process. After pressing, it is fed directly to the grinding unit 7.

The transport channel 14 extending between the pre-compression rollers 61-65 has an acute transport angle 60 with respect to the head transport channel 23 . Despite the relatively long lower channel path 67 due to the three lower pre-press rollers 63-65, the mounted shredder 1 is relatively short due to the steep rise of the transport channel 14. It is advantageous that the upper channel path 66 formed by the two upper pre-press rollers 61, 62 is shorter than the lower channel path 67.

The harvested crop 5 is brought approximately at a right angle (not indicated) to the chopping drum 71 and there it is cut between the shear plate 72 and the chopping knife located on the chopping drum 71, respectively. Then it is transported in the part of the transport channel 14 limited by the grinding drum 71 and the transport bottom 73 in the direction of the discharge pipe 91. In this case, it passes through the processing device 8.

In order to guide the harvested crop 5 towards the discharge pipe 91 as straight as possible, the sweep angle 70 over which the harvested crop 5 passes substantially concentrically around the chopping drum 71 is provided to be large.

In addition, the discharge pipe 91 is inclined with respect to the extension direction 42, on level ground this is approximately a vertical direction, in the working direction 41 by an angle of 90 degrees. The unloading pipe 91 assumes an inclination angle 90 in a suspended state, in which the upper link 12 of the lifting mechanism 11 supporting the mounted shredder 1 is tensioned and/or the housing frame 17 of the housing 15 is directed substantially vertically on level ground. This can prevent collisions with cab superstructures (not shown) of tractors 3 in which the driver's cab (not shown) is rotated in reverse mode R.

In addition to this, the tilt at an angle of 90 creates conditions so that when the mounted chopper 1 is mounted on the lifting mechanism 11, first of all, such a tractor 3, the distance (not shown) to it is very small.

These measures, especially the selected tilt angle 90, the coverage angle 70 as well as the transport angle 60, help to optimize the distance (not shown) from the center of gravity of the mounted chopper 1 to the tractor 3, especially to its rear axle (not shown) in R mode reversing. Behind

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Claims (10)

Due to this, the weight of the chopping structure acting on the rear axle is sufficiently small, so that large modular head units 2 can also be operated on the mounted shredder 1, without requiring the use of counterweights 3 on the front side of the tractor (not shown). In fig. 2(B) shows a mounted chopper 1 in structure H for harvesting hay. Therefore, it differs from the mounted shredder 1 in FIG. 1(A) and (B), as well as 2(A) in that it does not have a processing device 8, which is located after the chopping drum 71. Therefore, when harvesting hay or grass, the harvested crop 5 after chopping is discharged directly through the transport channel 14 and unloading pipe 91, and from there through the outlet pipe 92 into the cargo trolley. In addition, the grinding structure in FIG. 2(B) is distinguished by a head device 2 mounted on the mounted chopper 1. It has a pick-up 25 and is suitable for receiving windrows of hay or grass. In fig. 3 shows the work unit 100 of FIG. 1 in road driving mode S. In road driving mode S, the tug 3 moves in forward driving mode V against the operating direction 41. This is shown schematically by the direction 30 of rotation of the wheels 31. In this case, the outlet pipe 92 is directed in the working direction 41 and is lowered. In addition to this, the rear portion (not designated) of the pipe is folded onto the front portion (not designated) of the pipe so that the outlet pipe 92 projects beyond the mounted shredder 1 in the operating direction 41 not so far. In addition, the head unit 2 is in the folded state G and therefore does not protrude beyond or against the tractor 3 in the transverse direction 43. CLAIM 1. A grinding structure containing a mounted chopper (1) intended for hanging on a tractor (3) and having a channel connection point (21), and also containing a head unit (2) that is hung on a channel connection point (21) in the mounted grinder (1), and the head device (2) has a head transportation channel (23), through which the harvested crop (5) is supplied to the channel connection point (21) in the mounted chopper (1), and the mounted chopper (1) has a channel ( 14) transportation, which is adjacent to the channel connection point (21), and the head channel (23) of transportation in the head device (2) in the area adjacent to the channel connection point (21) passes at an acute angle (20) of the entrance relative to the ground (4) , and the transportation channel (14) in the mounted chopper (1) in the area adjacent to the channel connection point (21) runs at an acute transportation angle (60) relative to the head transportation channel (23) in the head device (2). 2. The grinding structure according to claim 1, characterized in that in the direction (50) of the movement of the crop, the channel connection point (21) is adjacent to the transportation channel (14), which penetrates the pre-compression unit (6) and the grinding unit (7) located behind it ), and behind the grinding unit (7) there is a discharge pipe (91), through which the harvested crop (5) is removed, and the pre-pressing unit (6) is adjacent directly to the connection point (21) of the channels and contains at least two roller (61, 62) of pre-compression or more, and the channel (14) of transportation in the unit (6) of pre-compression has an acute angle (60) of transportation in relation to the angle (20) of the entry of the harvested crop (5) into the connection point (21) channels. 3. The grinding structure according to claim 1 or 2, characterized in that the upper path (66) of the channel of the conveying channel (14) in the pre-compression unit (6) is shorter than the lower path (67) of the channel. 4. The grinding structure according to one of the previous paragraphs, characterized in that the pre-compression unit (6) has two upper (61, 62) and three lower pre-compression rollers (63-65), between which a transport channel (14) extends. 5. Grinding structure according to one of the preceding claims, characterized in that the transport angle (60) is approximately 15-30°, in particular approximately 18-25°. 6. The grinding structure according to one of the preceding paragraphs, characterized in that the discharge pipe (91) is inclined in the working direction (41) with respect to the extension direction (42), which extends across the working direction (41) of the mounted grinder (1). 7. The grinding structure according to one of the previous paragraphs, characterized in that the discharge pipe (91) is located permanently on the body (15) of the mounted grinder (1). 8. The grinding structure according to one of the previous paragraphs, characterized in that the discharge pipe (91) rests on the body (15) of the mounted grinder (1). 9. The grinding structure according to one of the preceding paragraphs, characterized in that the discharge pipe (91) is inclined in the working direction (41) relative to the extension direction (42) by an angle (90) of inclination of approximately 4-15°, especially approximately 7-10°. 10. The grinding structure according to one of the previous paragraphs, characterized in that the discharge pipe (91) is located in the direction (42) of the extension above the opening (22) of the channel at the point (21) of the connection of the channels, and in the working direction (41) the discharge pipe ( 91) located -