BE1025800B1 - Attachment of an agricultural harvesting vehicle and agricultural harvesting vehicle - Google Patents

Abstract

Attachment (3) of an agricultural harvesting vehicle, comprising a transverse compensation control device comprising a transverse compensation cylinder (4), the transverse compensation cylinder (4) being connected between a first operating situation in which it controls or regulates a predetermined transverse compensation movement of the attachment (3). serves, and a second operating situation, in which the same provides the provision of a free cross-balancing movement of the attachment (3), can be transferred.

Description

The Minister for Enterprise

Due to the Paris Treaty of March 20, 1883 for the protection of industrial property;

Introduced under the Act of March 28, 1984 on Inventive Patents, Article 22, for applications prior to September 22, 2014;

Based on Title I “Invention Patents” of Book XI of the Economic Code, Article XI.24, introduced for applications from September 22, 2014;

Based on the royal decree of December 2, 1986 on the registration, granting and maintenance of patents for invention, Article 28;

Recorded on 13/06/2018 at the Intellectual Property Office based on the protocol.

Considering that for patent applications that fall within the scope of Title 1, Book XI, of the Economic Code, in accordance with Article XI.19, Section 4, second paragraph, of the Economic Code, if the patent application is the subject of a search report in which a lack of unity of invention within the meaning of paragraph 1 is mentioned, and if the applicant does not limit his application and does not file a divisional application in accordance with the search report, the granted patent will be limited to the claims for which the search report was created.

DECIDES:

Article 1. - An invention patent is granted to:

CLAAS Saulgau GmbH, Zeppelinstrasse 2, 88348 BAD SAULGAU Germany;

represented by :

GEVERS PATENTS, Holidaystraat 5, 1831, DIEGEM;

for a period of 20 years, subject to the payment of the annual patent fees mentioned in Article XI.48, §1 of the Economic Code, for: attachment of an agricultural harvesting vehicle and agricultural harvesting vehicle.

INVENTOR:

ARNOLD Uwe, Melchior-Schramm-Strasse 21, 72488, SIGMARINGEN;

ROTHMUND Stefan, Magdalena-Schlegel-Strasse 1, 88367, HOHENTENGEN;

FISCHER Josef, Gartenweg 5, 88400, METTENBERG;

PRIORITIES) :

27/06/2017 DE 102017114281.9;

SEPARATION:

Partial application of the previous application:

Filing date of the previous application:

Article 2. - This patent is granted without any prior examination of the patentability of the invention, without guaranteeing the merit of the invention or the accuracy of the description thereof, and at the sole risk of the patent applicant (s).

Brussels, 17/07/2019,

In special representation:

BE2018 / 5392

Agricultural harvesting vehicle header and agricultural harvesting vehicle

The invention relates to an attachment of an agricultural harvesting vehicle according to the preamble of claim 1. Furthermore, the invention relates to an agricultural harvesting vehicle.

DE 10 2015 105 217 A1 discloses an attachment with a cross compensation control device comprising a cross compensation cylinder. With the aid of the transverse compensation cylinder, the front attachment can be displaced about an axis extending in the direction of travel of an agricultural harvesting vehicle, in order to compensate for unevenness in the ground that is seen transversely to the direction of travel of the harvesting vehicle. For this purpose, buttons are arranged on the side of the front attachment, which can detect unevenness in the ground, in order to control the transverse compensation cylinder to compensate for the unevenness in the ground.

Proceeding from this, the present invention is based on the object of creating a novel attachment for an agricultural harvesting vehicle.

This object is achieved by an attachment according to claim 1.

According to the invention, the transverse compensation cylinder can be transferred via a switching device between a first operating situation, in which it serves to control or regulate the pendulum movement of the attachment, and a second operating situation, in which the same serves to provide a free pendulum movement of the attachment.

This enables a particularly advantageous operation of the front attachment. In the first operating situation, the pendulum movement, i.e. the transverse compensation movement of the front device is controlled or regulated to predetermined values or positions

BE2018 / 5392, in particular to compensate for uneven floors depending on signals from floor sensors. In the second operating situation, the front attachment can perform a free pendulum movement or a free transverse compensation movement. The transverse compensation movement is controlled by skids, which are arranged on the underside of the front attachment and rest on the floor during operation and follow the contour of the floor.

The free pendulum movement or transverse compensation movement can take place without loss of flow and without restoring forces.

According to a preferred embodiment, the transverse compensation cylinder is designed as a synchronous cylinder. A synchronous cylinder, which is also referred to as a synchronous cylinder, has the advantage that the same piston surfaces are present on both sides of a piston. The volume of the inflowing hydraulic oil and the volume of the outflowing hydraulic oil are therefore of the same size, so that a synchronous cylinder moves in and out at the same speed. A particularly advantageous cross-compensation control can thus be implemented.

The switching device preferably separates pressure chambers of the synchronous cylinder from one another in a first switching position to provide the first operating situation, whereas the switching device couples the pressure chambers of the synchronous cylinder from one another in a second switching position to provide the second operating situation. In this way, the transverse compensation cylinder designed as a synchronous cylinder can be transferred between the two operating situations or the two operating modes in a particularly advantageous, simple and reliable manner.

Each pressure chamber of the synchronous cylinder can preferably be supplied with hydraulic oil via a respective hydraulic line, in each of which a check valve is integrated. Each hydraulic line has one parallel to each

BE2018 / 5392 check valve connected bypass line, in each of which a pressure relief valve is integrated. The respective pressure relief valve then opens automatically when, in the first operating situation, a pressure at the respective pressure relief valve exceeds a limit value, hydraulic oil then starting from the pressure chamber in which the pressure above the limit value prevails, via the bypass line with the opened pressure relief valve into the other one Pressure chamber of the synchronous cylinder and / or in a hydraulic oil tank is conductive, in which there is a pressure below the limit. This can reliably protect the attachment from damage.

The switching device can preferably be actuated automatically in order to transfer the transverse compensation cylinder between the first operating situation and the second operating situation. The switching device can preferably be actuated automatically as a function of the ground pressure of a ground pressure control in such a way that when the ground pressure of the ground pressure control is less than a limit value, the switching device automatically assumes the first switching position and that when the ground pressure is greater than the limit value, the switching device automatically occupies the second switch position. Characterized in that when the ground pressure is greater than the limit value, the attachment is automatically operated in the second operating situation of the cross compensation cylinder, the attachment can be operated particularly advantageously with active soil pressure control. In particular, a push-on of a floor to be worked on can be prevented by the attachment. The automatic actuation of the switching device depending on the ground pressure allows a particularly preferred operation of the attachment.

According to an advantageous development of the invention, the synchronous cylinder has a piston and a piston rod on each side of the piston, a first piston rod on a first side of a

BE2018 / 5392

The housing protrudes and is stronger on this first side, i.e. further, removable from the housing or stronger, i.e. deeper or farther, into the housing, and wherein a second piston rod on a second side of the housing is completely enclosed by the housing and is displaceable within the housing. A first fastening eye of the synchronous cylinder is preferably formed on a section of the first piston rod protruding from the housing and a second fastening eye of the synchronous cylinder is formed on the second side of the housing. This constructive design of the transverse compensation cylinder designed as a synchronous cylinder is preferred in order to enable the transverse compensation cylinder to be easily installed in the attachment.

As an alternative to a synchronous cylinder, two single-acting cylinders could be provided, which are arranged in such a way that their directions of action oppose or work against each other.

Furthermore, as an alternative to a synchronous cylinder, it is also possible to provide a double-acting cylinder. All that needs to be taken into account is that the piston rod moves at different speeds when extending and retracting due to the different effective areas of the two piston sides. This can be compensated for by correspondingly different control.

The agricultural harvesting vehicle is defined in claim 13.

Preferred developments of the invention result from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being restricted to this. It shows:

BE2018 / 5392

Fig. 1 is a perspective view of an agricultural

Harvesting vehicle with an attachment according to the invention;

Fig. 2 shows a detail of Fig. 1;

Fig. 3 is a hydraulic diagram to further illustrate the invention.

The invention relates to an attachment of an agricultural harvesting vehicle. The invention further relates to an agricultural harvesting vehicle with such an attachment.

1 shows a preferred exemplary embodiment of an agricultural harvesting vehicle 1, which comprises an agricultural carrier vehicle 2 and an agricultural header 3. The attachment 3 of FIG. 1 is a maize header, and the agricultural harvesting vehicle 1 is therefore a forage harvester. The invention is not limited to a front attachment 3 designed as a maize header. Rather, the invention can also be used in a header designed as a combine cutting device, corn picker, pick-up, direct cutting device and the like. The harvesting machine can accordingly be designed as a forage harvester, combine harvester or the like.

It is known from practice that an attachment 3 comprises a cross compensation control device with a cross compensation cylinder 4.

With the aid of the transverse compensation cylinder 4 of the transverse compensation control device, the front attachment 3 can carry out a transverse compensation movement in the direction of the arrow 5 around an axis 6 of the harvesting vehicle 1 extending in the direction of travel, for example to compensate for uneven ground on a surface to be worked. The transverse compensation movement is sometimes also referred to as a pendulum movement.

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So Fig. 1 floor buttons 7 are shown, which scan the soil to be worked in harvesting operation and can detect unevenness in the floor.

Uneven floors along a direction extending transversely to the direction of travel along the front attachment 3 can be compensated for if the cross compensation cylinder 4 is actuated as a function of the measurement signals of the floor buttons 7, in order to then in particular achieve a constant working height for the front attachment.

In the exemplary attachment 3, the transverse compensation cylinder 4 is designed as a synchronous cylinder. A synchronous cylinder is also called a synchronous cylinder. Instead of a synchronous cylinder, two single-acting cylinders could be provided, which are arranged in such a way that their directions of action oppose or work against each other.

Furthermore, as an alternative to a synchronous cylinder, it is also possible to provide a double-acting cylinder. It is only necessary to take into account that the piston rod moves at different speeds when extending and retracting due to the differently sized effective areas of the two piston sides, and that the two pressure chambers displace different amounts of hydraulic fluid. This can be compensated for by correspondingly different control.

2 shows a cross section of a section through a transverse compensation cylinder 4, embodied as a synchronous cylinder, of an attachment designed according to the invention.

2 has a piston 9 which is guided in a housing 8 of the synchronization cylinder 4. A piston rod 10 or 11 engages on both sides of the piston 9. The piston rods BE2018 / 5392 gen 10, 11 have identical cross-sectional areas, so that the piston 9 has identical piston surfaces 12, 13 on both sides.

The first piston rod 10 protrudes from the housing 8 on a first side 14 of the housing 8, whereas the second piston rod 11 is completely enclosed by the housing 8 on a second side 15 of the housing 8 and accordingly does not protrude from the housing 8. For this purpose, the housing 8 on the second side 15 of the same is extended to form an extension 16. A first pressure chamber 17 is formed adjacent to the first piston surface 12 of the piston 9 and a second pressure chamber 18 of the synchronous cylinder is formed adjacent to the second piston surface 13.

Then, when the pressure in the second pressure chamber 18 is greater than in the first pressure chamber 17, the piston 9 can be displaced further towards the first end 4 of the housing 8, the piston rod 10 then being moved further out of the housing 8 ,

On the other hand, if there is a higher pressure in the first pressure chamber 17 than in the second pressure chamber 18, the piston 9 can be displaced further towards the second end 15 of the housing 8, the first piston rod 10 then moving further into the housing 8 ,

In the above movements, the second piston rod 11 is always guided within the housing 8 and can therefore be displaced within the housing 8.

A first fastening eye 19 is formed on that section of the first piston rod 10 which projects from the housing 8. A second fastening eye 20 is formed on the extension 16 of the housing 8, that is to say on the second side 15 of the housing 8.

The transverse compensating cylinder 4, which is designed as a synchronous cylinder, is mounted on the attachment via these fastening eyes 19, 20.

BE2018 / 5392

According to the invention it is provided that the transverse compensation cylinder, which is preferably designed as a synchronous cylinder 4, can be operated in two different operating situations or operating modes, between which the same can be transferred using a switching device 21. In a first operating mode or a first operating situation, the transverse compensation cylinder 4 serves to control or regulate the transverse compensation movement 5 of the attachment 3, in particular depending on signals provided by the floor buttons 7. A cutting height control can then be provided in this first operating situation. In a second operating mode or a second operating situation, the transverse compensation cylinder 4 is used to provide a free pendulum movement 5 or a free transverse compensation movement of the attachment 3, in particular to provide a so-called ground pressure control.

In the case of the free transverse compensation movement, the attachment 3 is placed on the ground to be worked with a predeterminable force or with a predeterminable ground pressure and is supported on the ground by means of skids or other sliding elements. During work, the skids or sliding elements are guided over the floor and feel its contour. If a sliding element runs onto a bump, the attachment is raised at this point and if a sliding element runs into a depression, the attachment 3 is lowered accordingly. The second operating mode makes it possible for the attachment 3 to carry out the transverse compensation movement 5 in a controlled manner by means of the skids or sliding elements.

The switching device 21, which is used to transfer the transverse compensation cylinder 4 between these two operating situations or between these two operating modes, is designed in the exemplary embodiment in FIG. 3 as a 2/2-way valve which is part of a hydraulic module 22.

BE2018 / 5392

In the first switching position of the switching device 21 shown in FIG. 3, the pressure chambers 17, 18 of the synchronous cylinder 4 are separated from one another. In this case, hydraulic oil can then be supplied to the pressure chamber 17 via a first hydraulic line 23 and hydraulic oil to the pressure chamber 18 via a second hydraulic line 24, wherein a check valve 25, 26 is preferably integrated in each of the hydraulic lines 23, 24. The check valves 25, 26, like the switching device 21, are preferably part of the hydraulic module 22.

3 shows pressure limiting valves 27, 28 as further components of the hydraulic module 22. A first pressure limiting valve 27 is connected into a bypass line 29 which extends parallel to the first check valve 25. A second pressure relief valve 28 is integrated in a bypass line 30 which extends parallel to the second check valve 26.

As already stated, in the first operating mode or in the first operating situation, in which the switching device 21 assumes the switching position of FIG. 3, the two pressure chambers 17, 18 of the synchronous cylinder 4 are separated from one another. If hydraulic oil is to be conveyed into the pressure chamber 17 in this case in order to displace the piston 9 further towards the second end 15 of the housing 8, hydraulic oil is supplied to the pressure chamber 17 via the hydraulic line 23 and the check valve 25, specifically with a defined pressure. 3, the check valve 26 is coupled to the hydraulic line 23 via a pilot line 31, which causes the check valve 26 to open, so that when oil is supplied to the pressure chamber 17 when the pressure chambers 17, 18 are separate, one to discharge correspondingly the same amount of oil from the pressure chamber 18.

If, on the other hand, hydraulic oil is to be supplied to the pressure chamber 18 via the hydraulic line 24 and the check valve 26, the pi

BE2018 / 5392 solder line 32, which branches off from the hydraulic line 24 in the direction of the check valve 25, opens the check valve 25 in order to derive a hydraulic oil volume corresponding to the hydraulic oil volume fed into the pressure chamber 18 from the pressure chamber 17.

As already stated, the synchronous cylinder 4 can be operated not only in the switching position of the switching device 21 shown in FIG. 3 with separate pressure chambers 17, 18, but rather also in a second switching position of the switching device 21, in which the two pressure chambers 17, 18 of the synchronizing cylinder 4 are coupled to one another, in which case a free transverse compensation movement of the attachment 3 is possible.

Then, when the switching device 21 is transferred from the first switching position shown in FIG. 3 against the spring force of a spring element 33 into the second switching position, the two pressure chambers 17, 18 are coupled to one another, specifically via branches 34, 35 from the hydraulic lines 23 , 24, which branch off downstream of the check valves 25, 26 from the respective hydraulic line 23, 24.

Then, when the synchronous cylinder 4 is operated in the first operating situation or in the first operating mode with separate pressure chambers 17, 18, it serves in particular to provide a cutting height control in order to control or to control the pendulum movement 5 of the front attachment 3 depending on the measurement signals of the bottom buttons 7 regulate.

On the other hand, when the synchronous cylinder 4 is operated with coupled pressure chambers 17, 18 in the second operating situation or in the second operating mode, a free oscillating movement of the attachment 3 can be guaranteed to provide a so-called ground pressure control, in particular to push the soil to be worked on over the Avoid attachment 3.

BE2018 / 5392

FIG. 3 also shows an actuator 36 for actuating the switching device 21. This can be a magnet, for example, in order to displace the switching device 21 against the spring force of the spring element 33. It is possible to actuate the switching device 21 manually or automatically using the actuator 36. When the switching device 21 is actuated manually, a driver of the harvesting vehicle can then decide for himself whether the transverse compensation cylinder 4, which is preferably designed as a synchronous cylinder, should be operated in the first operating situation or the second operating situation.

Automatic actuation of the switching device 21 is preferred in order to automatically transfer the transverse compensation cylinder 4 between the two operating situations or operating modes. It is then provided in particular that the switching device 21 is actuated automatically as a function of the ground pressure of a ground pressure control. Then, when the ground pressure of the ground pressure control is less than a limit value, the switching device 21 automatically assumes the first switching position in order to separate the two pressure chambers 17, 18 of the synchronous cylinder 4 from one another and to regulate the pendulum movement 5. On the other hand, when the ground pressure of the ground pressure control is greater than the limit value, the switching device 21 assumes the second switching position in order to then couple the pressure chambers 17, 18 with one another to ensure the free transverse compensation movement of the front attachment 3.

For the automatic switchover to the second operating mode, a floor pressure is preferably selected in which at least one skid or a sliding element touches or almost touches the floor.

Then, when the transverse compensation cylinder 4, which is preferably designed as a synchronous cylinder, is operated in the first switching position or in the first operating mode in the switching device 21 in the first switching position, the pressure limiting valves 27, 28 can be used

BE2018 / 5392

Damage to the front attachment as a result of excessive pressure, which can be applied to the transverse compensation cylinder 4, for example when driving over a bump, can be avoided. If, for example, an excessive pressure builds up in one of the pressure chambers 17, 18 of the transverse compensation cylinder 4 when driving over a bump, then this pressure is also present at the respective pressure relief valve 27, 28, then the respective pressure relief valve 27, 28 can be opened, to ensure pressure relief in the respective pressure chamber 17, 18. In this case, hydraulic oil can then flow through the respective bypass line 29, 30 and the respective pressure relief valve 27, 28 then opened, namely in the direction of the respective other pressure chamber on the cross-compensation cylinder, in particular synchronous cylinder 4, and / or in the direction of a hydraulic oil tank, not shown ,

The present invention accordingly proposes to operate the transverse compensation cylinder 4 of an attachment in two different operating situations, namely in a first operating situation with separate pressure chambers 17, 18 and in a second operating situation with coupled pressure chambers 17, 18. In the first operating situation with separate ones Pressure chambers 17, 18 can be actively controlled, in particular, via signals provided by floor sensors 7 or comparable sensors, the pendulum movement 5 of the attachment 3. This serves in particular to control the cutting height. In the second operating situation with coupled pressure chambers 17, 18, a free pendulum movement without restoring forces is possible. This serves in particular to provide ground pressure control. The switching between the first operating situation and the second operating situation is preferably carried out automatically via a switching device 21, specifically depending on the ground pressure of the ground pressure control. In the case of a ground pressure control, unevenness in the floor is via sliding block

BE2018 / 5392 fen, which can then be compensated via a free cross-compensation movement without restoring forces.

If the cross-compensation cylinder 4 is designed as a double-acting cylinder, this becomes for the free cross-compensation movement of the second

Operating mode 'switched into a so-called floating position, in which the hydraulic fluid can flow in or out through open valves in both pressure chambers of the cylinder.

According to an advantageous development of the invention, flow damping elements, such as throttles, can be integrated into the corresponding hydraulic lines in order to dampen the pendulum movement of the transverse compensation cylinder 4 or of the front attachment 3.

BE2018 / 5392

LIST OF REFERENCE NUMBERS

harvester

carrier vehicle

header

Cross-compensation cylinder

Cross compensation movement, pendulum movement

axis

ground sensors

casing

piston

piston rod

piston rod

piston area

piston area

page

page

extension

pressure chamber

pressure chamber

fastening eye

fastening eye

switching device

hydraulic module

hydraulic line

hydraulic line

check valve

check valve

Pressure relief valve

Pressure relief valve

bypass line

bypass line

pilot line

pilot line

spring element

diversion

BE2018 / 5392

diversion

actuator

BE2018 / 5392

Claims (12)

claims 1. attachment (3) of an agricultural harvesting vehicle, with a transverse compensation control device comprising a transverse compensation cylinder (4), characterized in that the transverse compensation cylinder (4) via a switching device (21) between a first operating situation in which it controls or regulates a predetermined transverse compensation movement of the front attachment (3), and a second operating situation in which it serves to provide a free transverse compensation movement of the front attachment (3) can be transferred. 2. Attachment device according to claim 1, characterized in that the switching device (21) is automatically operable depending on the ground pressure of a ground pressure control such that when the ground pressure of the ground pressure control is less than a limit value, the switching device (21) automatically assumes the first switching position , and that when the ground pressure of the ground pressure control is greater than the limit value, the switching device (21) automatically assumes the second switching position. 3. Front attachment according to claim 1, characterized in that the switching device (21) can be actuated manually in order to transfer the transverse compensation cylinder (4) between the first and second operating situation. 4. Attachment device according to one of claims 1 to 3, characterized in that the transverse compensation cylinder (4) is designed as a synchronous cylinder or by two single-acting cylinders or as a double-acting cylinder. BE2018 / 5392 5. attachment according to claim 4, characterized in that the switching device (21) in a first switching position to provide the first operating situation separates pressure chambers (17, 18) of the synchronous cylinder (4) from each other, the switching device (21) in a second switching position to provide the second operating situation, the pressure chambers (17, 18) of the synchronous cylinder (4) couples together. 6. attachment according to claim 5, characterized in that each pressure chamber (17, 18) of the synchronous cylinder (4) via a hydraulic line (23, 24), in each of which a check valve (25, 26) is integrated, can be supplied with hydraulic oil , 7. Attachment device according to claim 6, characterized in that the switching device (21) in the first switching position separates the hydraulic lines (23, 24) downstream of the check valves (25, 26), the switching device (21) in the second switching position the hydraulic lines (23 , 24) connects downstream of the check valves (25, 26). 8. attachment according to one of the preceding claims, characterized in that the switching device (21) is designed as a 2/2-way valve. 9. Attachment device according to one of claims 6 to 8, characterized in that each hydraulic line (23, 24) has a bypass line (29, 30) connected in parallel to the respective check valve (25, 26), into each of which a pressure relief valve (27, 28 ) is integrated, the respective pressure relief valve (27, 28) opens automatically when, in the first operating situation, a pressure at the respective pressure relief valve (27, 28) exceeds a limit value, BE2018 / 5392, hydraulic oil then starting from the pressure chamber (17, 18) in which the pressure above the limit value prevails, via the bypass line (23, 24) with the opened pressure relief valve (27, 28) into the respective other pressure chamber (17 , 18) of the synchronous cylinder and / or into a hydraulic oil tank in which there is a pressure below the limit. 10. Attachment device according to one of claims 4 to 9, characterized in that the synchronous cylinder (4) has a piston (9) and on each side of the piston (9) has a piston rod (10, 11), a first piston rod (10) protrudes on a first side of a housing (8) and can be moved out of the housing (8) or can be moved more strongly into the housing (8) on this first side, and wherein a second piston rod (11) on a second side of the housing (8) completely enclosed by the housing (8) and displaceable within the housing (8). 11. Attachment device according to claim 10, characterized in that on a section of the first piston rod (10) projecting from the housing (8) has a first fastening eye (19) of the synchronous cylinder (4) and on the second side of the housing a second fastening eye (20 ) of the synchronous cylinder (4) is formed. 12. Agricultural harvesting vehicle, in particular forage harvester, with an attachment (3) according to one of claims 1 to 11.