DE102018127547B4 - Method for the electrohydraulic alignment of support bodies or trailers - Google Patents

Abstract

Method for the electrohydraulic alignment of a supporting body that is at a standstill by means of lifting supports (V, VL, VR, HL, HR) in a horizontal orientation, whereby the supporting body about two swivel axes (V, VL, VR, HL, HR) is adjusted ( 10, 20) can be inclined in two different planes with respect to a horizontal orientation, the jacks (V, VL, VR, HL, HR) being actuated for retraction and / or extension by a reversible hydraulic unit (6), which is operated by a control unit comprising a computer unit is controlled computer-controlled, and wherein data on the respective inclination of the support body about the two pivot axes (10, 20) with respect to the horizontal orientation are recorded by at least one inclination sensor (15, 25) and transmitted to the control unit based on the transmitted data generated control signals, by means of which the jacks (V, VL, VR, HL, HR) for the horizontal alignment of the support body a ncontrolled, characterized by the following method steps: - at least one first lifting support (V, VL, VR), which is arranged with respect to the first pivot axis (10) on a first side of the support body, is extended at least until the first inclination sensor (15) a Change in the inclination of the support body about the first pivot axis (10) is detected, - at least one second lifting support (HL, HR), which is opposite the at least one first lifting support (V, VL, VR) with respect to the first pivot axis (10), is at least so far extended until the first inclination sensor (15) detects a change in the inclination of the support body about the first pivot axis (10) in the opposite pivoting direction, - if the first inclination sensor (15) then detects an orientation of the support body that is relative to the first pivot axis (10 ) deviates from a horizontal alignment of the supporting body, the at least one first jack (V, VL, VR) or the at least one second jack (HL, HR), which is arranged on the area that is lower with respect to the first pivot axis (10), extended until the first inclination sensor (15) detects a horizontal alignment of the support body with respect to the first pivot axis (10), - at least one first lifting support (VL, HL), which is arranged on a first side of the support body with respect to the second pivot axis (20), is extended at least until the second inclination sensor (25) detects a change in the inclination of the support body about the second pivot axis (20) - at least one second lifting support (VR, HR), which is opposite the at least one first lifting support (VL, HL) with respect to the second pivot axis (20), is extended at least until the second inclination sensor (25) changes the inclination of the support body about the second pivot axis (20) detected in the opposite pivoting direction, - if the second inclination sensor (25) then detects an orientation of the support body that is relative to the second The pivot axis (20) deviates from a horizontal alignment of the support body, the at least one first lifting support (VL, HL) or the at least one second lifting support (VR, HR), which is arranged on the area lower than the second pivot axis (20), extended until the second inclination sensor (25) detects a horizontal alignment of the support body with respect to the second pivot axis (20).

Description

According to the preamble of claim 1 or 2, the present invention relates to a method for the electrohydraulic alignment of a stationary support body or a vehicle trailer coupled to a towing vehicle, carried out by means of jacks, into a horizontal orientation.

A support body can be not just a vehicle or a vehicle body, but any body that is suitable for alignment using jacks. Truck semitrailers or caravans that are to be aligned horizontally after being uncoupled from the towing vehicle are particularly suitable as vehicle trailers. A horizontal alignment of a support body or vehicle trailer in the context of this application is understood to mean the positioning of a base surface of the support body or the vehicle trailer in a horizontal plane running perpendicular to the perpendicular direction.

In addition to manually operated, purely mechanically acting supports, which are used in particular to align caravans, there are also known systems with hydraulic supports that are individually controlled manually, which takes a correspondingly long time and is relatively imprecise with regard to an exactly horizontal alignment.

When executing the present method according to the invention, both the support body and the vehicle trailer can be tilted by adjusting the jacks in two different vertical planes about a pivot axis in relation to a horizontal orientation, the jacks being hydraulically connected to a reversible hydraulic unit which is driven by an electric motor and from which they can be actuated in the retraction direction or in the extension direction depending on the direction of rotation of the electric motor. The electric motor of the reversible hydraulic unit is electrically connected to a control unit comprising a computer unit, which in this way can control the hydraulic unit in a computer-controlled manner. In this case, data on the respective inclination of the supporting body or vehicle trailer about the two pivot axes with respect to the horizontal alignment are recorded by at least one inclination sensor and transmitted electronically via a wired or wireless transmission link to the control unit, which then generates control signals based on the transmitted data. by means of which the jacks are controlled for the horizontal alignment of the support body.

From the DE 202 21 594 U1 a support system for vehicles with jacks operated by hydraulic cylinders is known, with each of the four sides of the vehicle being assigned at least two jacks, and wherein the hydraulic cylinders of the jacks assigned to one side of the vehicle can be acted upon together.

From the DE 40 33 761 C1 A method is known for performing a leveling process by means of hydraulic support cylinders, in which the prevailing pressure is recorded in each cylinder and, when a pressure increase in a support cylinder is determined that exceeds a predetermined threshold value, a pressure signal is generated for the support cylinder, on the basis of which the further supply of the support cylinder in question is generated Hydraulic fluid is prevented by the control logic.

From the DE 195 25 673 C1 a method for level control of work equipment that works fully automatically by means of electronic data processing is known, in which an original inclination is measured as the actual level using a pendulum potentiometer, compared with a predetermined target level and then the work device is stabilized on the ground by extending hydraulic supports is leveled horizontally and vertically. At the end of the leveling process, the ground pressure of the supports is measured.

From the DE 10 2007 030 107 B4 a method and a system for the electrohydraulic alignment of support bodies that are at a standstill by means of hydraulic jacks are known, each of which is controlled via its own multi-way valve. In addition, each jack can each have a pressure switch for determining contact with the ground.

The control of the jacks via several multi-way valves as well as the use of pressure switches or pressure sensors to record the ground pressure of the supports or to record hydraulic operating pressures in the support cylinders is associated with a relatively large amount of effort and correspondingly high costs. In addition, a pressure-dependent system can only provide usable results in connection with measurable pressures, which is not guaranteed if an object to be leveled is light.

The object of the present invention is therefore to provide a method of the type mentioned at the outset which, when the jacks are in safe contact with the ground, enables support bodies or vehicle trailers to be aligned horizontally in a particularly simple and cost-effective manner neither multi-way valves nor pressure sensors are required for this.

According to the invention, this object is achieved for a support body by a method according to claim 1 and for a vehicle trailer by a method according to claim 2. Advantageous refinements and expedient developments of the invention emerge from the dependent claims.

• - mindestens eine erste Hubstütze, die bezüglich der ersten Schwenkachse auf einer ersten Seite des Tragkörpers angeordnet ist, wird zumindest soweit ausgefahren, bis der erste Neigungssensor eine Veränderung der Neigung des Tragkörpers um die erste Schwenkachse erfasst,
• - mindestens eine zweite Hubstütze, die der mindestens einen ersten Hubstütze bezüglich der ersten Schwenkachse gegenüberliegt, wird zumindest soweit ausgefahren, bis der erste Neigungssensor eine Veränderung der Neigung des Tragkörpers um die erste Schwenkachse in der entgegengesetzten Schwenkrichtung erfasst,
• - falls der erste Neigungssensor dann eine Ausrichtung des Tragkörpers erfasst, die bezüglich der ersten Schwenkachse von einer horizontalen Ausrichtung des Tragkörpers abweicht, wird die mindestens eine erste Hubstütze oder die mindestens eine zweite Hubstütze, die an dem bezüglich der ersten Schwenkachse tiefergelegenen Bereich angeordnet ist, soweit ausgefahren, bis der erste Neigungssensor bezüglich der ersten Schwenkachse eine horizontale Ausrichtung des Tragkörpers erfasst,
• - mindestens eine erste Hubstütze, die bezüglich der zweiten Schwenkachse auf einer ersten Seite des Tragkörpers angeordnet ist, wird zumindest soweit ausgefahren, bis der zweite Neigungssensor eine Veränderung der Neigung des Tragkörpers um die zweite Schwenkachse erfasst,
• - mindestens eine zweite Hubstütze, die der mindestens einen ersten Hubstütze bezüglich der zweiten Schwenkachse gegenüberliegt, wird zumindest soweit ausgefahren, bis der zweite Neigungssensor eine Veränderung der Neigung des Tragkörpers um die zweite Schwenkachse in der entgegengesetzten Schwenkrichtung erfasst,
• - falls der zweite Neigungssensor dann eine Ausrichtung des Tragkörpers erfasst, die bezüglich der zweiten Schwenkachse von einer horizontalen Ausrichtung des Tragkörpers abweicht, wird die mindestens eine erste Hubstütze oder die mindestens eine zweite Hubstütze, die an dem bezüglich der zweiten Schwenkachse tiefergelegenen Bereich angeordnet ist, soweit ausgefahren, bis der zweite Neigungssensor bezüglich der zweiten Schwenkachse eine horizontale Ausrichtung des Tragkörpers erfasst.

The solution according to the invention provides for a support body according to claim 1 that the method comprises the following method steps:

• - At least one first jack, which is arranged on a first side of the support body with respect to the first pivot axis, is extended at least until the first inclination sensor detects a change in the inclination of the support body about the first pivot axis,
• - At least one second support, which is opposite the at least one first support with respect to the first pivot axis, is extended at least until the first inclination sensor detects a change in the inclination of the support body about the first pivot axis in the opposite pivot direction,
• - If the first inclination sensor then detects an orientation of the support body that deviates from a horizontal orientation of the support body with respect to the first pivot axis, the at least one first lifting support or the at least one second lifting support, which is arranged on the area lower than the first pivot axis, is extended until the first inclination sensor detects a horizontal alignment of the support body with respect to the first pivot axis,
• - At least one first lifting support, which is arranged on a first side of the support body with respect to the second pivot axis, is extended at least until the second inclination sensor detects a change in the inclination of the support body about the second pivot axis,
• - At least one second jack, which is opposite the at least one first jack with respect to the second pivot axis, is extended at least until the second inclination sensor detects a change in the inclination of the support body about the second pivot axis in the opposite pivoting direction,
• - If the second inclination sensor then detects an orientation of the support body which deviates from a horizontal orientation of the support body with respect to the second pivot axis, the at least one first lifting support or the at least one second lifting support, which is arranged on the area lower than the second pivot axis, is extended until the second inclination sensor detects a horizontal alignment of the support body with respect to the second pivot axis.

• - mindestens eine vordere Hubstütze, die bezüglich der ersten Schwenkachse in einem vorderen Bereich des Anhängers angeordnet ist, wird zumindest soweit ausgefahren, bis der vordere Bereich des Anhängers soweit angehoben ist, dass der Anhänger durch Vorfahren des Zugfahrzeugs von diesem abgekoppelt werden kann,
• - nach dem Abkoppeln des Anhängers wird mindestens eine erste Hubstütze, die bezüglich der zweiten Schwenkachse auf einer ersten Seite des Anhängers angeordnet ist, zumindest soweit ausgefahren, bis der zweite Neigungssensor eine Veränderung der Neigung des Anhängerchassis um die zweite Schwenkachse erfasst,
• - mindestens eine zweite Hubstütze, die der mindestens einen ersten Hubstütze bezüglich der zweiten Schwenkachse gegenüberliegt, wird zumindest soweit ausgefahren, bis der zweite Neigungssensor eine Veränderung der Neigung des Anhängerchassis um die zweite Schwenkachse in der entgegengesetzten Schwenkrichtung erfasst,
• - falls der zweite Neigungssensor dann eine Ausrichtung des Anhängerchassis erfasst, die bezüglich der zweiten Schwenkachse von einer horizontalen Ausrichtung des Anhängerchassis abweicht, wird die mindestens eine erste Hubstütze oder die mindestens eine zweite Hubstütze, die an dem bezüglich der zweiten Schwenkachse tiefergelegenen Bereich angeordnet ist, soweit ausgefahren, bis der zweite Neigungssensor bezüglich der zweiten Schwenkachse eine horizontale Ausrichtung des Anhängerchassis erfasst,
• - nachdem der zweite Neigungssensor eine horizontale Ausrichtung des Anhängerchassis um die zweite Schwenkachse erfasst hat wird die mindestens eine vordere Hubstütze soweit eingefahren oder ausgefahren, bis der erste Neigungssensor bezüglich der ersten Schwenkachse eine horizontale Ausrichtung des Anhängerchassis erfasst.

For a vehicle trailer, the solution according to the invention according to claim 2 provides that the method comprises the following method steps:

• - At least one front support, which is arranged in a front area of the trailer with respect to the first pivot axis, is extended at least until the front area of the trailer is raised so far that the trailer can be uncoupled from the towing vehicle by driving forward,
• - After uncoupling the trailer, at least one first jack, which is arranged on a first side of the trailer with respect to the second pivot axis, is extended at least until the second inclination sensor detects a change in the inclination of the trailer chassis about the second pivot axis,
• - At least one second jack, which is opposite the at least one first jack with respect to the second pivot axis, is extended at least until the second inclination sensor detects a change in the inclination of the trailer chassis about the second pivot axis in the opposite pivoting direction,
• - If the second inclination sensor then detects an orientation of the trailer chassis that deviates from a horizontal orientation of the trailer chassis with respect to the second pivot axis, the at least one first lifting support or the at least one second lifting support, which is arranged on the area lower than the second pivot axis, is extended until the second inclination sensor detects a horizontal alignment of the trailer chassis with respect to the second pivot axis,
• - After the second inclination sensor has detected a horizontal alignment of the trailer chassis around the second pivot axis, the at least one front jack is retracted or extended until the first inclination sensor detects a horizontal alignment of the trailer chassis with respect to the first pivot axis.

In both methods, it is essential that, apart from the first method step carried out on a vehicle trailer for ending an extension movement of a lifting support, only the signals supplied by an inclination sensor are evaluated. The methods each take advantage of the fact that a change in the inclination about the first or the second pivot axis when extending jack supports can only take place when the extending jack has touched the ground.

A considerable advantage here is that when a lifting support is extended, neither pressure sensors nor pressure switches are required to determine an end point and, nevertheless, sufficient ground contact of the lifting supports can be determined with certainty. The inclination sensors required for this are also required in conventional automatic methods for horizontal alignment and are therefore available anyway. Since no pressures have to be recorded for this, the method according to the invention can also be used reliably in the case of supporting bodies and vehicle trailers with only low weight.

Another advantage is that no complex multi-way valves are required to control the jacks, but only much simpler and more weight-saving safety valves or shut-off valves in order to be able to control the jacks in the desired manner.

The method according to the invention therefore allows a particularly simple and yet stable horizontal alignment of supporting bodies and vehicle trailers, which can be achieved particularly cost-effectively without multi-way valves and without pressure sensors or pressure switches.

In the method proposed for a vehicle trailer, it is particularly advantageous if, after uncoupling the trailer and before horizontally aligning the trailer chassis around the second pivot axis, the at least one front jack is retracted at least until the first inclination sensor aligns with the first pivot axis of the trailer chassis where the front area of the trailer is lower than the rear area of the trailer. In this way, an unnecessarily high support of the trailer can be avoided, which ensures greater comfort when entering the trailer.

The equipment options listed below are advantageous for both support bodies and vehicle trailers.

It is particularly advantageous if the two pivot axes run in a common plane, which preferably runs parallel to the base surface of the support body or vehicle trailer that is to be aligned horizontally.

A particularly simple horizontal alignment can be achieved in that the two pivot axes run perpendicular to one another in the common plane.

In the case of a vehicle or vehicle trailer, it is also particularly advantageous for simple implementation if the first pivot axis runs parallel to at least one wheel axis of the vehicle or trailer.

For easy extension and retraction of the jacks, it is advantageous if they each include a double-acting hydraulic cylinder.

It is particularly advantageous if a shut-off valve is inserted between each hydraulic cylinder and the hydraulic unit common to all hydraulic cylinders, which shut-off valve also serves as a safety valve to maintain the alignment after reaching the horizontal alignment. A shut-off valve is significantly more cost-effective and more weight-saving than a multi-way valve, which should be avoided for controlling the jacks in the method according to the invention. As an alternative to this, it is also conceivable that the hydraulic cylinder of each lifting support has its own reversible hydraulic unit for its actuation.

A particularly safe and space-saving design can be achieved in that the shut-off valves are integrated in the base of the respective hydraulic cylinder.

According to a first advantageous embodiment of the invention, three lifting supports are provided on the support body or the trailer, one lifting support being arranged in a front area and one lifting support in each case on each of the two sides of a rear area of the supporting body or trailer.

According to an alternative advantageous embodiment of the invention, four lifting supports can also be provided on the support body or the trailer, with one lifting support being arranged on each of the two sides of a front area and a rear area of the support body or trailer.

The method according to the invention enables a computer-controlled or automatic horizontal alignment of supporting bodies or vehicle trailers, which ensures safe ground contact of the jacks.

Further advantages and features of the invention emerge from the following description and the exemplary embodiments shown in the drawings.

• 1: schematische Darstellung eines Wohnwagen-Chassis, das zur Durchführung des erfindungsgemäßen Verfahrens eingerichtet ist,
• 2: schematische Darstellung eines LKW-Auflieger-Chassis, das zur Durchführung des erfindungsgemäßen Verfahrens eingerichtet ist, und
• 3: Hydraulikschaltplan für das Wohnwagen-Chassis aus 1.

Show it:

• 1 : a schematic representation of a caravan chassis which is set up to carry out the method according to the invention,
• 2 : A schematic representation of a truck semitrailer chassis which is set up to carry out the method according to the invention, and
• 3 : Hydraulic circuit diagram for the caravan chassis 1 .

This in 1 shown trailer chassis 1 a caravan trailer points behind the coupling device 2 a front prop V and behind the wheels 3 a rear prop HL on the left side L. as well as a rear support MR on the right side R. on. The jacks HL and MR are mounted below the trailer floor and can, for example, be of the type described in the applicant's earlier patent application No. 10 2017 124 198.1, to which reference is made in this respect. Each jack includes a double-acting hydraulic cylinder, by means of which it is extended downwards against the ground or upwards against the trailer chassis 1 can be retracted.

According to 3 become the three hydraulic cylinders 41 , 42 and 43 via hydraulic lines 5a and 5b to a reversible hydraulic unit 6th connected, which by one of an electric motor 7th driven hydraulic pump 8th is formed. By reversing the direction of rotation of the electric motor 7th can change the direction of flow of the hydraulic pump 8th be reversed. This enables a particularly simple hydraulic circuit structure in which no multi-way valves are required for extending and retracting the hydraulic cylinders. The two pressure connections of the hydraulic cylinders 41 , 42 and 43 are only here via a simple ring line with the hydraulic pump 8th connected, whereby both line branches to the hydraulic cylinders are divided into three lines each. For every hydraulic cylinder 41 , 42 and 43 each is a shut-off valve 91 , 92 or. 93 interposed in a branch. By activating the shut-off valves individually 91 , 92 or. 93 by a control unit (not shown here) for each hydraulic cylinder 41 , 42 or. 43 and thus also the corresponding jack V , HL or. MR can be operated in a targeted manner. The shut-off valves 91 , 92 and 93 can also serve as safety valves to block the hydraulic cylinders or the jacks when the hydraulic unit is switched off.

• Ausgehend von dem an ein Zugfahrzeug angekoppelten Zustand wird bei Stillstand des Anhängers zunächst die vordere Hubstütze V soweit nach unten ausgefahren, bis die Kupplungsvorrichtung 2 am vorderen Ende des Anhängers soweit angehoben ist, dass der Anhänger durch Vorfahren des Zugfahrzeugs von diesem abgekoppelt werden kann. Die vordere Hubstütze V hat dabei einen sicheren Kontakt zum Untergrund.

The three jacks V , HL and MR are used by the trailer chassis 1 to bring the formed base area of the trailer and thus also the entire caravan trailer into a horizontal orientation. For this purpose, the trailer can be extended or retracted by one or more jacks about two different pivot axes 10 and 20th be inclined. The swivel axes 10 and 20th are aligned perpendicular to each other, with the first pivot axis 10 parallel to that of the two wheels 3 bearing wheel axle 30th runs, whereas the second pivot axis 20th perpendicular to the wheel axis 30th and by the coupling device 2 runs. The slope of the trailer chassis 1 compared to a horizontal or horizontal plane about these two pivot axes 10 and 20th is made by two tilt sensors 15th and 25th detected. The first tilt sensor 15th detects the forward or rearward inclination of the trailer chassis 1 with respect to the first pivot axis 10 while the second tilt sensor 25th the lateral inclination of the trailer chassis 1 with respect to the second pivot axis 20th detected. The data on the inclination of the trailer determined in this way are electronically transmitted to the control unit, which uses this inclination data to generate control signals by means of which the jack supports V , HL and MR for horizontal alignment of the trailer chassis 1 can be controlled as follows:

• Starting from the state coupled to a towing vehicle, when the trailer is at a standstill, the front support is initially activated V extended downwards until the coupling device 2 at the front end of the trailer is raised to such an extent that the trailer can be uncoupled from the towing vehicle by driving it forward. The front support V has a secure contact with the ground.

Then the left jack HL relating to the second pivot axis 20th on the left L. of the trailer is arranged so far extended until the second inclination sensor 25th a change in the inclination of the trailer chassis 1 around the second pivot axis 20th detected. This ensures that the left jack also HL certainly touched down on the ground.

Then the right jack MR that of the left jack HL with respect to the second pivot axis 20th opposite, extended until the second inclination sensor 25th another change in the inclination of the trailer chassis 1 around the second pivot axis 20th detected. This change in inclination, which now takes place in the opposite pivoting direction, ensures that the right lifting support also MR touched down on the ground.

If the second tilt sensor 25th then a horizontal or horizontal alignment of the trailer chassis 1 need the two side jacks HL and MR no longer to be actuated for a further change in inclination. But if the second inclination sensor 25th after placing the right jack MR a slope value of the trailer chassis on the ground 1 detected with respect to the second pivot axis 20th that deviates from a horizontal alignment of the trailer chassis, becomes that jack HL or MR on the relative to the second pivot axis 20th lower side L. or R. is arranged, extended even further, until the second inclination sensor 25th with respect to the second pivot axis 20th a horizontal alignment of the trailer chassis 1 notices.

Finally, the front jack is also needed V retracted or extended until the first inclination sensor 15th with respect to the first pivot axis 10 a horizontal alignment of the trailer chassis 1 detected. Then there is the trailer chassis 1 and thus the entire caravan in the desired horizontal orientation. At the same time, there is safe ground contact for all three jacks V , HL and MR guaranteed without the detection of hydraulic operating pressures in the hydraulic cylinders 41 , 42 or 43 or of pressure values at the foot areas of the jack stands that touch the ground. Also, no complex multi-way valves are required for the hydraulic circuit structure.

The in 2 shown trailer chassis 1 of a truck trailer, two separately controllable front jacks are provided in the front area, namely a front left jack VL on the left side L. as well as a front right jack VR on the right side R. . Together with the rear left support HL and the rear right support MR has the truck-semitrailer-trailer chassis 1 thus a total of four jacks.

Two jacks lying next to one another are operated in pairs to enable the trailer chassis to pivot 1 to achieve. For example, this corresponds to a common actuation of the two front jacks VL and VR the corresponding actuation of the single front support V at the in 1 shown caravan chassis 1 to change the inclination with respect to the first pivot axis 10 to effect. A joint actuation of the two left jacks also causes VL and HL or the two right jacks VR and MR a lateral inclination of the truck-semitrailer-trailer chassis 1 around the second pivot axis 20th . The inventive method for achieving a horizontal alignment of the trailer chassis 1 and thus also the entire truck trailer can therefore be carried out in exactly the same way as was previously done for the in 1 depicted caravan has been described.

List of reference symbols

1

Trailer chassis

2

Coupling device

3

bikes

5a

hydraulic line

5b

hydraulic line

6th

Hydraulic power pack

7th

Electric motor

8th

hydraulic pump

10

first pivot axis

15th

first tilt sensor

20th

second pivot axis

25th

second tilt sensor

30th

Wheel axle

41

Hydraulic cylinder

42

Hydraulic cylinder

43

Hydraulic cylinder

91

Shut-off valve

92

Shut-off valve

93

Shut-off valve

HL

rear support leg on the left

MR

rear jack on the right

L.

left side

R.

right side

V

front support

VL

front support leg on the left

VR

front support right

Claims (11)

Method for the electrohydraulic alignment of a supporting body that is at a standstill by means of lifting supports (V, VL, VR, HL, HR) in a horizontal orientation, whereby the supporting body about two swivel axes by adjusting the lifting supports (V, VL, VR, HL, HR) (10, 20) can be inclined in two different planes with respect to a horizontal orientation, the jacks (V, VL, VR, HL, HR) being actuated for retraction and / or extension by a reversible hydraulic unit (6), which is controlled computer-controlled by a control unit comprising a computer unit, and wherein data on the respective inclination of the support body about the two pivot axes (10, 20) with respect to the horizontal alignment are recorded by at least one inclination sensor (15, 25) and transmitted to the control unit, which generates control signals based on the transmitted data, by means of which the jacks (V, VL, VR, HL, HR) are controlled for the horizontal alignment of the supporting body, characterized by the following process steps: - at least one first jack (V, VL, VR), the is arranged with respect to the first pivot axis (10) on a first side of the support body, is extended at least until the e rste inclination sensor (15) detects a change in the inclination of the support body about the first pivot axis (10), - at least one second lifting support (HL, HR) that of the at least one first lifting support (V, VL, VR) with respect to the first pivot axis (10 ) is opposite, is extended at least until the first inclination sensor (15) detects a change in the inclination of the support body about the first pivot axis (10) in the opposite pivoting direction, - if the first inclination sensor (15) then detects an orientation of the support body which with respect to the first pivot axis (10) deviates from a horizontal alignment of the support body, the at least one first lifting support (V, VL, VR) or the at least one second lifting support (HL, HR), which is attached to the with respect to the first pivot axis (10) is arranged in the lower region, extended until the first inclination sensor (15) detects a horizontal alignment of the support body with respect to the first pivot axis (10) - at least ns a first lifting support (VL, HL), which is arranged on a first side of the support body with respect to the second pivot axis (20), is extended at least until the second inclination sensor (25) shows a change in the inclination of the support body about the second pivot axis ( 20) detected, - at least one second support (VR, HR), which is opposite the at least one first support (VL, HL) with respect to the second pivot axis (20), is extended at least until the second inclination sensor (25) a change in the Inclination of the support body about the second pivot axis (20) detected in the opposite pivoting direction, - if the second inclination sensor (25) then detects an orientation of the support body which with respect to the second pivot axis (20) deviates from a horizontal orientation of the support body, the at least one first lifting support (VL, HL) or the at least one second lifting support (VR, HR), which is located on the area lower than the second pivot axis (20) is arranged, extended until the second inclination sensor (25) detects a horizontal alignment of the support body with respect to the second pivot axis (20). Method for the electrohydraulic alignment of a vehicle trailer that is at a standstill and coupled to a towing vehicle by means of jacks (V, VL, VR, HL, HR) in a horizontal alignment of the trailer chassis (1), whereby by adjusting the jacks (V, VL, VR, HL, HR) the trailer can be tilted about two pivot axes (10, 20) in two different planes with respect to a horizontal orientation of the trailer chassis (1), the jacks (V, VL, VR, HL, HR) for input and / or extension can be actuated by a reversible hydraulic unit (6), which is controlled by a computer-controlled control unit comprising a computer unit, and with data on the respective inclination of the trailer chassis (1) about the two pivot axes (10, 20) relative to the horizontal orientation at least one inclination sensor (15, 25) are detected and transmitted to a control unit, which generates control signals based on the transmitted data ugt, by means of which the jacks (V, VL, VR, HL, HR) are controlled for the horizontal alignment of the trailer chassis (1), characterized by the following process steps: - at least one front jack (V, VL, VR), which with respect to the first Pivot axis (10) is arranged in a front area of the trailer, is extended at least until the front area of the trailer is raised to such an extent that the trailer can be uncoupled from the towing vehicle by moving it forwards, - after uncoupling the trailer, at least one first lifting support (VL, HL), which is arranged on a first side of the trailer with respect to the second pivot axis (20), at least extended until the second inclination sensor (25) changes the inclination of the trailer chassis (1) about the second pivot axis ( 20), - at least one second lifting support (VR, HR) which is opposite the at least one first lifting support (VL, HL) with respect to the second pivot axis (20), w is extended at least until the second inclination sensor (25) detects a change in the inclination of the trailer chassis (1) about the second pivot axis (20) in the opposite pivoting direction, - if the second inclination sensor (25) then aligns the trailer chassis (1) detected, which deviates from a horizontal orientation of the trailer chassis (1) with respect to the second pivot axis (20), the at least one first lifting support (VL, HL) or the at least one second lifting support (VR, HR) attached to the one with respect to the second Pivot axis (20) is located in the lower area, extended until the second inclination sensor (25) detects a horizontal alignment of the trailer chassis (1) with respect to the second pivot axis (20), - after the second inclination sensor (25) has a horizontal alignment of the trailer chassis ( 1) has detected about the second pivot axis (20), the at least one front support (V, VL, VR) is retracted or extended until the e The first inclination sensor (15) detects a horizontal alignment of the trailer chassis (1) with respect to the first pivot axis (10). Procedure according to Claim 2 , characterized in that after the trailer is uncoupled and before the trailer chassis (1) is horizontally aligned about the second pivot axis (20), the at least one front support (V, VL, VR) is retracted at least until the first inclination sensor (15 ) with respect to the first pivot axis (10) detects an orientation of the trailer chassis (1) in which the front area of the trailer is lower than the rear area of the trailer. Method according to one of the preceding claims, characterized in that the two pivot axes (10, 20) run in a common plane. Procedure according to Claim 4 , characterized in that the two pivot axes (10, 20) run perpendicular to each other. Procedure according to Claim 4 or 5 , characterized in that the first pivot axis (10) runs parallel to at least one wheel axis (30) of the vehicle or trailer. Method according to one of the preceding claims, characterized in that the lifting supports (V, VL, VR, HL, HR) each comprise a double-acting hydraulic cylinder (41, 42, 43). Procedure according to Claim 7 , characterized in that a shut-off valve (91, 92, 93) is interposed between each hydraulic cylinder (41, 42, 43) and the common hydraulic unit (6). Procedure according to Claim 8 , characterized in that the shut-off valves (91, 92, 93) are integrated in the base of the respective hydraulic cylinder (41, 42, 43). Method according to one of the Claims 1 to 9 , characterized in that three jacks (V, HL, HR) are provided on the support body or the trailer, one jack (V) in a front area and one jack (HL, HR) on each of the two sides (L, R) a rear area of the support body or trailer is arranged. Method according to one of the Claims 1 to 9 , characterized in that four jacks (VL, VR, HL, HR) are provided on the support body or the trailer, with one jack (VL, VR, HL, HR) on each of the two sides (L, R) of a front Area and a rear area of the support body or trailer is arranged.

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