EP3867132A1

EP3867132A1 - Lifting device for the translational progressive movement of a motor vehicle

Info

Publication number: EP3867132A1
Application number: EP18808210.1A
Authority: EP
Inventors: Michael Traut
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-16
Filing date: 2018-10-16
Publication date: 2021-08-25
Also published as: CN112805210B; BR112021004928A2; AU2018446093A1; DE112018008074A5; CA3115720A1; US20220024531A1; WO2020078488A1; RU2761007C1; CN112805210A

Abstract

The invention relates to a lifting device (10) for the progressive movement of a motor vehicle, with a support plate (11) which is suitable for the releasable or fixed connection to an underbody of the motor vehicle, and with at least one lifting unit (100) which is provided for raising the motor vehicle from a lowered position, in which the motor vehicle touches down on an underlying surface, into a raised position. The at least one lifting unit (100) is arranged on a main sliding plate (12), wherein the main sliding plate (12) and the support plate (11) are interconnected movably relative to each other in a sliding plane (x-y) such that, in the raised position, owing to a relative movement between the support plate (11) and the main sliding plate (12,) the support plate (11) is movable with the motor vehicle relative to the underlying surface in the sliding plane (x-y), and, in the lowered position, the main sliding plate (12) is movable with the at least one lifting unit (100) relative to the underlying surface in the sliding plane (x-y).

Description

Lifting device for the translational movement of a motor vehicle

The invention relates to a lifting device for locomotion of a motor vehicle, with a carrier plate which is suitable for detachable or fixed connection to a vehicle underbody of the motor vehicle, and at least one lifting unit which is used for lifting the motor vehicle from a lowered position, in which the motor vehicle is on a surface touches down, is provided in a raised position.

The invention also relates to a motor vehicle with such a lifting device and a rotation unit and a locking unit for a lifting device.

Motor vehicles are not only needed in road traffic but also off the beaten track, in open, sometimes rough terrain for the transport of vehicle occupants and / or goods, but also for construction or recovery work and / or for exploring the site. When driving off-road, it can happen that the wheels usually provided for moving the motor vehicle on, for. B. muddy or sandy ground, but also spin on ice or snow due to lack of traction and can no longer move the vehicle. Especially with sand or mud, the wheels of the vehicle can dig into it, which means that locomotion is no longer possible. Another challenge for off-road driving is to overcome obstacles, for example a rise or an edge. Depending on the height of the obstacle, crossing using the conventional wheel drive is not possible at all, or the underbody of the vehicle may touch down when attempting to cross it the motor vehicle is stuck on the obstacle and cannot be moved any further.

Lifting devices for motor vehicles are already known from the prior art, which are intended to free the vehicle from such or a similar state in which the vehicle is stuck in or on the ground. Here, the vehicle is usually moved by means of hydraulic cylinders from the lowered (operating) position, in which the vehicle with its wheels touches the ground and is ready to drive, raised to a raised position in which one, several or all of the wheels no longer touch the ground.

For example, an off-road vehicle is known from DE 26 06 399 A1. H. on the vehicle underbody, hydraulic cylinders designed as lifting cylinders are pivotably arranged, the bearing axes of which extend transversely to the longitudinal direction of the vehicle. The hydraulic cylinders attached to the vehicle are intended to make it possible to move, support and lift the vehicle. The lifting cylinders can be controlled automatically or manually from inside the vehicle. With the device described, however, an actual or complete lifting of the off-road vehicle is not possible, as a result of which obstacles cannot be crossed. It is also necessary for locomotion that the wheels continue to touch the ground and even roll. The lifting cylinder is only used to push the vehicle, making lateral movement impossible.

A support steering device and a running device for a motor vehicle are known from CN 103 434 498. The support steering device comprises a hydraulic cylinder which is pivotally connected at its lower end to a base plate for resting on the ground and at its upper end to a rotary plate arranged on the motor vehicle. As a result, the support steering device, if it is not in use, can be placed against the vehicle underbody and swung out if necessary, the motor vehicle being raised to a raised position in which all four wheels lose contact with the ground. The vehicle can then be turned through 180 ° using the turntable, for example to carry out a “U-turn”. The motor vehicle is additionally equipped with a running device which comprises four separate “feet” which are intended to enable a running movement by pivoting several plates and arms about respective pivot axes connecting them. Such "running" locomotion is on the one hand complicated in terms of control technology and almost impossible to achieve on uneven or smooth ground. Also leads one Movement to a strong rocking of the motor vehicle, which reduces the comfort for the vehicle occupants.

Overall, the devices shown in the prior art are often not very reliable in use or are complicated and expensive to implement, as a result of which in particular the installation space on the vehicle underbody, which is only available to a small extent, is completely taken up and / or strongly influences the ground clearance.

It is therefore an object of the present invention to eliminate the disadvantages of the prior art and to provide a lifting device for locomotion of a motor vehicle, which in particular makes it possible to free the motor vehicle from a stuck state, to overcome obstacles and to further increase the overall maneuverability increase.

The object is achieved by a lifting device according to claim 1, a rotation unit for a lifting device according to claim 16, a locking unit for a lifting device according to claim 17 and a motor vehicle with a lifting device according to claim 18.

A lifting device according to the invention of the type described in the introduction is characterized in that the at least one lifting unit is arranged on a main sliding plate, the main sliding plate and the carrier plate being movable relative to one another in a sliding plane, so that due to a relative movement in the sliding plane between the Carrier plate and the main sliding plate, in the raised position the carrier plate is movable with the motor vehicle relative to the ground in the sliding plane, and in the lowered position the main sliding plate with the at least one lifting unit is movable relative to the ground in the sliding plane.

According to the invention, therefore, a lifting device is provided which can be permanently or releasably connected to the vehicle underbody of a motor vehicle only via a carrier plate. This retrofits a motor vehicle with the lifting device according to the invention enables. Because the connection is designed to be detachable, the lifting device can also be variably assembled and disassembled, if necessary, or can be removed or replaced for repair in the event of a malfunction. The lifting unit intended for lifting the motor vehicle is not arranged directly or directly on the carrier plate, but on a main sliding plate which is aligned essentially parallel to the carrier plate. The main sliding plate and the carrier plate are connected to one another, but are movable or displaceable relative to one another in a sliding plane, ie in a plane parallel to the vehicle underbody and / or parallel to the main sliding plate and the carrier plate itself. The lifting unit in turn is designed to raise and / or lower the motor vehicle perpendicular to the sliding plane. By means of the lifting unit, the motor vehicle can be raised from a lowered position, in which the motor vehicle sits on the ground, into a raised position, or lowered from the raised position into the lowered position. In the raised position, in which the motor vehicle is preferably no longer in contact with the ground, a relative movement between the carrier plate and the main sliding plate leads to an offset of the carrier plate, together with the motor vehicle attached to it, with respect to the ground. The lifting unit supported on the ground and the main slide plate attached to it remain stationary in their original position. In the lowered position, on the other hand, in which the motor vehicle sits on the ground and the lifting unit preferably has no contact with the ground, a relative movement between the carrier plate and the main sliding plate leads to an offset of the main sliding plate together with the lifting unit attached to it, whereas this Motor vehicle remains stationary in its original position together with the carrier plate.

According to the invention, a motor vehicle which is connected to the lifting device according to the invention can consequently be moved by lifting the motor vehicle in a first step by the lifting unit. Subsequently, in a second step, a translational relative movement between the carrier plate and the main sliding plate is carried out, for example along a longitudinal or transverse direction of the vehicle, as a result of which Motor vehicle is offset from the ground. The motor vehicle is then, in a third step, lowered by the lifting unit in the offset position until it rests on the ground. At the same time, the lifting unit is retracted so that it no longer touches the ground. Finally, or as a fourth step, a new translational relative movement is then carried out between the carrier plate and the main sliding plate in the sliding plane, as a result of which the main sliding plate together with the at least one lifting unit returns to its starting position. These four steps can be repeated as often as required, whereby the motor vehicle can be moved a desired distance without the driver or the occupants having to leave the vehicle.

Because of the translatory sliding movement of the carrier plate and the main sliding plate in relation to one another, the motor vehicle can be offset relative to the ground in any direction within the sliding plane with only little design effort. In particular, in the case of the components carrying the motor vehicle, additional pivotable or rotatable joints for locomotion can be dispensed with. The carrier plate and the main sliding plate are instead slidably connected to one another. In order to take up as little space as possible below the vehicle or to influence the ground clearance as little as possible, the lifting device has a total thickness of preferably at most 6 cm.

Advantageous embodiments are claimed in the subclaims and are explained in more detail below.

According to an advantageous embodiment of the lifting device according to the invention, the main slide plate is connected to the support plate with at least one auxiliary slide plate to form the movable connection, the support plate being arranged between the main slide plate and the at least one auxiliary slide plate and being movable in the sliding plane relative to the main slide plate and the at least one auxiliary slide plate is. Accordingly, starting from the vehicle underbody in the direction of the subsurface, at least one, in particular two, auxiliary sliding plates are preferably then the carrier plate and finally the main sliding plate, which in turn is connected to the at least one lifting unit. The auxiliary sliding plates, the carrier plate and the main sliding plate are aligned essentially parallel to one another, the carrier plate being slidably movable between the auxiliary sliding plates and the main sliding plate.

According to a further development of this embodiment, the main sliding plate and the at least one auxiliary sliding plate are connected to one another by means of spacer bars which pass through recesses arranged in the carrier plate.

The recesses arranged in the carrier plate and the spacer bars can be designed together to guide and / or to limit the movement of the carrier plate relative to the main sliding plate in the sliding plane.

Thus, recesses are preferably arranged within the carrier plate, and spacer bars are arranged within the recesses. Above the carrier plate, the at least one auxiliary plate and below the carrier plate the main sliding plates are connected to the spacer bars, in particular firmly. The spacer bars can move translationally within the recesses along a vehicle longitudinal direction or along a vehicle transverse direction, the spacer bars being guided within the recesses and / or their movement being limited by the recesses. It is advantageous if the height of the spacer rods corresponds at least to the height of the carrier plate or the spacer rods are designed slightly higher than the carrier plate, so that free sliding between the carrier plate and the at least one auxiliary sliding plate and between the carrier plate and the main sliding plate is made possible. Such a sliding relative movement can be supported in an optional embodiment by a lubricant system for forming a sliding layer comprising lubricant between the carrier plate and the main sliding plate and / or the carrier plate and the at least one auxiliary sliding plate.

The lubricant system is preferably arranged between the vehicle underbody and the carrier plate, in particular lubricant lines can be on the the top of the carrier plate facing the vehicle underbody and open at the at least one auxiliary sliding plate and / or the main sliding plate, so that lubricant conveyed in the lubricant lines forms a lubricating layer between the carrier plate and the main sliding plate and / or between the carrier plate and the at least one auxiliary sliding plate. In addition or as an alternative to the lubricant system, the top of the carrier plate facing the vehicle underbody and / or the bottom of the carrier plate facing the substrate and / or the bottom of the at least one auxiliary sliding plate facing the carrier plate and / or the top of the main sliding plate facing the carrier plate can also be at least partially , be provided with a lifetime grease lubrication and / or a plastic sliding layer which, in addition to the lubrication, is intended to reduce the friction and wear during the translatory movements.

According to an advantageous embodiment of the invention, at least one longitudinal actuator for moving the main sliding plate along a longitudinal direction in the sliding plane is provided, which is connected to the main sliding plate via a first end section and to the main sliding plate via a second end section, in particular indirectly by means of a pulley having deflection rollers, and at least a transverse actuator for moving the main sliding plate along a transverse direction in the sliding plane, which is connected to the main plate via a first end section with the carrier plate and via a second end section, in particular indirectly by means of a cable pull having deflection rollers.

A first end section of the longitudinal or transverse actuators, which are preferably designed as hydraulic cylinders, is, in particular directly or directly, fixedly arranged on the carrier plate. The second end section can be connected to the main sliding plate indirectly or indirectly via a cable pull. This has the advantage that a linear longitudinal and transverse movement of the main sliding plate relative to the carrier plate can be implemented independently of the orientation of the respective actuators by using one or more deflection rollers. In order to carry out a uniform, linear movement, the second end sections, in particular the cable pulls, are connected centrally to a longitudinal or transverse edge of the main sliding plate. With the help of the longitudinal or transverse actuators, however, not only linear movements can be realized, so in a particularly preferred development of this embodiment two longitudinal actuators can be provided for moving the main sliding plate along the longitudinal direction y and two transverse actuators for moving the main sliding plate along the transverse direction, the Longitudinal actuators and the transverse actuators are connected via their respective first end section to the carrier plate and via their second end section, in particular indirectly by means of cables having deflection rollers, in each case to an edge end of a longitudinal or transverse edge of the main sliding plate, so that the main sliding plate is connected by means of the longitudinal actuators and / or Cross actuators is rotatable relative to the carrier plate.

Since the respective second end sections of the longitudinal and transverse actuators are connected off-center, to the edge ends of the longitudinal or transverse edge of the main sliding plate, in particular indirectly via respective cable pulls, each actuator engages at a corner of the main sliding plate assigned to it. For a linear movement of the main sliding plate in the longitudinal direction of the vehicle, both longitudinal actuators are subjected to the same force, so that they move the main sliding plate and all components attached to it in parallel and straight. If the main slide plate is to be moved in the vehicle's transverse direction, the cross actuators are used accordingly. For a rotation of the main sliding plate, one longitudinal or transverse actuator is activated for each longitudinal or transverse side, i.e. applied with a force, wherein the second end portions of the activated actuators are preferably connected to adjacent corners of the main sliding plate. Due to the asymmetrical application of force, the main sliding plate can be rotated. In this embodiment, the recesses provided with the spacer bars arranged therein are expediently adapted to the rotation of the main sliding plate.

Furthermore, an advantageous exemplary embodiment provides that each lifting unit has at least two linear actuators arranged opposite one another, a first end section of each linear actuator being articulated with the main sliding plate and a respective second end section being articulated with one The foot element of the lifting unit is connected, so that the foot element can be moved from a retracted position into an extended position relative to the carrier plate and / or the main sliding plate along a lifting direction, perpendicular to the sliding plane. The first end sections of the linear actuators are expediently connected to the main sliding plate indirectly or indirectly, that is to say via a lifting unit support frame.

The linear actuators, which are preferably designed as hydraulic cylinders, are extended at the same time and exert a lifting force on the respective foot element, causing it to move from the retracted position in the direction of the ground. The foot element is then supported on the ground in order to raise the motor vehicle from a lowered position to a raised position. Due to the articulated connection of the linear actuators with the main sliding plate and with the respective foot element, it is not necessary to arrange them vertically with respect to the base. Preferably, two linear actuators arranged opposite one another lie in the retracted position on an underside of the main sliding plate facing the ground, i. H. the linear actuators run parallel to the main sliding plate or to the carrier plate and thus to the sliding plane. The articulated connections are preferably designed as pivot axes about which the linear actuators pivot when they are moved out of the retracted position into the extended position and vice versa. In a fully extended position, the linear actuators form an acute angle with the main sliding plate, in particular an angle of approximately up to 60 °. Due to the opposite arrangement of at least two linear actuators per lifting unit, particularly heavy motor vehicles or loads can be lifted, since the linear actuators are supported against one another to absorb corresponding forces and moments.

In particular for the function for overcoming obstacles, according to an advantageous embodiment of the invention, at least one stabilization unit is provided which has a stabilization actuator for stabilizing the motor vehicle, in particular in the raised position, a first end section of the stabilization actuator with the carrier plate and a second end section of the stabilization actuator is connected in an articulated manner to a stabilization foot element, so that the stabilization foot element can be moved from a retracted position into an extended position relative to the carrier plate and / or the main sliding plate along a lifting direction, perpendicular to the sliding plane.

According to a development of this embodiment, the at least one stabilization unit has a swivel actuator for swiveling out the stabilization unit, a first end section of the swivel actuator being articulated to the support plate and a second end section being articulated to the stabilization actuator.

Preferably, four stabilization units are each assigned to a corner region of the support plate, the stabilization actuator of which, in particular in the form of a hydraulic cylinder, is articulatedly connected to the support plate via a first end section. Similar to the lifting units described above, the stabilizing actuator is also connected in an articulated manner to a stabilizing foot element via a second end section. In this embodiment, too, the articulated connections can be designed as pivot axes about which the respective end section of the stabilization actuator pivots. In contrast to the lifting units described above, the stabilization actuator encloses an angle of 90 ° with the carrier plate in a fully extended position, as a result of which bending moments and transverse forces on the stabilization actuator can be kept as small as possible. The stabilizing actuators can be swiveled out by swivel actuators, preferably also in the form of hydraulic cylinders. Alternatively, the swivel actuators can also be driven by an electric motor.

In addition to the wheels of the motor vehicle and the lifting units, the stabilization units form a third standing position in order to hold the motor vehicle in a raised position, preferably horizontally, when the lifting units are in their retracted position. This embodiment enables a translational movement of the vehicle without the need to contact or place the motor vehicle wheels on the ground. According to an expedient exemplary embodiment, it is advantageous for the function if at least one lifting unit and / or at least one stabilizing unit is assigned a locking unit which has one or more pawls and a locking actuator for securing the assigned lifting unit and / or stabilizing unit in the retracted position.

In a further development it is provided that the locking actuator is arranged on the main sliding plate and / or the carrier plate and indirectly, via a cable pull, in particular a Bowden cable, to which one or more pawls are connected. The blocking actuator is expediently indirect or indirect, i.e. connected to the main sliding plate and / or the carrier plate via a pawl carrier. In particular, the pawl carrier can also be indirectly or indirectly, i.e. be connected to the main slide plate via the lifting unit support frame.

The locking unit is not absolutely necessary for the function of the individual lifting units and / or the stabilization units, but in the form of a safety system it can ensure that the lifting units and / or the stabilization units remain in their retracted position even if the pressure in the hydraulic system is prolonged Has not dropped and the foot elements and / or the stabilizing foot elements would lower the respective hydraulic cylinder into the extended position due to their own weight. Furthermore, the locking unit prevents the foot elements and / or the stabilizing foot elements from “rattling”, which could occur due to unevenness in the floor during fast travel.

The pawls designed as levers can preferably be actuated by means of a return spring and a Bowden cable with a connected Bowden cable actuator. Here, one end of the lever presses against the foot element and / or the stabilizing foot element and the other end can be pulled by the Bowden cable. Alternatively, rotary actuators could also be mounted directly on the pawl and thus replace the Bowden cables. According to a particularly maneuverable embodiment of the invention, the lifting device has a rotation unit which is designed to rotate the motor vehicle and the carrier plate relative to one another about an axis of rotation.

In an advantageous further development, the rotation unit can be arranged between the vehicle underbody and the support plate and comprises a rotation bearing and a rotation actuator, the rotation bearing being connectable to the vehicle underbody and to the support plate via a first bearing section. The rotary unit is expediently connected to the vehicle underbody by means of a rotary frame and the first bearing section of the rotary bearing is indirect or indirect, i.e. connected to the vehicle underbody via the rotating frame.

The rotary actuator can, for example, be attached to the rotary frame and directly, e.g. B. adjoin via a frictional contact to the rotary bearing, in particular a plate bearing, for its drive. According to a particularly preferred development of this embodiment, however, it is expedient for the rotary actuator to be arranged on the underside of the carrier plate facing the substrate and to be indirectly connected to the rotary bearing by means of a belt. An embodiment with two rotary actuators arranged in the respective positions is also conceivable. The rotary actuators themselves can preferably be a drive motor. By means of the rotation unit, turning maneuvers in confined environmental conditions are possible by any angular degree, e.g. B. possible by 180 °.

In addition to the movement of a motor vehicle, it is also conceivable to use the lifting device according to the invention in one of the variants described above for transporting or for moving other loads.

The invention is also directed to a rotation unit for a lifting device, in particular according to one of the above embodiments. According to the invention, the rotation unit can be arranged between the vehicle underbody of a motor vehicle and the lifting device, so that the motor vehicle and the lifting device are relative to one another about an axis of rotation are rotatable, the rotation unit comprising a rotation bearing and a rotation actuator, and the rotation bearing being connectable to the vehicle underbody via a first bearing section, in particular indirectly via a rotation frame, and to the carrier plate via a second bearing section.

Furthermore, a locking unit for a lifting device, in particular according to one of the above embodiments, is also included in the scope of the inventive idea. According to the invention, the locking unit is assigned to a lifting unit and / or a stabilizing unit of the lifting device and has one or more pawls and a locking actuator for securing the assigned lifting unit and / or stabilizing unit, the locking actuator using one or more of a cable, in particular a Bowden cable several pawls is connected.

Finally, the invention is directed to a motor vehicle with a lifting device according to one of the previously described embodiments. A drive unit driving the at least one longitudinal actuator and / or the at least one transverse actuator and / or the at least two linear actuators and / or the at least one stabilizing actuator and / or the at least one swivel actuator and / or the at least one locking actuator and / or the at least one rotary actuator can be arranged in a loading space or in an engine compartment of the motor vehicle.

A control unit, which is provided for the automatic control and readjustment or adjustment of the lifting device, can also be arranged inside the motor vehicle, preferably inside a loading and / or trunk and / or engine compartment. In particular, each lifting unit and / or each stabilizing unit can be controlled individually, which is why the stroke of each foot element and / or stabilizing foot element can be regulated individually. This allows the motor vehicle when lifting z. B. bring it into a horizontal orientation, even if the surface is very uneven or inclined. The orientation of the motor vehicle can be controlled manually and / or selectively either by the user, in particular the driver or another vehicle occupant, or by an electronic one Valve control can be taken over automatically by inclination sensors detecting the orientation of the motor vehicle. In both cases it is not necessary for the user or the vehicle occupants to get out.

In order to move the motor vehicle out of a stuck situation or to climb over an obstacle, the vehicle is first raised. In the raised position, the motor vehicle is displaced sideways by a relative movement of the carrier plate to the main sliding plate. If the vehicle has made a longitudinal or transverse movement after lifting, it is lowered again. In the lowered position, the wheels either already have sufficient traction to continue or the described sequence of movements is repeated. For this it is first necessary that the main sliding plate is set back in a direction opposite to the previously performed longitudinal or transverse movement, as long as the lifting units are retracted and the wheels touch the ground. The motor vehicle can then be raised again and the sequence described repeated as often as desired until the vehicle has been moved to a location where it can move on the ground due to its wheel drive.

In the event that the ground is very uneven or in the event that obstacles are to be overcome, the stabilization actuators must be activated via the control. If, for example, the vehicle is to “climb” over an obstacle, it is first raised as described above and laterally offset. If the vehicle were then lowered again, sections of the vehicle underbody and / or the lifting device could touch the obstacle, making a subsequent backward movement of the main slide plate impossible. There is also a risk of the vehicle being unfavorably skewed. Depending on the position and orientation of the motor vehicle relative to the obstacle and / or ground, one, two, three or four of the stabilizing actuators can extend, align the vehicle horizontally and carry it in this orientation, while the lifting units are moved into their retracted position for the backward movement of the main sliding plate . The vehicle can be leveled automatically by means of the control and appropriate sensors. In the next iteration, if the lifting units move into their extended position again, and after the main slide plate has returned to its original position, the stabilizing actuators are partially or completely retracted in order to avoid a collision with the surface and / or the obstacle, depending on the nature of the surface

Further details, features, feature (sub) combinations, advantages and effects based on the invention result from the following description of preferred exemplary embodiments of the invention and the drawings. These each show schematically in FIG. 1 a perspective illustration of a first exemplary one

Embodiment of a lifting device according to the invention with a carrier plate and a main sliding plate,

Fig. 2a is a perspective view of the support plate and the

Main sliding plate of the first exemplary embodiment of the lifting device according to the invention from FIG. 1,

Fig. 2b is a detailed perspective view of the support plate and the

Main sliding plate from FIG. 2a,

3 shows a top view of the lifting device from FIG. 1 with an additional lubricant system, FIG. 4 shows a perspective illustration of a first exemplary one

1 embodiment with extended lifting units and stabilizing units,

5 shows a detailed view of a lifting unit of the first exemplary

Embodiment according to FIG. 1,

6 is a plan view of a second exemplary embodiment of the lifting device according to the invention, Fig. 7 is a perspective view of a third exemplary embodiment of the lifting device according to the invention with a rotation unit and in

8 shows an exemplary perspective illustration of an optional

Protective cover.

The figures are merely exemplary in nature and only serve to understand the invention. The same elements are always provided with the same reference numerals, which is why they are usually only described once. The variants shown are largely symmetrical with respect to their longitudinal and transverse axes. For clarity, elements reflecting on these axes are always identified only once with a reference symbol in the figures.

FIG. 1 shows a first exemplary embodiment of a lifting device 10 according to the invention for moving a motor vehicle from the perspective of the ground in the direction of the vehicle underbody. The lifting device 10 essentially comprises a carrier plate 11, a main sliding plate 12 and four lifting units 100. The entire lifting device 10 is flat in order to take up as little space below the vehicle or to influence the ground clearance as little as possible. The carrier plate 1 1 is fastened to the vehicle underbody of the motor vehicle with its upper side 1 1 a, which is not visible here and faces the vehicle underbody. On the underside 1 1 b of the carrier plate 11 facing the substrate (not shown here), the main sliding plate 12 extends essentially parallel to the carrier plate 11 or the vehicle underbody and / or the substrate. The main sliding plate 12 and the carrier plate 1 1 are in one

Sliding plane xy, which is spanned by the transverse direction x and the longitudinal direction y, movable relative to one another. The four lifting units 100 are designed to lift the motor vehicle along a lifting direction z from a lowered position in which the motor vehicle is resting on the ground to a raised position in which the motor vehicle is preferably not in contact with the ground, and even in the opposite direction from a retracted position to an extended position movable. Due to the rhombus-shaped arrangement of the lifting units 100 on the main sliding plate 12, a larger lifting path along the lifting direction z can be realized. The four lifting units 100 are each shown in their fully retracted position and are connected via a lifting unit support frame 120 to an underside of the main sliding plate 12 facing the ground. At each of the four outer corners of the carrier plate 11 there is a stabilizing unit 200 which, similar to the lifting units 100, is also shown here in its fully retracted position, but can also be moved into an extended position. The lifting units 100 are each secured in their retracted position with a locking unit 300 comprising pawls 320.

For moving the main sliding plate 12 relative to the carrier plate 11 in the sliding plane x-y, two longitudinal actuators 20 and two transverse actuators 30 are arranged on the underside 11b of the carrier plate 11, which are each designed here as linear hydraulic cylinders. The longitudinal actuators 20 are provided for moving, in particular for pulling, the main sliding plate 12 along the longitudinal direction y. The transverse actuators 30 are designed to move, in particular to pull, the main sliding plate 12 along the transverse direction x. Both the longitudinal actuators 20 and the transverse actuators 30 are oriented perpendicular to their respective pulling direction in order to position them as space-saving as possible. In order to enable the necessary redirection of the pull direction, a second end section 32 of a transverse actuator 30 and a second end section 22 of a longitudinal actuator 20 are each connected to one end of a pull cable 17, in particular a steel cable, which is deflected by means of various deflecting rollers 18. The other end of the pull rope 17 is in the middle with a transverse edge, here indirectly over the

Lifting unit support frame 120, or connected in the middle to a longitudinal edge, here indirectly via a cable support 19. The respective first end section 31 of the transverse actuators 30 and the respective first end section 21 of the longitudinal actuators 20 are fixedly arranged on the carrier plate 11. The cable carriers 19 are in turn each fastened to the lifting unit carrier frames 120.

In the raised position of the motor vehicle, by activating a longitudinal actuator 20 or a transverse actuator 30, the carrier plate 11 and together with this the motor vehicle attached to the carrier plate 1 1 is moved in the corresponding direction, in particular pulled. The retraction of a longitudinal actuator 20 or a transverse actuator 30 causes a pulling force on the traction cable 17 connected to the respective second end section 22 or 32. At the same time, the respective second end section 22 or 32 of the opposite longitudinal actuator 20 or transverse actuator 30 is extended. This can e.g. B. via a corresponding circuit of hydraulic valves or control levers. Activation of the respectively adjacent longitudinal actuators 20 or transverse actuators 30 can also be realized via this circuit in order to be able to follow the offset between the carrier plate 11 and the main sliding plate 12.

In the event that an exact position and path determination of the linear longitudinal and transverse movements is required, e.g. B. for automatic, electronic control, or even if the user, in particular the driver or the vehicle occupants require a visual display of the respective position of the main sliding plate 12, 19 and preferably on the cable carrier 19, displacement sensors 50 can be attached, both can supply electronic signals for the control unit and also serve as a visual display due to their externally visible attachment. The displacement sensors 50 comprise increment encoder strips 51 arranged on the carrier plate 11 for the longitudinal direction y and the transverse direction x and increment transducers 52 arranged on the cable carrier 19, which can move longitudinally and transversely with linear movement over the increment encoder strips 51 and thereby generate path signals. In addition, the user, in particular the driver or the vehicle occupants, can be given a complete picture of the situation under the vehicle without the latter having to leave the vehicle by arranging cameras with integrated lamps at various positions on the support plate 11 and positioning them in such a way that every functional component is filmed and illuminated and the images are transferred to screens in the vehicle interior.

Figures 2a and 2b each show a perspective view of the carrier plate 1 1 and the main sliding plate 12 of the first exemplary Embodiment of the lifting device 10 according to the invention from Figure 1 with a view from the ground towards the motor vehicle underbody. 2b shows a detailed view of FIG. 2a. It can be clearly seen that two auxiliary sliding plates 13 are arranged opposite the main sliding plate 12, on the upper side 11a of the carrier plate 11 facing the vehicle underbody, which are parallel to the carrier plate 11 and extend to the main slide plate 12. In other words, the carrier plate 11 is slidably arranged between the auxiliary sliding plates 13 lying above and the main sliding plate 12 lying underneath. The auxiliary sliding plates 13 and the main sliding plate 12 are each firmly connected to one another by a spacer rod 14, the spacer rod 14 being arranged in each case in a recess 15 of the carrier plate 11, which is in particular cruciform. The auxiliary sliding plates 13 are made with a small thickness, but are sufficiently large in their longitudinal and transverse dimensions so that they cannot fall through the recesses 15 in any state of movement.

FIG. 3 shows the lifting device 10 from the perspective of the vehicle underbody in the direction of the subsurface. For a better understanding of the orientation and size of the lifting device 10, the motor vehicle axles 1 and wheels 2 are indicated schematically here. Starting from the vehicle underbody, the two auxiliary sliding plates 13 can first be seen. Arranged on the respective underside of the auxiliary sliding plates 13, the carrier plate 11 follows with the cross-shaped recesses 15, which are shown here partly in broken lines. Arranged in each case in the cross-shaped recesses 15 is a spacer bar 14, likewise shown in dashed lines, which can move longitudinally or transversely within the cross-shaped recesses 15. Firmly connected to the spacer bars 14, the main sliding plate 12 follows at the lowest position, ie assigned to the subsurface, which can be seen here through the cross-shaped recesses 15. As can be seen from the illustration, the spacer rod 14 corresponds approximately in its longitudinal or transverse dimension to the dimensions of the cruciform recess 15, as a result of which this is suitable on the one hand for guiding the spacer rod 14 and on the other hand limits or stops a relative movement of the carrier plate 11 to the main sliding plate 12 in the longitudinal direction y and in the transverse direction x. The height of the spacer bar 14 is preferably slightly higher than that of the carrier plate 11, so that the carrier plate 11 can slide relative to the auxiliary sliding plates 13 and to the main sliding plate 12 with little friction. To further reduce friction, FIG. 3 also shows a lubricant system 16, the lubricant lines of which run on the upper side 1 1 a of the carrier plate 1 1 facing the vehicle underbody. The lubricant lines can form branches in holes at specific points, which are located under the lubricant lines in the carrier plate 11. In this way, by means of the lubricant system 16, both a lubrication layer can be formed between the carrier plate 11 and the auxiliary sliding plates 13 and between the carrier plate 11 and the main sliding plate 12.

FIG. 4 also shows a schematic, perspective representation of the first exemplary embodiment of the lifting device 10 according to the invention. According to the illustration, both the four lifting units 100 and the four stabilizing units 200 are shown in their fully extended position. The pawls 320 of the locking unit 300 are unlocked, the main sliding plate 12 is in a central starting position. In this position of the lifting device 10, the motor vehicle is in a raised position, in which the motor vehicle wheels 2 (not shown here) no longer touch the ground; the motor vehicle is only supported by the stabilization units 200.

Each stabilization unit 200 comprises a stabilization actuator 210, the first end section 21 1 of which is articulated to the support plate 11 by means of a pivot axis, and a stabilization foot element 220 is arranged on the second end section 212. Via a swivel actuator 230, the first end section 231 of which is articulated, by means of a swivel axis, is connected to the support plate 11 and the second end section 232 is also articulated to the stabilization actuator 210, the stabilization unit 200 can be swiveled out into an orientation perpendicular to the support plate 11. The stabilizing foot element 220 is also pivotally connected to the second end section 212 of the stabilizing actuator 210, as a result of which this It can compensate for unevenness in the surface. Optionally, the stabilization actuators 210 can be supported by pivotable and extendable linear guides (not shown here) for absorbing any transverse forces.

Each lifting unit 100 is connected to the main sliding plate 12 via a lifting unit support frame 120 and each comprises four linear actuators 1 10, which can be pivoted with their respective first end section 1 1 1 and shown pivoted out in FIG. 4 via a pivot axis with the

Lift unit support frame 120 are connected. A foot element 130, likewise pivotable about a pivot axis, is arranged on the respective second end section 112 of the linear actuators 110.

FIG. 5 shows a detailed view of a lifting unit 100 together with a lifting unit support frame 120 of the exemplary first embodiment of the lifting device 10 according to the invention. The four linear actuators 110 are each guided by means of a linear guide 140, which run parallel to the linear actuators 110 designed as hydraulic cylinders and are designed to be pivotable and extendable about respective pivot axes. The

Linear guides 140 have the task of absorbing transverse forces and bending moments so that they are not transmitted to the linear actuators 110. Instead of the four linear actuators 110 per lifting unit 100, it is also conceivable in an alternative embodiment (not shown) for lighter vehicles to use only two linear actuators 110 without linear guides 140. In this embodiment, the foot elements 130 can be made in two parts and can be formed on both sides of the linear actuators 110 in order to achieve a design that is as flat as possible. The lifting unit 100 is secured in the retracted position by the locking unit 300. For this purpose, the foot element 130 is held by two pawls 320 arranged opposite one another. Each pawl 320 is pivotable about a pivot axis, designed in the manner of a lever and held in the closed position shown here via a Bowden cable 330. The Bowden cables 330 are directed via a plurality of deflection rollers 18 to a locking actuator 310, in particular a linear actuator, which is arranged on the main sliding plate 12 (see FIG. 4). By activating the lock actuator 310, ie when this extends, the tension on the Bowden cable 330 is reduced. This can return springs 340, z. B. torsion springs, but also linear helical compression springs or tension springs or similar springs open the pawls 320 and thus release the respective lifting unit 100. FIG. 6 shows a second exemplary embodiment of the lifting device 10 according to the invention. This embodiment comprises two transverse actuators 30 or longitudinal actuators 20 for each longitudinal edge and per transverse edge of the carrier plate 11. In contrast to the first embodiment, the second end sections 32, 22 of the actuators 30, 20 are off-center, that is to say with one, via pull cables 17 and deflection rollers 18 each end of the longitudinal edge or the transverse edge of the main sliding plate 12 connected. Via an electronic and controlled control of all eight actuators 20, 30 at the same time, both a linear displacement, ie a translational offset, of the carrier plate 11 relative to the main sliding plate 12 and a rotation of the carrier plate 11 relative to the main sliding plate 12 can be arbitrary Angular degrees are done. The recesses 15 (not visible here) arranged in the carrier plate 11 are not cruciform in this embodiment, but have an approximately oval shape. The embodiment shown offers the possibility of rotating the motor vehicle in a small space relative to the ground, but without increasing the overall height or thickness of the lifting device 10.

FIG. 7 shows a third exemplary embodiment of the lifting device 10 according to the invention with a view from the ground towards the vehicle underbody. This embodiment also makes it possible to rotate the motor vehicle relative to the ground by desired degrees of angle. Compared to the first exemplary embodiment, the third exemplary embodiment for rotation additionally has a rotation unit 400, with a rotation frame 440, a rotation bearing 420, in particular designed as a plate bearing, and one or alternatively two rotation actuators 410. In this embodiment, the rotation frame is used instead of the carrier plate 11 440 fixedly or releasably connected to the motor vehicle or to its vehicle underbody, the rotary bearing 420 is connected via a first bearing section 421 to the rotating frame 440 and consequently indirectly to the vehicle underbody, and via a second bearing section 422 to the carrier plate 11. The rotation bearing 420 and thus the rotation frame 440 can be rotated relative to the carrier plate 11 by means of the rotation actuators 410, in particular designed as drive motors. For this purpose, a rotary actuator 410 can be attached to the rotary frame 440, which is used to drive the rotary bearing 420 via a frictional contact or else, for. B. via gears on the rotary bearing 420 and on the motor shaft, is suitable. Alternatively or additionally, a rotary actuator 410 is fastened to the underside 11b of the carrier plate 11 facing the subsurface, the drive shaft with the drive pinion dipping through a hole in the carrier plate 11. The transmission of the torque from the drive shaft can be via a belt 430, z. B. a chain, a toothed belt or a V-belt. Finally, FIG. 8 shows an optional protective cover 500 for a lifting device 10 with a view from the ground towards the motor vehicle underbody. The protective cover 500 surrounds all of the displaceable elements located under the carrier plate 11 with the exception of the foot elements 130. The protective cover 500 is fastened to the carrier plate 11 at least at its peripheral regions 510 and comprises a rigid material which is interrupted by movable, elastic folds 520 , which enables a relative displacement of the protective sheath 500 in all three spatial directions, in particular in the stroke direction z, along a longitudinal direction y and along a transverse direction x. Alternatively, the protective cover 500 can be made entirely of an elastic material with or without additional elastic folds. Reference list

1 motor vehicle axle

2 motor vehicle wheel

10 lifting device

1 1 carrier plate

1 1 a top of the carrier plate

1 1 b underside of the carrier plate

12 main sliding plate

13 auxiliary slide plate

14 spacer bar

15 recesses

16 lubricant system

17 cable / pull cable

18 pulley

1 9 cable carrier

20 longitudinal actuator

21 first end section of the longitudinal actuator 22 second end section of the longitudinal actuator 30 transverse actuator

31 first end section of the transverse actuator

32 second end section of the transverse actuator

50 displacement sensor

51 increment encoder strips

52 increment sensors

100 lifting unit

1 10 linear actuator

1 1 1 first end section of the linear actuator 1 12 second end section of the linear actuator 120 lifting unit support frame

130 foot element

140 linear guide

200 stabilization unit

210 stabilization actuator 21 1 first end section of the stabilizing actuator 212 second end section of the stabilizing actuator 220 stabilizing foot element

230 swivel actuator

231 first end section of the pivot actuator

232 second end section of the swivel actuator 300 locking unit

310 lock actuator

320 pawl

330 Bowden cable

340 return spring

400 rotation unit

410 rotary actuator

420 rotary bearings

421 first storage section

422 second storage section

430 straps

440 rotating frame

500 protective cover

510 peripheral area

520 elastic folds

y longitudinal direction

X transverse direction

z stroke direction

x-y sliding plane

Claims

Claims:

1. lifting device (10) for locomotion of a motor vehicle, with

- A carrier plate (1 1), which is suitable for detachable or fixed connection to a vehicle underbody of the motor vehicle, and

at least one lifting unit (100) which is provided for lifting the motor vehicle from a lowered position, in which the motor vehicle is resting on a surface, into a raised position,

characterized in that

the at least one lifting unit (100) is arranged on a main sliding plate (12), the main sliding plate (12) and the carrier plate (11) being movable relative to one another in a sliding plane (xy), so that due to a relative movement between the Carrier plate (1 1) and the main sliding plate (12)

- In the raised position, the carrier plate (1 1) can be moved with the motor vehicle relative to the ground in the sliding plane (x-y), and

- In the lowered position, the main sliding plate (12) with the at least one lifting unit (100) is movable relative to the ground in the sliding plane (x-y).

2. Lifting device (10) according to claim 1,

characterized in that

the main slide plate (12) is connected to at least one auxiliary slide plate (13) to form the movable connection with the support plate (1 1), the support plate (1 1) being arranged between the main slide plate (12) and the at least one auxiliary slide plate (13) and relative to the main sliding plate (12) and the at least one auxiliary sliding plate (13) is movable in the sliding plane (xy).

3. Lifting device (10) according to claim 2,

characterized in that the main sliding plate (12) and the at least one auxiliary sliding plate (13) are connected to one another by means of spacer bars (14) which pass through recesses (15) arranged in the carrier plate (11).

4. Lifting device (10) according to claim 3,

characterized in that

the recesses (15) arranged in the carrier plate (1 1) and the spacer bars (14) are designed jointly for guiding and / or for limiting the movement of the carrier plate (11) relative to the main sliding plate (12) in the sliding plane (xy) .

5. Lifting device (10) according to one of the preceding claims, characterized by

a lubricant system (16) for forming a lubricating layer comprising lubricant between the carrier plate (1 1) and

Main sliding plate (12) and / or the carrier plate (11) and the at least one auxiliary sliding plate (13).

6. Lifting device (10) according to one of the preceding claims, characterized by

at least one longitudinal actuator (20), which for moving the main sliding plate (12) along a longitudinal direction (y) in the sliding plane (x-y) via a first end section (21) with the carrier plate (11) and via a second end section (22 ), in particular indirectly by means of a pulley (17) having a cable pull (17), is connected to the main sliding plate (12), and at least one transverse actuator (30) which is used to move the main sliding plate (12) along a transverse direction (x) in the sliding plane (xy), via a first end section (31) with the carrier plate (11) and via a second end section (32), in particular indirectly by means of a deflection pulley (18) having a cable pull (17), with the

Main sliding plate (12) is connected.

7. Lifting device (10) according to claim 6,

characterized in that four longitudinal actuators (20) are provided for moving the main sliding plate (12) along the longitudinal direction (y) and four transverse actuators (30) are provided for moving the main sliding plate (12) along the transverse direction (x), the second end sections (22, 32) of the two longitudinal actuators (20) and the two transverse actuators (30), in particular indirectly via deflection rollers

(18) having cables (17), each having an edge end of a longitudinal or a transverse edge of the main sliding plate (12), so that the main sliding plate (12) by means of the longitudinal actuators (20) and / or the transverse actuators (30) relative to the carrier plate (1 1) is rotatable.

8. Lifting device (10) according to one of the preceding claims, characterized in that

each lifting unit (100) has at least two linear actuators (1 10) arranged opposite one another, a first end section (1 1 1) of each linear actuator (1 10) being articulated, in particular indirectly via a lifting unit support frame (120), with the main sliding plate (12 ) and a respective second end section (1 12) is connected in an articulated manner to a foot element (130) of the lifting unit (100), so that the foot element (130) relative to the carrier plate (1 1) and / or the main sliding plate (12) along a lifting direction (z), perpendicular to the

Sliding plane (x-y) is movable from a retracted position to an extended position.

9. Lifting device (10) according to one of the preceding claims, characterized by

at least one stabilization unit (200) which has a stabilization actuator (210) for stabilizing the motor vehicle, in particular in the raised position, a first end section (21 1) of the stabilization actuator (210) with the carrier plate (1 1) and a second end section (212) of the stabilization actuator (210) with a

Stabilizing foot element (220) is articulated so that the stabilizing foot element (220) relative to the carrier plate (1 1) and / or the main sliding plate (12) along a stroke direction (z), perpendicular to the Sliding plane (xy), is movable from a retracted position to an extended position.

10. Lifting device (10) according to claim 9,

characterized in that

the at least one stabilization unit (200) has a swivel actuator (230) for swiveling out the stabilization unit (200), a first end section (231) of the swivel actuator (230) being articulated with the support plate (11) and a second end section (232) being articulated the stabilization actuator (210) is connected.

1 1. lifting device (10) according to any one of claims 8 to 10,

characterized in that

At least one lifting unit (100) and / or at least one stabilizing unit (200) is assigned a locking unit (300) which has one or more pawls (320) and a locking actuator (310) for securing the assigned lifting unit (100) and / or stabilizing unit ( 200) in the retracted position.

12. Lifting device (10) according to claim 1 1,

characterized in that

the locking actuator (310) is arranged on the main sliding plate (12) and / or the carrier plate (11) and indirectly, via a cable, in particular a Bowden cable (330), to which one or more pawls (320) are connected.

13. Lifting device (10) according to one of the preceding claims, characterized in that

the lifting device (10) has a rotation unit (400) which is used to rotate the motor vehicle and the carrier plate (1 1) and / or

Main sliding plate (12) is formed relative to each other.

14. Lifting device (10) according to claim 13,

characterized in that the rotation unit (400) can be arranged between the vehicle underbody and the carrier plate (1 1) and comprises a rotation bearing (420) and a rotation actuator (410), the rotation bearing (420) via a first bearing section (421), in particular indirectly via a rotation frame (440), with the vehicle underbody and via a second bearing section (422) with the carrier plate (1 1).

15. Lifting device (10) according to one of claims 13 or 14,

characterized in that

the rotary actuator (410) is arranged on the carrier plate (11) and is indirectly connected to the rotary bearing (420) by means of a belt (430).

16. Rotation unit (400) for a lifting device (10), in particular for a lifting device (10) according to one of claims 1 to 12,

characterized in that

the rotation unit (400) can be arranged between the vehicle underbody of a motor vehicle and the lifting device (10), so that the motor vehicle and the lifting device (10) can be rotated relative to one another about an axis of rotation, the rotation unit (400) being a

Rotary bearing (420) and at least one rotary actuator (410) and the rotary bearing (420) via a first bearing section (421), in particular indirectly via a rotating frame (440), with the vehicle underbody and via a second bearing section (422) with the carrier plate ( 1 1) is connectable.

17. Locking unit (300) for a lifting device (10), in particular for a lifting device (10) according to one of claims 1 to 15,

characterized in that

the blocking unit (300) of a lifting unit (100) and / or one

Stabilizing unit (200) can be assigned to the lifting device (10) and has one or more pawls (320) and a locking actuator (310) for securing the assigned lifting unit (100) and / or stabilizing unit (200), the locking actuator (310) being above a cable, in particular a Bowden cable (330), with which one or more pawls (320) is connected.

18. Motor vehicle with a lifting device (10) according to one of claims 1 to 15,

characterized in that

one of the at least one longitudinal actuator (20) and / or the at least one transverse actuator (30) and / or the at least two linear actuators (1 10) and / or the at least one stabilizing actuator (210) and / or the at least one swivel actuator (230) and / or the at least one locking actuator (310) and / or the at least one rotary actuator (410) driving unit can be arranged in a cargo and / or trunk and / or engine compartment of the motor vehicle.