Driverless transport vehicle with auxiliary support device

Abstract

The invention relates to a driverless transport vehicle (1), in particular for the transport of load carriers, which has a support frame (3), a chassis (4) and a load receiving platform (5) for receiving a load carrier, wherein the load receiving platform (5) is arranged on the support frame (3) so as to be raised and lowered in the vertical direction by means of a lifting device (7) and the support frame (3) and the chassis (4) are arranged in the vertical direction below the load receiving platform (5), wherein the chassis (4) has at least two axles (10; 11; 12), in particular a central axle (10) with two non-steered wheels (10a, 10b), a front axle (11) with at least one steered wheel unit (11a) and a rear axle (12) with at least one steered wheel unit (12a).The load-bearing platform (5) is provided with at least one fastening interface (30a; 30b) for the temporary attachment of an auxiliary support device (40a; 40b) by means of which the load-bearing platform (5) can be directly supported on a road surface (FB).

Description

[0001] The invention relates to a driverless transport vehicle, in particular for the transport of load carriers, which has a support frame, a chassis and a load-bearing platform for receiving a load carrier, wherein the load-bearing platform is arranged on the support frame in a vertical direction so as to be raised and lowered by means of a lifting device and the support frame and the chassis are arranged in a vertical direction below the load-bearing platform, wherein the chassis has at least two axles, in particular a central axle with two non-steered wheels, a front axle with at least one steered wheel unit and a rear axle with at least one steered wheel unit.

[0002] The invention further relates to a system comprising such a driverless transport vehicle and an auxiliary support device.

[0003] The invention further relates to a method for changing the tires of the wheels of the middle axle and / or the wheels of the front axle and / or the wheels of the rear axle of a transport vehicle according to the invention using an auxiliary support device according to the invention.

[0004] The invention further relates to methods for dismantling the load-bearing platform of a transport vehicle according to the invention using an auxiliary support device according to the invention.

[0005] A generic driverless transport vehicle is known from DE 20 2013 004 209 U1 and DE 43 05 666 A1.

[0006] EP 3 453 671 A1 discloses a forklift truck for air transport and a stowage method.

[0007] EP 3 447 023 A1 reveals an autonomous industrial truck with a chassis and a liftable and lowerable support chassis.

[0008] US 2018 / 0072212 A1 discloses a driverless transport vehicle according to the preamble of claim 1, configured for operation with a navigation and guidance system, comprising a basic frame structure that supports a material handling device.

[0009] To optimize and automate internal transport, driverless and therefore autonomous transport vehicles, so-called AGVs (automated guided vehicles), are increasingly being used. Various types of compact and low-profile self-driving platform vehicles are being deployed for this purpose. These vehicles drive under a load carrier, such as a pallet or trolley, and slightly lift it to move it horizontally, thus transporting and setting it down again. These driverless transport vehicles control and navigate themselves automatically and therefore autonomously.

[0010] Application areas for such driverless transport vehicles in internal transport include, for example, the transport of pallets or trolleys from the storage location to a picking workstation and back, or from a picking workstation to a production workstation.

[0011] Depending on the task, loads, load carriers, and environment, there are different requirements and therefore different types, sizes, and designs of such driverless transport vehicles.

[0012] In such driverless transport vehicles, the support frame, chassis, and lifting motor of the lifting device are typically arranged in a mobile undercarriage, which is enclosed in an outer housing that serves as a cover for the undercarriage. The load-handling platform is mounted on the top of the mobile undercarriage and can be raised and lowered.

[0013] When operating such driverless transport vehicles, the challenge arises of how to open the vehicle quickly, easily, and ergonomically so that a service technician can access the interior and thus the components within the chassis housing for servicing, such as diagnostics, and maintenance work, such as changing the wheels or axles. Ideally, these service tasks should be able to be performed by a single technician.

[0014] The aforementioned driverless transport vehicles, which have a compact design, face the following additional challenges: Many components are arranged within the chassis housing, resulting in a high component density. This high space utilization makes access to the components within the chassis housing difficult. The possibility of providing openings and / or removable covers and / or service hatches on the chassis to provide access to the components within the housing is very limited or nonexistent. Furthermore, in the aforementioned driverless transport vehicles, the load transported on the load-handling platform is often larger than the vehicle's footprint, causing the load to extend beyond the vehicle's outer contours and thus obstructing access.

[0015] The present invention is based on the objective of providing a transport vehicle of the type mentioned at the outset which is improved with regard to service, in particular enabling a simple and quick change of the wheels of the axles and / or enabling a simple and quick dismantling of the load-bearing platform for a subsequent dismantling of the housing of the underframe.

[0016] This problem is solved according to the invention by providing the load-bearing platform with at least one fastening interface for the temporary fastening of an auxiliary support device, by means of which the load-bearing platform can be supported directly on a road surface.

[0017] The concept according to the invention is therefore to provide the load-bearing platform with at least one mounting interface, which serves for the temporary attachment of an auxiliary support device during servicing. With the auxiliary support device attached to the load-bearing platform, the platform can be supported directly on a road surface. Using the lifting device of the load-bearing platform, the underframe of the transport vehicle can thus be easily jacked up or raised, enabling a quick and easy wheel change.With the auxiliary support device attached to the load-bearing platform, the load-bearing platform can still be removed from the underframe using the lifting device of the load-bearing platform, so that the housing can be easily removed from the underframe to gain access to the vehicle interior and thus to the components inside the housing for appropriate service work.

[0018] According to an advantageous embodiment of the invention, the fastening interface is formed by receiving holes for fastening screws provided in the load-bearing platform. A fastening interface formed by receiving holes for fastening screws for attaching the auxiliary support device has a simple and cost-effective design and allows the auxiliary support device to be attached to and detached from the load-bearing platform quickly and easily.

[0019] The mounting interface for attaching the auxiliary support device can be provided on only one side of the load-bearing platform. Particular advantages arise when, according to an advantageous embodiment of the invention, a mounting interface for attaching an auxiliary support device is provided on opposite sides of the load-bearing platform. If an auxiliary support device is mounted on opposite sides of the load-bearing platform, the transport vehicle can be completely lifted, or the load-bearing platform can be fully supported on the roadway via the two auxiliary support devices for dismantling.

[0020] Advantageously, a mounting interface is provided on the front and a mounting interface on the rear of the load-bearing platform.

[0021] The task is also solved by a system comprising a driverless transport vehicle and at least one auxiliary support device, in which the auxiliary support device is provided with a mounting interface that interacts complementarily with the mounting interface of the load-handling platform. This makes it possible to attach the auxiliary support device with its mounting interface to a corresponding mounting interface of the load-handling platform in a simple and quick manner.

[0022] According to an advantageous embodiment of the invention, the fastening interface is formed by receiving bores for fastening screws provided in the auxiliary support device. A fastening interface formed by receiving bores for fastening screws has a simple and cost-effective design and makes it possible to attach and detach the auxiliary support device to the load-bearing platform quickly and easily.

[0023] According to an advantageous embodiment of the invention, the auxiliary support device is provided with support means by which the auxiliary support device can be supported on the road surface.

[0024] The support means can be formed by support feet. Particular advantages arise when, according to a further development of the invention, the support means are designed as rollers. This allows for simple and ergonomic disassembly of the load-bearing platform from the base frame, since the load-bearing platform can be slid on the rollers of the auxiliary support device, thus eliminating the need for manual lifting and carrying of the load-bearing platform by a service person.

[0025] The problem is also solved by a method for changing the tires of at least one of the axles, in particular the tires of the middle axle and / or the tires of the front axle and / or the tires of the rear axle, of a transport vehicle according to the invention using an auxiliary support device according to the invention, in which the following steps are carried out for changing the tires: In a first step, the load-bearing platform is raised by operating the lifting device in a lifting direction; in a subsequent second step, at least one auxiliary support device is attached to the load-bearing platform; in a subsequent third step, the lifting device is operated in a lowering direction until the wheels of at least one of the axles of the transport vehicle are lifted off the road surface; in a subsequent fourth step, the wheels lifted off the road surface are changed.

[0026] With at least one auxiliary support device attached to the load-bearing platform, it is thus possible to lift one or all axles and therefore the wheels of the transport vehicle off the road surface.

[0027] The wheels of the axles of a transport vehicle according to the invention are generally designed as elastomer-coated wheels / tires, which must be replaced with new wheels when they reach a defined wear level. This requires lifting the corresponding wheels off the road surface. This lifting of the wheels can be carried out in a simple, quick, and ergonomic manner using the method according to the invention and the attachment of at least one auxiliary support device to the load-handling platform, utilizing the lifting device of the load-handling platform. In a first step, the load-handling platform is lifted in a lifting direction by actuating the lifting device, for example, to or near the maximum lifting position of the load-handling platform.In this raised position of the load-handling platform, at least one auxiliary support device is then attached to the platform in a second step, for example, using fastening screws. The platform is preferably raised such that the attached auxiliary support device ends close to the road surface without touching it. In a subsequent third step, the lifting mechanism of the load-handling platform is then lowered until the wheels of at least one axle of the transport vehicle are lifted off the road surface.By lowering the lifting mechanism of the load-handling platform, the auxiliary support device attached to the platform comes into contact with the road surface. This causes the auxiliary support device to rest on the road surface, thus directly supporting the load-handling platform. Further lowering of the lifting mechanism then raises at least one of the axles, and consequently its wheels, off the road surface. In a subsequent fourth step, the wheels of the corresponding axles, now raised from the road surface, can then be easily and ergonomically removed and replaced.If only a single auxiliary support device is attached to the load-bearing platform, for example to the front of the load-bearing platform, the transport vehicle, after the auxiliary support device has been supported on the road surface, is raised in a downward direction on the side where the auxiliary support device is attached, i.e. at the front, by further actuation of the lifting device of the load-bearing platform, so that in the case of a transport vehicle with a center axle, a front axle and a rear axle, the wheels of the center axle and the wheels of the axle closest to the auxiliary support device, namely the front axle, are raised from the road surface.If only a single auxiliary support device is attached to the load-bearing platform, for example to the rear of the load-bearing platform, the transport vehicle, after the auxiliary support device has been supported on the road surface, is raised in a downward direction on the side where the auxiliary support device is attached, i.e. at the rear, by further actuation of the lifting device of the load-bearing platform, so that in the case of a transport vehicle with a center axle, a front axle and a rear axle, the wheels of the center axle and the wheels of the axle closest to the auxiliary support device, namely the rear axle, are raised from the road surface.If an auxiliary support device is attached to the load-bearing platform both at the front and at the rear, the transport vehicle, after the two auxiliary support devices have been supported on the road surface, is completely lifted in a lowering direction by further actuation of the lifting device of the load-bearing platform, so that the wheels of all axles are lifted from the road surface.

[0028] After changing the wheels, the auxiliary support device attached to the load-handling platform can be easily and quickly removed. In a subsequent fifth step, the lifting device is operated in a lifting direction until the auxiliary support device is lifted off the road surface. In a subsequent sixth step, the auxiliary support device can then be easily removed from the load-handling platform. Operating the lifting device of the load-handling platform in a lifting direction lowers the transport vehicle, so that its raised wheels regain contact with the road surface.Further activation of the lifting device of the load-handling platform in the lifting direction then results in the auxiliary support device attached to the load-handling platform being lifted from the road surface, so that the lifted auxiliary support device can be removed from the load-handling platform again.

[0029] The problem is also solved by a method for dismantling the load-bearing platform of a transport vehicle according to the invention using an auxiliary support device according to the invention, in which the following steps are carried out to dismantle the load-bearing platform from the transport vehicle: In a first step, the load-handling platform is raised by operating the lifting device in a lifting direction; in a subsequent second step, two auxiliary support devices are attached to opposite sides of the load-handling platform; in a subsequent third step, the connections between the load-handling platform and the lifting device are disconnected; in a subsequent fourth step, the lifting device is operated in a lowering direction until the auxiliary support devices come into contact with the road surface and the auxiliary support devices support the load-handling platform on the road surface; in a subsequent fifth step, the load-handling platform is removed from the transport vehicle.

[0030] The load-bearing platform and the housing of the underframe must be easily removable and dismantled for service work, such as diagnostics, maintenance, and repairs to components located inside the vehicle beneath the housing. This includes maintenance work on the lifting device, cleaning the vehicle interior beneath the housing, and visual inspections of the components inside the vehicle. Due to the high weight of the load-bearing platform, which weighs at least 30 kg, and its low height above the road surface (the platform can typically only be raised to a maximum height of approximately 340 mm above the road surface), manually lifting and transporting the platform is ergonomically inconvenient for a service person and can lead to health problems.The removal of the load-handling platform from the transport vehicle can be carried out simply, quickly, and ergonomically using the method according to the invention and the attachment of two auxiliary support devices to the load-handling platform, utilizing the lifting device of the load-handling platform. With the method according to the invention, the auxiliary support devices can thus be used for the quick, simple, and ergonomic removal of the load-handling platform from the transport vehicle. For this purpose, the auxiliary support devices are advantageously equipped with support elements designed as rollers. To dismantle the load-handling platform, in a first step, the load-handling platform is raised in a lifting direction by actuating the lifting device, for example, to or near the maximum lifting position of the load-handling platform.With the load-handling platform in this raised position, two auxiliary support devices are then attached to opposite sides of the platform in a second step, for example, using fastening screws. The platform is preferably raised in such a way that the attached support devices end close to the road surface without touching it. In a subsequent third step, the connections between the lifting device and the load-handling platform are disconnected. If the lifting device has multiple threaded spindles, the mechanical connections of the threaded spindles to the platform are disconnected. The lifting device is then lowered.By lowering the lifting mechanism of the load-handling platform, the auxiliary support devices attached to the platform come into contact with the road surface. This causes the rollers of the support devices to rest on the road surface and support the load-handling platform. The support devices thus directly brace the platform against the road surface. Further lowering of the lifting mechanism then releases the threaded spindles of the lifting mechanism from contact with the platform, allowing the platform to be easily moved on the rollers of the support devices and removed from the transport vehicle.The housing can then be easily and quickly removed from the base to allow good access to the components inside the vehicle.

[0031] The subsequent assembly of the load-bearing platform onto the transport vehicle is carried out in reverse order, whereby the following steps are performed for the subsequent assembly of the load-bearing platform onto the transport vehicle: In a subsequent sixth step, the load-handling platform is moved over the transport vehicle; in a subsequent seventh step, the lifting device is operated in a lifting direction until the lifting device comes into contact with the load-handling platform; in a subsequent eighth step, the connections between the lifting device and the load-handling platform are established; in a subsequent ninth step, the auxiliary support devices are removed from the load-handling platform.

[0032] In the sixth step, the load-handling platform is moved over the transport vehicle, for example, by moving the platform on the rollers of the auxiliary support device. Then, in the seventh step, the lifting device can be operated in a lifting direction until it makes contact with the load-handling platform. In the eighth step, the mechanical connections between the lifting device and the load-handling platform are re-established, for example, by reconnecting the threaded spindles. Further operation of the lifting device then raises the auxiliary support device attached to the platform from the road surface, allowing it to be removed from the platform.

[0033] With at least one auxiliary support device temporarily attached to the load-bearing platform, a simple auxiliary device can be formed for lifting the transport vehicle and for the ergonomic dismantling of the load-bearing platform, which facilitates service, for example changing the tires of the wheels of the axles of the transport vehicle and / or ergonomically favorable dismantling of the load-bearing platform for access to the components located under the housing of the underframe.

[0034] Further advantages and details of the invention are explained in more detail with reference to the exemplary embodiment shown in the schematic figures. Here, Figure 1 shows a driverless transport vehicle according to the invention in a perspective view; Figure 2 shows the transport vehicle of the Figure 1 with raised load-handling platform, Figure 3 the transport vehicle of the Figure 1 and 2without housing, Figure 4 the transport vehicle of the Figure 2 with raised load-bearing platform and load carrier on it, Figure 5, the transport vehicle of the Figures 1 to 4 with raised load-bearing platform and attached auxiliary support devices and Figure 6 a section of the Figure 5 in an enlarged view.

[0035] In the Figures 1 to 4 Figure 1 shows a driverless, in particular autonomous, transport vehicle 1 according to the invention. The transport vehicle 1 is designed for the horizontal transport of a [material / object] in the Figure 4 The illustrated load carrier LT is designed, for example, a pallet or a trolley. In the Figure 4 Figure 1 shows a load carrier LT designed as a trolley, which carries a pallet P with a load LA on it.

[0036] The transport vehicle 1 has a mobile underframe 2, which is equipped with a support frame 3 and a chassis 4, and a load-bearing platform 5 arranged above the underframe 2 for receiving the load carrier LT.

[0037] The substructure 2 has an outer housing 6 arranged on the support frame 3 as a covering, under which the support frame 3 and the chassis 4 are arranged. Figure 1 , 2 and 4 The transport vehicle 1 with the housing 6 is shown. In the Figure 3 Case 6 is not shown.

[0038] In the illustrated embodiment, the load-bearing platform 5 is arranged on the support frame 3 in a way that allows it to be raised and lowered vertically. For this purpose, a [missing information] is attached to the support frame 3 in the Figures 2 to 4The lifting device 7 shown is provided, which is connected to the load-handling platform 5. The lifting device 7 consists, for example, of several threaded spindles driven by an electric lifting motor, which are mechanically connected to the load-handling platform 5, for example by connecting screws.

[0039] The support frame 3 and the chassis 4 are arranged vertically below the load-handling platform 5. The transport vehicle 1 is thus designed as a flat and compact self-propelled transport vehicle that allows the load carrier LT to be driven underneath and the load carrier LT to be lifted by the load-handling platform 5 in order to transport and set down the load carrier LT horizontally. Navigation and control of the transport vehicle 1 are automatic or autonomous; alternatively, remote operation of the transport vehicle 1 is also possible.

[0040] The chassis 4 of the transport vehicle 1 according to the invention has at least two axles. In the illustrated embodiment, the chassis consists of three axles and is formed by a central axle 10 with two non-steered wheels 10a, 10b, a front axle 11 with at least one steered wheel unit 11a, and a rear axle 12 with at least one steered wheel unit 12a. The front axle 11 is arranged at a distance forward from the central axle 10 in the longitudinal direction L of the transport vehicle 1. Similarly, the rear axle 12 is arranged at a distance rearward from the central axle 10 in the longitudinal direction L of the transport vehicle 1.

[0041] In the illustrated embodiment, the two wheels 10a, 10b of the central axle 10 are each designed as a drive wheel, each driven by a drive unit, for example, an electric drive unit. The central axle 10 is thus designed as a drive axle with two drive units. Each drive unit can be an electric traction motor that drives the corresponding wheel 10a, 10b directly or via a gearbox. The two drive units can be controlled or regulated independently of each other in terms of speed and direction of rotation, so that the transport vehicle 1 can be steered and turned on the spot by different speeds and directions of rotation of the two wheels 10a, 10b.

[0042] In the illustrated embodiment, the wheel unit 11a of the front axle 11 is designed as a non-driven and passively steered wheel unit 11a. The wheel unit 11a is rotatably mounted about a vertical axis by means of a corresponding bearing. The wheel unit 11a is provided with a caster angle and is passively steered by the caster angle.

[0043] The wheel unit 11a of the front axle 11 is arranged centrally in the transverse direction Q of the transport vehicle 1.

[0044] The wheel unit 11a of the front axle 11 is designed as a double wheel with two wheels 20, 21 arranged laterally apart from each other.

[0045] In the illustrated embodiment, the wheel unit 12a of the rear axle 12 is designed as a non-driven and passively steered wheel unit 12a. The wheel unit 12a is rotatably mounted about a vertical axis by means of a corresponding bearing. The wheel unit 12a is provided with a caster angle and is passively steered by the caster angle.

[0046] The wheel unit 12a of the rear axle 12 is arranged centrally in the transverse direction Q of the transport vehicle 1.

[0047] The wheel unit 12a of the rear axle 12 is designed as a double wheel with two wheels arranged laterally apart from each other.

[0048] In the Figure 1 The load-bearing platform 5 is shown in a lowered position, in which the load-bearing platform 5 is located directly above the housing 6 of the base frame 2. In the Figure 2 and the Figure 4 The load-bearing platform 5 is shown in the raised position. As can be seen from the Figure 4 As can be seen, the rollers R of the load carrier LT, which is designed as a rolling cart, are lifted from a road surface FB.

[0049] From the Figure 4 It is further evident that the load LA transported on the load handling platform 5 is often larger than the base area of ​​the transport vehicle 1, so that the transported load LA extends beyond the outer contour of the transport vehicle 1.

[0050] The housing 6 is attached to the support frame 3. Furthermore, other components of the driverless transport vehicle 1, not shown in detail, are attached to the support frame 3 inside the housing 6, such as a battery, the electric lifting motor of the lifting device 7, electronic controls for controlling the electric drive units of the two wheels 10a, 10b and for controlling the lifting motor, as well as sensors, for example, sensors for environmental monitoring and / or for navigation of the driverless transport vehicle.

[0051] The load-bearing platform 5 of the transport vehicle 1 is equipped with at least one fastening interface 30a, 30b for the temporary fastening of a [missing information] in the Figures 5 and 6 The auxiliary support device 40a, 40b shown is provided. With the auxiliary support device 40a, 40b, the load-bearing platform 5 can be supported directly on the road surface FB.

[0052] In the illustrated embodiment, the fastening interface 30a, 30b is formed by, for example, two receiving bores 31 for fastening screws 32 formed in the load-bearing platform 5.

[0053] In the illustrated embodiment, a fastening interface 30a, 30b for attaching an auxiliary support device 40a, 40b is provided on opposite sides of the load-bearing platform 5. The fastening interface 30a is located on the front of the load-bearing platform 5 and the fastening interface 30b is located on the rear of the load-bearing platform 5.

[0054] The auxiliary support device 40a, 40b is each provided with a fastening interface which cooperates complementarily with the fastening interface 30a or 30b of the load-bearing platform 5.

[0055] The fastening interface of the auxiliary support device 40a, 40b is formed by receiving bores for the fastening screws 32 formed in the auxiliary support device 40a, 40b, which have the same hole pattern as the receiving bores 31 in the load-bearing platform 5.

[0056] The auxiliary support device 40a or 40b is each provided with support means 41a, 41b, by means of which the auxiliary support device 40a, 40b attached to the load-bearing platform 5 can be supported on the road surface FB in order to support the load-bearing platform 5 directly on the road surface FB.

[0057] In the illustrated embodiment, the support means 41a, 41b are designed as rollers. The rollers can be fixed or swivel casters. Furthermore, a braking device 42 can be provided on one or both rollers of an auxiliary support device 40a, 40b.

[0058] In the illustrated embodiment, the auxiliary support device 40a, 40b consists of a Z-shaped component having a base plate 45 on which the support means 41a, 41b are arranged. A vertical leg element 46, formed in the illustrated embodiment by two vertical struts 46a, 46b, extends upwards from the base plate 45 and transitions into a horizontal leg element 47, formed in the illustrated embodiment by two horizontal struts 47a, 47b. The horizontal leg element 47 is provided with the fastening interface of the auxiliary support device 40a, 40b, for which purpose, in the illustrated embodiment, a receiving bore for a fastening screw 32 is formed in each of the horizontal struts 47a, 47b.

[0059] In the Figure 5A first auxiliary support device 40a is attached to the fastening interface 30a located on the front of the load-bearing platform 5 and a second auxiliary support device 40b is attached to the fastening interface 30b located on the rear of the load-bearing platform 5 by means of corresponding fastening screws 32.

[0060] With the auxiliary support devices 40a, 40b attached to the load-bearing platform 5, the underframe 2 can be raised by means of the lifting device 7, thereby lifting the wheels of axles 10, 11, 12 off the road surface FB to perform a tire change. Alternatively or additionally, the load-bearing platform 5 can be detached from the underframe 2 using the auxiliary support devices 40a, 40b attached to the load-bearing platform 5 and moved on the support elements 41a, 41b, which are designed as rollers, and pushed away from the underframe 2. In the illustrated embodiment, the rollers of the auxiliary support devices 40a, 40b are provided with pivot axes extending in the longitudinal direction L of the vehicle, so that the load-bearing platform 5 can be moved in the transverse direction Q of the vehicle on the rollers of the auxiliary support devices 40a, 40b for detachment from the underframe 2.

Claims

1. Driverless transport vehicle (1), in particular for the transport of load carriers, which has a supporting frame (3), a chassis (4) and a load-bearing platform (5) for receiving a load carrier, wherein the load-bearing platform (5) is arranged on the supporting frame (3) such that it can be raised and lowered in the vertical direction by means of a lifting device (7), and the supporting frame (3) and the chassis (4) are arranged below the load-bearing platform (5) in the vertical direction, wherein the chassis (4) has at least two axles (10; 11; 12), in particular a central axle (10) with two non-steered wheels (10a, 10b), a front axle (11) with at least one steered wheel unit (11a), and a rear axle (12) with at least one steered wheel unit (12a), characterized in that the load-bearing platform (5) is provided with at least one fastening interface (30a; 30b) for the temporary fastening of an auxiliary support device (40a; 40b), by means of which the load-bearing platform (5) can be supported directly on a roadway surface (FB).

2. Driverless transport vehicle according to Claim 1, characterized in that the fastening interface (30a; 30b) is formed by receiving bores (31), formed in the load-bearing platform (5), for fastening screws (32).

3. Driverless transport vehicle according to Claim 1 or 2, characterized in that in each case one fastening interface (30a, 30b) for fastening an auxiliary support device (40a, 40b) is provided on opposite sides of the load-bearing platform (5).

4. Driverless transport vehicle according to Claim 3, characterized in that one fastening interface (30a) is formed on the front side and one fastening interface (30b) is formed on the rear side of the load-bearing platform (5).

5. System comprising a driverless transport vehicle (1) according to one of Claims 1 to 4 and at least one auxiliary support device (40a; 40b), characterized in that the auxiliary support device (40a; 40b) is provided with a fastening interface which interacts complementarily with the fastening interface (30a; 30b) of the load-bearing platform (5).

6. System according to Claim 5, characterized in that the fastening interface is formed by receiving bores, formed in the auxiliary support device (40a; 40b), for fastening screws (32).

7. System according to Claim 5 or 6, characterized in that the auxiliary support device (40a; 40b) is provided with support means (41a; 41b), by means of which the auxiliary support device (40a; 40b) can be supported on the roadway surface (FB).

8. System according to Claim 7, characterized in that the support means (40a; 41b) are in the form of rollers.

9. Method for tyre replacement of the wheels of at least one of the axles (10; 11; 12), in particular of the wheels (10a; 10b) of the central axle (10) and / or of the wheels (20; 21) of the front axle (11) and / or of the wheels of the rear axle (12), of a transport vehicle (1) according to one of Claims 1 to 4 using an auxiliary support device (40a; 40b) of a system according to one of Claims 5 to 8, characterized in that the following steps are carried out for tyre replacement: • in a first step, lifting the load-bearing platform (5) by means of actuation of the lifting device (7) in a lifting direction; • in a subsequent second step, fastening at least one auxiliary support device (40a; 40b) to the load-bearing platform (5); • in a subsequent third step, actuating the lifting device (7) in a lowering direction until the wheels of at least one of the axles (10; 11; 12) of the transport vehicle (1) are lifted off the road surface (FB); • in a subsequent fourth step, changing the wheels lifted off the road surface (FB).

10. Method according to Claim 9, characterized in that the following steps are carried out after the change of the wheels: • in a subsequent fifth step, actuating the lifting device (7) in a lifting direction until the auxiliary support device (40a; 40b) is lifted off the road surface (FB); • in a subsequent sixth step, dismantling the auxiliary support apparatus (40a; 40b) from the load-bearing platform (5).

11. Method for dismantling the load-bearing platform (5) of a transport vehicle (1) according to one of Claims 1 to 4 using an auxiliary support device (40a; 40b) of a system according to one of Claims 5 to 8, characterized in that the following steps are carried out for dismantling the load-bearing platform (5) from the transport vehicle (1): • in a first step, lifting the load-bearing platform (5) by means of actuation of the lifting device (7) in a lifting direction; • in a subsequent second step, fastening two auxiliary support devices (40a, 40b) to opposite sides of the load-bearing platform (5); • in a subsequent third step, separating the connections of the load-bearing platform (5) to the lifting device (7); • in a subsequent fourth step, actuating the lifting device (7) in a lowering direction until the auxiliary support devices (40a, 40b) come into contact with the roadway surface (FB) and the auxiliary support devices (40a, 40b) support the load-bearing platform (5) on the roadway surface (FB); • in a subsequent fifth step, removing the load-bearing platform (5) from the transport vehicle (1).

12. Method according to Claim 11, characterized in that the following steps are carried out for the subsequent installation of the load-bearing platform (5) on the transport vehicle (1): • in a subsequent sixth step, moving the load-bearing platform (5) over the transport vehicle (1); • in a subsequent seventh step, actuating the lifting device (7) in a lifting direction until the lifting device (7) comes into contact with the load-bearing platform (5); • in a subsequent eighth step, establishing the connections of the lifting device (7) to the load-bearing platform (5); • in a subsequent ninth step, dismantling the auxiliary support devices (40a, 40b) from the load-bearing platform (5).

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