Chassis and its applications

Abstract

The present invention relates to a chassis comprising a base (12) and four wheels (14), each wheel being mounted on the base via a support device (16) and configurable from a transport position to a working position and from a working position to a transport position. Each support device comprises a support arm (18) mounted on the base via a proximal end (20) configurable from a transport position to a working position and from a working position to a transport position. The support arm is provided and rotatably accommodates a journal (24) at its distal end (22); a first operating device (30) for deflecting the support arm from the transport position of the chassis to the working position and from the working position of the chassis to the transport position; a journal rotatably disposed at the distal end of the support arm; an axle (40) rotatably disposed on the journal and rotatably accommodates the wheel at the distal end (42) of the journal; and a second operating device (44) for deflecting the axle relative to the journal.

Description

Technical Field

[0001] The present invention relates to a chassis, a method for operating a movable or self-propelled work machine, workbench or the like having such a chassis, and the application of said chassis. Background Technology

[0002] Such chassis or frames are generally known. These chassis or frames are used, for example, as the underframes of mobile or self-propelled work machinery, workbenches, or similar objects also known as cantilever cranes. A chassis typically comprises a base and four wheels, each mounted on the base via a support device. The wheels can be moved from a transport position to a working position and from a working position to a transport position. The chassis has a smaller width in the transport position than in the working position. Therefore, the support device is used to adjust the width of the chassis. Such chassis or frames are known, for example, by EP2641860B1. In practice, the assembly of the support device has proven disadvantageous. Therefore, the width is adjusted only by extending or retracting a telescopic support arm perpendicular to the longitudinal axis of the chassis and the four wheels. Consequently, very large lateral forces are applied to the individual components, such as the wheels or the chassis itself, when the chassis is moved from its transport position to its working position and from its working position to its transport position. This necessitates oversized components, including, for example, the addition of maneuvering mechanisms for extending and retracting the support arms. This, in turn, increases the chassis's weight and simultaneously reduces its maximum permissible operating weight during operation. Furthermore, prolonged load conditions generally negatively impact the chassis's service life. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide a chassis that avoids the aforementioned disadvantages, wherein the chassis is therefore structurally particularly simple and simultaneously compact and stable in construction, is not subjected to or is subjected to very little loading by lateral forces, has significantly reduced weight and has a very long service life, and is also very low in cost during operation, especially based on this; and to provide a method for operating a movable or self-propelled work machine, workbench or the like having such a chassis and to provide applications for the chassis.

[0004] The task is solved in a surprisingly simple manner in terms of device technology by means of a chassis according to the invention.

[0005] By adopting the chassis design scheme according to the present invention, a particularly simple, compact, and stable structural configuration of the chassis or frame is generally achieved. The chassis includes a base and four wheels, each wheel being mounted on the base via a support device and rotatable from a transport position to a working position and from a working position to a transport position. Each support device includes: a support arm mounted on the base via a proximal end, rotatable from the transport position to a working position and from the working position to a transport position, and rotatably receiving a journal at its distal end; a first operating device for deflecting the support arm from the transport position to the working position and from the working position to the transport position; a journal rotatably mounted at the distal end of the support arm; an axle rotatably mounted on the journal and rotatably receiving the wheel at the distal end of the journal; and a second operating device for deflecting the axle relative to the journal. By allowing for wheel positioning during the adjustment of the chassis width from the transport position to the working position and from the working position to the transport position, the wheels, other chassis components, and ultimately the chassis itself experience significantly smaller lateral forces. This results in a reduction in the dimensions of the individual components and the chassis, and consequently, significant weight savings. Correspondingly, a chassis design requiring less repair can be achieved according to the invention, and in particular, this results in a very long service life for the chassis according to the invention. The operation of the chassis according to the invention can also be designed at an extremely low overall cost.

[0006] Advantageously, the support arm is arranged on the base such that its proximal end can be rotated from the transport position to the working position and from the working position to the transport position of the chassis via a first rotation axis, and its distal end is rotatably connected to the journal via a second rotation axis.

[0007] In this regard, it is particularly advantageous that the first operating device for deflecting the support arm from the transport position of the chassis to the working position and from the working position of the chassis to the transport position is rotatably disposed on the base at the proximal end via a first rotating shaft and rotatably connected at the distal end to the journal via a second rotating shaft.

[0008] Advantageously, the second rotation axis of the support arm and the journal preferably coincides with the second rotation axis of the first operating device and the journal.

[0009] Advantageously, the first and / or the second operating devices are configured to be adjustable in length.

[0010] Furthermore, within the scope of this invention, the first operating device and / or the second operating device are configured to be hydraulically, pneumatically, mechanically, or electrically adjustable in length.

[0011] Furthermore, the first and / or the second operating device are preferably configured as, in particular, a retractable pressure cylinder, a hydraulic unit, a linear unit, a spindle unit, or a linear motor.

[0012] Of particular importance is that each support device further comprises a parallel guide, which is configured to the support arm, rotatably mounted on the base at its proximal end and rotatably connected to the journal at its distal end. With the parallel guide of the vehicle frame according to the invention, a series of other advantages can be achieved in a simple manner. On the one hand, the stability of the chassis according to the invention can thus be further improved, and therefore its service life additionally improved. On the other hand, the chassis's tracking accuracy and tracking stability can be obtained, and thus simplified, equally precise, operation of the chassis during operation can be achieved. Finally, the parallel guide provides excellent protection for the first control device against damage or even complete destruction due to operator carelessness and collisions with potential obstacles in the chassis's lane.

[0013] Furthermore, according to the present invention, the parallel guide device is disposed between the longitudinal axis of the support arm and the chassis, preferably substantially parallel to the support arm.

[0014] Advantageously, the parallel guide device and the support arm together with the base and the journal form a generally parallelogram shape.

[0015] Advantageously, the first rotation axis of the parallel guide device and the base coincides with the first rotation axis of the first operating device and the base.

[0016] Preferably, the wheels and / or the first and / or the second control devices can be controlled individually, in pairs, or all together.

[0017] Furthermore, within the scope of the present invention are: the base of the chassis according to the present invention has a rotating disk, a rotating flange or similar support device, and a structure, turret, work basket, work platform or other lifting device for transporting people and tools can be rotatably mounted via the rotating disk, the rotating flange or the similar support device.

[0018] The task is also solved in an unexpectedly simple way in terms of methodological technique by means of the method according to the invention.

[0019] Therefore, a method is proposed for operating a movable or self-propelled work machine, workbench, or the like with a chassis, wherein the wheels are respectively oriented at an angle to the longitudinal axis of the chassis on the support device to respectively place or adjust the width of the chassis from a transport position to a working position and from a working position to a transport position, such that the wheels are respectively guided or oriented on, substantially on, or parallel to the pitch circle, causing the support device to deflect or move about or on the pitch circle.

[0020] Finally, also within the scope of this invention are: the chassis used for movable, traversable, liftable and lowerable, self-propelled working machinery, workbenches, work baskets, work platforms, excavators, excavating machines, stepping excavators, engineering instruments and machinery, boom cranes, earthmoving machinery, earthmoving rigs, lifting platforms, lifting devices for transporting people and materials, elevators, lifting workbenches, lifting platforms, lifting platforms, cranes, rotary cranes, engineering and load cranes, truck cranes, bridge cranes, gantry cranes, tower cranes, crane or tool accessories or holding devices for machine tools. Attached Figure Description

[0021] Other features, advantages, and details of the invention will become apparent from the following description of preferred embodiments of the invention and with reference to the accompanying drawings. Herein:

[0022] Figure 1A and Figure 1B Perspective views of an embodiment of a chassis constructed according to the present invention in a transport position and in a working position are shown;

[0023] Figures 2A to 2D Show Figure 1A and Figure 1B A top view of the chassis constructed according to the present invention, for illustrating the adjustable width from the transport position via the first intermediate position and the second intermediate position to the working position and from the working position via the first intermediate position and the second intermediate position to the transport position.

[0024] Figure 3A and Figure 3B Showing the corresponding Figure 2A and Figure 2B or Figure 2C and Figure 2D A schematic top view of the embodiment of the chassis constructed according to the present invention;

[0025] Figures 4A to 4C Showing according to Figures 1A to 3B The embodiment of the chassis constructed according to the present invention Figure 4AA side view and two sectional views of line IV-IV in the diagram;

[0026] Figure 5 Showing the corresponding Figures 2A to 2D A schematic top view of the embodiment of the chassis constructed according to the present invention;

[0027] Figure 6A and Figure 6B Perspective views of another embodiment of the chassis constructed according to the present invention in the transport position and in the working position are shown;

[0028] 7A to 7D Show Figure 6A and Figure 6B A top view of another embodiment of the chassis constructed according to the present invention, for illustrating the adjustable width from the transport position via the first intermediate position and the second intermediate position to the working position and from the working position via the first intermediate position and the second intermediate position to the transport position.

[0029] Figure 8A and Figure 8B Showing the corresponding Figure 7A and Figure 7B or Figure 7C and Figure 7D A schematic top view of another embodiment of the chassis constructed according to the present invention;

[0030] Figures 9A to 9C Showing according to Figures 6A to 8B The embodiment of the chassis constructed according to the present invention Figure 9A A side view and two sectional views of line IX-IX; and

[0031] Figure 10 Showing the corresponding Figures 8A to 8B A schematic top view of the embodiment of the chassis constructed according to the present invention. Detailed Implementation

[0032] In the following description of different embodiments of the chassis 10 constructed according to the present invention, the same reference numerals are provided for corresponding identical components.

[0033] The chassis 10 according to the invention is advantageously used for movable, traversable, liftable and lowerable, self-propelled operating machinery, workbenches, work baskets, work platforms, excavators, excavating machines, stepping excavators, engineering instruments and machinery, cantilever cranes, earthmoving machinery, earthmoving rigs, lifting platforms, lifting devices for transporting people and materials, elevators, lifting workbenches, lifting platforms, lifting platforms, cranes, rotary cranes, engineering and load cranes, truck cranes, bridge cranes, gantry cranes, tower cranes, crane or tool accessories or holding devices for machine tools.

[0034] exist Figures 1A to 5 The diagram shows one embodiment of the chassis 10 according to the present invention. The components and working principle of the chassis are described in detail below.

[0035] Therefore, the chassis 10 includes a base 12 and four wheels 14, each wheel being mounted on the base 12 via a support device 16. The four wheels 14 can be driven from the chassis 10 by means of the support devices 16. Figure 1A The transport position is placed in the working position corresponding to Figure 1b. The chassis 10 has a smaller width in the transport position than in the working position.

[0036] In the working position, the operating machinery (not shown) is undergoing normal operation.

[0037] Without further explanation, the four wheels 14 can also be disengaged from the chassis 10 by means of the corresponding support devices 16 after the normal operation of the machinery has been completed and the work has ended. Figure 1B The work location was (relocated) back to the corresponding Figure 1A The chassis 10 is then transported, for example, on a crane transport vehicle in a cargo truck, to be moved to the next location of use.

[0038] Each support device 16 has a support arm 18.

[0039] The support arm 18 is mounted on the base 12 via the proximal end 20 in a manner that allows it to deflect from the transport position of the chassis 10 to the working position and from the working position of the chassis to the transport position. Furthermore, the support arm 18 rotatably accommodates the journal 24 on the distal end 22.

[0040] As from Figures 2A to 3B and Figures 4B to 5 As it turns out, the support arm 18 is rotatably mounted on the base 12 with its proximal end 20 via a first rotation axis 26. Furthermore, a second rotation axis 28 is provided on the distal end 22 of the support arm 18, via which the journal 24 is hinged or rotatably connected to the support arm 18.

[0041] In addition, each support device 16 includes a first actuation device 30. The first actuation device 30 is configured to deflect the support arm 18 from the transport position of the chassis 10 to the working position and from the working position of the chassis to the transport position.

[0042] The first operating device 30 is rotatably mounted on the base 12 via its proximal end 32 and rotatably connected to the journal 24 on its distal end 34. For this purpose, a first rotating shaft 36 that operates between the base 12 and the proximal end 32 of the first operating device 30 and a second rotating shaft 38 that operates between the distal end 34 and the journal 24 are provided.

[0043] exist Figures 1A to 5 In the chassis implementation, the second rotation axis 28 of the support arm 18 and the journal 24 coincides with the second rotation axis 38 of the first operating device 30 and the journal 24. This simplifies the structure and allows for continued weight savings.

[0044] As previously described, each support device 16 further includes a journal 24, which is rotatably disposed on the distal end 22 of the support arm 18.

[0045] Furthermore, each support device 16 is equipped with an axle 40 to rotatably accommodate the respective wheels 14 on the distal end 42 of the journal 24. The axle 40 itself is also hinged to the journal 24 to allow the chassis 10 to deflect when adjusting its width or widening its wheelbase from the transport position to the working position and from the working position to the transport position, and to steer the chassis 10 during normal operation.

[0046] In order to deflect the axle 40 relative to the journal 24, each support device 16 finally has a second operating device 44.

[0047] By utilizing the design of the chassis 10 according to the present invention, a particularly simple, compact, and stable overall structure of the chassis 10, or frame, can be achieved. Through the structural possibility of positioning the wheels 14 during the adjustment of the width or widening of the wheelbase of the chassis 10 from its transport position to its working position and from its working position to its transport position, the various components of the chassis 10 and ultimately the chassis 10 itself are loaded with negligible lateral forces. Therefore, the overall size of the support arm 18, the first operating device 30, the second operating device 44, or other components and the chassis 10 can be reduced, thus saving weight. Correspondingly, a design that requires less maintenance of the chassis 10 can be achieved, and in particular, an extremely long service life is thus realized. Consequently, the operation of the chassis 10 is also particularly low-cost.

[0048] The first operating device 30 and / or the second operating device 44 are preferably configured to be adjustable in length. Preferably, the first operating device 30 and / or the second operating device 44 are configured to be adjustable in length hydraulically, pneumatically, mechanically or electrically.

[0049] In practice, it has proven particularly advantageous that a retractable pressure cylinder, especially a regulating cylinder or a steering cylinder, be used as the first operating device 30 or the second operating device 44. Alternatively, it is equally advantageous for the first operating device 30 and / or the second operating device 44 to be constructed as a hydraulic unit, a linear unit, a spindle unit, or a linear motor.

[0050] Without needing to show the location in detail, it is preferable to provide individual, paired, or all common control devices for the wheel 14 and / or the first control device 30 and / or the second control device 44.

[0051] Finally, the base 12 of the chassis 10 according to the present invention is... Figures 1A to 5 Preferably, a rotating disk 46, a rotating flange, or a similar support device is provided at the center, thereby allowing structures, turrets, work baskets, work platforms, or other lifting devices (all not shown) for transporting people and tools to be rotatably mounted on the chassis 10.

[0052] The following uses Figures 2A to 2D Detailed explanation of the method according to the invention for adjusting the width, or widening the wheelbase, of the chassis 10 of the invention for, for example, self-propelled operating machinery, from a transport position to a working position: In Figure 2A In the transport position shown, the brakes on wheel 14 are first released, allowing wheel 14 to rotate freely. This avoids load and wear on wheel 14, as well as scratches on the ground or foundation.

[0053] Then, wheel 14 in Figure 2B The first intermediate position shown is positioned at a certain angle, which tangentially abuts against a (partial) circular trajectory of the respective support arms 18. Preferably, precise control is achieved via an angle sensor or a length sensor (not shown), which is located in a second operating device 44, such as a steering cylinder.

[0054] In other words, the wheels 14 are oriented at a certain angle to the longitudinal axis 48 of the chassis 10 on the support device 16 to respectively position or adjust the width of the chassis 10 from the transport position to the working position and from the working position to the transport position. Here, the wheels 14 are guided or oriented on, substantially on, or parallel to the pitch circle, and the support device 16 deflects or moves about the pitch circle / on the pitch circle from the transport position to the working position and from the working position to the transport position.

[0055] Corresponding to Figure 2C The support arm 18 is then positioned in a second intermediate position via the first operating device 30, which is the first intermediate position, in which the support arm 18 is also approximately parallel to the longitudinal axis 48 of the chassis 10.

[0056] In the second intermediate position, the support arm 18 is flipped (out) or spread out to a certain extent away from the longitudinal axis 48 of the chassis 10. Here, precise control is again preferably achieved via an angle sensor or a length sensor located in the second operating device 44. The wheels 14 simply rotate together.

[0057] After the second intermediate position, the wheels 14 finally move in the working position via the second operating device 44, such as the steering cylinder, parallel to each other or parallel to the longitudinal axis 48, as from Figure 2D As can be seen. Here, it is also preferable to re-implement precise control via the angle sensor or the length sensor in the second operating device 44.

[0058] In corresponding Figure 2D In the working position, the brake of wheel 14 is closed.

[0059] Therefore, the method for adjusting the width or widening the wheel track of the chassis 10 according to the present invention is terminated.

[0060] The work machinery (not shown) has been replaced to normal operation and is now provided to the operator for use in the prescribed work.

[0061] After the normal operation of the machinery is completed and put into use, the above process is performed in reverse order. Therefore, the four wheels 14 are connected to the corresponding support devices 16 via... Figure 1B The working position of the chassis 10 is transferred back through two intermediate positions to the corresponding Figure 1A The chassis 10 is then transported, for example, on a crane transport vehicle in a cargo truck, to be moved to the next location of use.

[0062] exist Figure 3A Or rather Figure 3BThe diagram illustrates or summarizes the corresponding steering adjustments of the four wheels 14 from the transport position of the chassis (10) to the first intermediate position or finally from the second intermediate position to the working position, and vice versa.

[0063] exist Figures 4A to 4C The hinge portion of the first operating device 30 is particularly explained.

[0064] Figure 5 Finally, the full steering positions of the four wheels 14 and the related positions of the support device 16 are shown in the transport position in the two intermediate positions and in the working position (partially indicated by dashed lines).

[0065] exist Figures 6A to 10 Another embodiment of the chassis 10 according to the present invention is shown in the figure.

[0066] according to Figures 6A to 10 Implementation methods and Figures 1A to 5 The implementation method differs substantially in that each support device 16 additionally includes a parallel guide device 50.

[0067] For example, a parallel guide device 50 in the form of another support arm in the aforementioned embodiment of the chassis 10 (as from...) Figures 6A to 10 As it is determined, the parallel guide device 50 is designed to be smaller than the support arm 18 in terms of its dimensions or size determination. However, without going into detail, the parallel guide device 50 can also have the same or even larger dimensions or size determination as the support arm 18. This is mainly related to the force and moment relationships that arise and can be structurally adapted arbitrarily and individually to the corresponding load characteristics of the chassis 12.

[0068] Although Figures 1A to 5 The implementation of the chassis 10 has been well proven in practice, and the parallel guide device 50 of the vehicle frame 10 according to the invention can also additionally improve the overall stability of the chassis 10 and extend its service life. Furthermore, this results in improved tracking accuracy and tracking stability of the chassis 10. Consequently, simplified and equally precise operation of the chassis 10 during operation is also achieved. Finally, the parallel guide device 50 can protect the first control device 30 from damage or even complete destruction, for example, in the event of a collision with an obstacle in the chassis 10's lane due to the operator's inadvertent neglect.

[0069] In chassis 10 Figures 6A to 10In the embodiment shown, each parallel guide device 50 is assigned to a corresponding support arm 18. Here, each parallel guide device 50 is rotatably mounted on the base 12 via its proximal end 52 and rotatably connected to the journal 24 at its distal end 54. For this purpose, a first rotation shaft 56 is provided between the base 12 and the proximal end 52 of the parallel guide device 50, and a second rotation shaft 58 is provided between the distal end 54 and the journal 24.

[0070] Such as especially by Figures 7A to 8B and Figures 9B to 10 As can be deduced, the parallel guide device 50 is disposed between the support arm 18 and the longitudinal axis 48 of the chassis 10. The parallel guide device 50 is oriented substantially parallel to the corresponding support arm 18. Preferably, the parallel guide device 50 and the support arm 18 together with the base 12 and the journal 24 form, for example, a parallelogram.

[0071] exist Figures 6A to 10 In the chassis implementation, the first rotation axis 56 of the parallel guide device 50 and the base 12 coincides with the first rotation axis 36 of the first operating device 30 and the base 12. This simplifies the structure and enables weight savings.

[0072] In other respects, the chassis 10 according to the present invention is in accordance with Figures 1A to 5 and according to Figures 6A to 10 The two implementation methods are consistent. For this purpose, see [link to relevant documentation]. Figures 1A to 5 The implementation method has been described above.

[0073] This invention is not limited to the embodiments shown. Without detailed description, it is possible that different embodiments of the chassis 10 or frame and its various components according to the invention can be combined individually and arbitrarily with each other. The same applies to the methods and applications according to the invention. Therefore, for example, it is possible that the second rotation axis 28 of the support arm 18 and the journal 24 is constructed separately from the second rotation axis 38 of the first operating device 30 and the journal 24, either on or beside the journal 24. (The last sentence appears to be incomplete and possibly refers to a different invention.) Figures 1A to 10 The illustrated embodiment (in which the rotating shafts 28, 38 and 36, 56 overlap) is similarly possible, without detailed description, by constructing the rotating shafts 28 and 38 and / or the rotating shafts 36 and 56 separately or independently, i.e. unrelated to each other, i.e. non-overlapping, and setting them at different locations on the base 12 and the journal 24.

Claims

1. A chassis comprising a base (12) and four wheels (14), each wheel being mounted on the base (12) via a support device (16) and capable of being moved from a transport position to a working position and from a working position to a transport position of the chassis (10), wherein, Each support device (16) includes: Support arm (18), which is disposed on the base (12) via the proximal end (20) in such a way that it can be deflected from the transport position of the chassis to the working position and from the working position of the chassis to the transport position, and rotatably accommodates the journal (24) on the distal end (22). A first operating device (30) for deflecting the support arm (18) from the transport position of the chassis to the working position and from the working position of the chassis to the transport position. A journal (24) is rotatably provided on the distal end (22) of the support arm (18). A wheel axle (40), which is rotatably mounted on the journal (24) and rotatably accommodates the wheel (14) at the distal end (42) of the journal (24); and A second actuation device (44) for deflecting the axle (40) relative to the journal (24).

2. The chassis according to claim 1, characterized in that, The support arm (18) is arranged on the base (12) with the proximal end (20) via a first rotating shaft (26) in such a way that it can be rotated from the transport position of the chassis to the working position (10) and from the working position of the chassis to the transport position, and is rotatably connected to the journal (24) via a second rotating shaft (28) at the distal end (22).

3. The chassis according to claim 2, characterized in that, The first operating device (30) for deflecting the support arm (18) from the transport position of the chassis (10) to the working position and from the working position of the chassis to the transport position is rotatably mounted on the base (12) via a first rotating shaft (36) at the proximal end (32) and rotatably connected to the journal (24) via a second rotating shaft (38) at the distal end (34).

4. The chassis according to claim 3, characterized in that, The second rotation axis (28) of the support arm (18) and the journal (24) coincides with the second rotation axis (38) of the first operating device (30) and the journal (24).

5. The chassis according to any one of claims 1 to 4, characterized in that, The first operating device (30) and / or the second operating device (44) are configured to be adjustable in length.

6. The chassis according to any one of claims 1 to 4, characterized in that, The first operating device (30) and / or the second operating device (44) are configured to adjust length hydraulically, pneumatically, mechanically or electrically.

7. The chassis according to any one of claims 1 to 4, characterized in that, The first operating device (30) and / or the second operating device (44) are configured as a hydraulic unit, a linear unit or a spindle unit.

8. The chassis according to any one of claims 1 to 4, characterized in that, The first operating device (30) and / or the second operating device (44) are configured as pressure cylinders.

9. The chassis according to any one of claims 1 to 4, characterized in that, The first operating device (30) and / or the second operating device (44) are configured as a retractable hydraulic unit, linear unit or spindle unit.

10. The chassis according to any one of claims 1 to 4, characterized in that, The first operating device (30) and / or the second operating device (44) are configured as retractable pressure cylinders.

11. The chassis according to claim 7, characterized in that, The linear unit is a linear motor.

12. The chassis according to claim 3, characterized in that, Each support device (16) also has a parallel guide (50) configured on the support arm (18), rotatably mounted on the base (12) at the proximal end (52) and rotatably connected to the journal (24) at the distal end (54).

13. The chassis according to claim 12, characterized in that, The parallel guide device (50) is disposed between the support arm (18) and the longitudinal axis (48) of the chassis (10).

14. The chassis according to claim 13, characterized in that, The parallel guide device (50) is disposed substantially parallel to the support arm (18) between the support arm (18) and the longitudinal axis (48) of the chassis (10).

15. The chassis according to claim 12, characterized in that, The parallel guide device (50) and the support arm (18), together with the base (12) and the journal (24), generally form a parallelogram shape.

16. The chassis according to claim 12, characterized in that, The first rotation axis (56) of the parallel guide device (50) and the base (12) coincides with the first rotation axis (36) of the first operating device (30) and the base (12).

17. The chassis according to any one of claims 1 to 4, characterized in that, The wheel (14) and / or the first control device (30) and / or the second control device (44) can be controlled individually or in pairs.

18. The chassis according to any one of claims 1 to 4, characterized in that, The wheel (14) and / or the first control device (30) and / or the second control device (44) can all be constructed in a manner that allows for joint control.

19. The chassis according to any one of claims 1 to 4, characterized in that, The base (12) has a support device and a lifting structure that can be rotatably provided via the support device.

20. The chassis according to claim 19, characterized in that, The support device is a rotating disk (46).

21. The chassis according to claim 19, characterized in that, The lifting structure is a turret.

22. The chassis according to claim 19, characterized in that, The lifting structure is a work basket.

23. The chassis according to claim 19, characterized in that, The lifting structure is the working platform.

24. The chassis according to claim 19, characterized in that, The lifting structure is a lifting device used for transporting people and tools.

25. A method for operating movable work machinery having a chassis according to any one of claims 1 to 24, characterized in that, The wheels (14) are oriented at a certain angle to the longitudinal axis (48) of the chassis (10) on the support device (16) to respectively place the chassis (10) from the transport position to or adjust its width to the working position and from the working position to or adjust its width to the transport position, so that the wheels (14) are guided or oriented on or parallel to the pitch circle, so that the support device (16) moves on the pitch circle.

26. The method according to claim 25, characterized in that, The movable working machine is a workbench.

27. The method according to claim 25, characterized in that, The movable operating machinery is capable of self-driving.

28. The method according to any one of claims 25 to 27, characterized in that, The support device (16) deflects about the pitch circle.

29. The chassis according to any one of claims 1 to 24 is used in mobile work machinery.

30. The application according to claim 29, characterized in that, The operating machinery is capable of movement.

31. The application according to claim 29, characterized in that, The operating machinery is capable of being raised and lowered.

32. The application according to claim 29, characterized in that, The operating machinery is self-propelled.

33. The application according to claim 29, characterized in that, The operating machinery is a workbench, an excavator, a lifting device for transporting people and materials, or a holding device for machine tools.

34. The application according to claim 29, characterized in that, The machinery used in the operation is engineering equipment.

35. The application according to claim 29, characterized in that, The machinery being operated is construction machinery.

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