Device for transmitting compressed air or control and / or working pressure in a cardan shaft device

Abstract

The invention relates in particular to a device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, between a first fluid duct 4 accommodated or formed in at least a partial area of ​​the interior of a first, in particular transmission-side, cardan shaft part 3 and a second fluid duct 6 accommodated or formed in at least a partial area of ​​the interior of a second, in particular wheel-side, cardan shaft part 5 articulated to an end area of ​​the first cardan shaft part 3, which has a duct section 7 fluidly connected or fluidly connectable to the first fluid duct 4 and to the second fluid duct 6, the length of which can be reversibly changed.

Description

[Technical Field]

[0001] explanation The present invention generally relates to a system for transmitting a pressurized medium, particularly compressed air or control and / or actuation pressure, particularly in a drive shaft having a rotatably supported vehicle tire.

[0002] According to an aspect of the invention, the invention relates in particular to a rotation transmission device for transmitting a control pressure and / or working pressure or a pressurized medium, for example compressed air, to a fluid duct contained or formed in at least a partial area inside a shaft, in particular a drive shaft.

[0003] According to a further aspect, the invention relates to a system comprising such a rotation transmission device and a shaft on which the rotation transmission device is mounted, the shaft being embodied in particular as a drive shaft of a vehicle.

[0004] The present invention further relates to a tire pressure regulation system for at least one wheel having a pneumatic tire and driven in rotation relative to the vehicle body of a wheeled vehicle having at least one drive shaft for driving the wheel, wherein a fluid duct is housed or formed inside the drive shaft and at least one rotation transmission device is provided for supplying and / or discharging pressurized fluid to and / or from the fluid duct housed or formed in the drive shaft, as required. [Background technology]

[0005] Vehicle tires are typically filled with compressed air. Filling with other pressurized media, such as nitrogen, is also conceivable. Vehicle tires within the meaning of the present disclosure can be, for example, tubed or tubeless tires. Vehicle tires are used, for example, on passenger cars, buses, commercial vehicles, and also on aircraft.

[0006] Conventional vehicle tires are typically supplied with a pressurized medium, i.e., compressed air or nitrogen filling, via an external connection. Standard valves are commonly used for this purpose. Depending on the respective application and operating conditions, vehicle tires typically have one optimal operating / filling pressure. For example, for land vehicles such as cars, buses, and trucks, there is an operating pressure or pressure range that can ensure the best possible rolling resistance, lateral guidance, longitudinal guidance, heat generation, and / or wear behavior.

[0007] For example, the actual pressure present in a tire may vary within certain limits depending on the ambient or operating temperature. Furthermore, in the long term, certain pressure drops, such as the so-called "creeping" pressure drop, often cannot be completely avoided.

[0008] Systems for vehicles are known that allow monitoring of the operating / filling pressure in tires. These can be so-called active or passive systems. For example, a passive system can be designed to determine and compare the rolling circumferences of the tires on one axle. If a significant difference is found, this indicates a pressure difference in the respective tires. Active systems that measure and / or monitor compressed air typically include a sensor for detecting pressure that is integrated into the wheel assembly. Such a pressure sensor can be configured, for example, to transmit a corresponding pressure signal from the (rotating) tire to a fixed component of the vehicle, either wirelessly or by wire.

[0009] Furthermore, systems are generally known that allow for self-sufficient adjustment of the inflation pressure of vehicle tires. Such systems can be found, for example, on off-road vehicles, military vehicles, and similar specialized vehicles. In principle, the systems can be configured to allow for adjustment of the inflation pressure when the vehicle is idling, i.e., when the vehicle is not moving.

[0010] Known systems for self-contained pressure regulation in vehicles have a central structure. In other words, this means that there is only one device for supplying pressurized medium for filling tires. It is also conceivable to provide several devices for supplying pressurized medium, for example, in combination with a tractor machine and a trailer or semi-trailer. Nevertheless, such a central supply of compressed air is provided in particular for filling several wheel assemblies on different axles or shafts.

[0011] For this purpose, a central compressed air / pressurized medium supply unit is connected to the wheel assemblies. The supply unit is therefore typically mounted on the chassis or body of the vehicle. The supply unit may include, for example, a compressor or air compressor.

[0012] Starting from the supply unit, it is necessary to lay multiple compressed air or pressurized medium lines to the individual wheel assemblies, whereby multiple so-called rotary lead-throughs for the pressurized medium lines must be provided regularly, since the tires of the wheel assemblies are typically rotatably mounted on the axles of the vehicle.

[0013] In contrast to rotary transmission devices that serve to transmit control and / or working pressure or a corresponding pressurized medium from a fixed axle to a wheel assembly that is rotating relative to the axle, rotary transmission devices that transmit control and / or working pressure or that transmit a pressurized medium to a rotating shaft of a vehicle, in particular a drive shaft, present particular challenges, since only particularly small design spaces are available to accommodate or integrate such rotary transmission devices. This is particularly true for drive shafts that are provided with articulating heads to balance the movements corresponding to the steering movements.

[0014] Typically, a rotary conduit for transmitting control pressure and / or operating pressure or for transmitting a pressurized medium comprises, for example, a stator ring and a rotor ring annularly mounted on the outside of the axle body of the shaft. Rotary conduits within the axle body have traditionally involved high manufacturing costs and significant risks. This is true, for example, for off-road vehicles with all-wheel drive and external planetary gear trains. Failure of the rotary conduit within the axle body can result in air intrusion into the axle housing, which can cause axle gear train oil to leak through the gear train vents.

[0015] To increase the service life of the rotary conduit and the operational safety of tire pressure regulation systems, tire pressure regulation systems are increasingly equipped with special switching valves on the wheels, which supply air pressure to the rotary conduit only during the regulation process.However, as the diameter increases, the sliding speed and especially the friction torque increase sharply, so the service life of rotary conduits with larger diameters and conventional seals must be evaluated very carefully.

[0016] In particular, when a rotary lead or rotary transmission device is associated with the cardan shaft, a particular weak point exists in the transition area of ​​the articulation head of the cardan shaft.

[0017] The fluid ducts accommodated or formed in the cardan shaft and loaded with a pressurized medium, in particular compressed air or control and / or working pressure, if necessary with the aid of a rotation transmission or a rotation conduit, are subjected to increased stresses in the region of the articulation head of the cardan shaft, since the articulation head connects the first, transmission-side cardan shaft section of the cardan shaft with the second, wheel-side cardan shaft section, and the fluid ducts are subjected to increased stresses during vehicle operation, in particular during steering movements, due to possible relative movements between the wheel-side cardan shaft section and the transmission-side cardan shaft section. Summary of the Invention

[0018] In view of this, the present invention is based on the fundamental problem of optimizing said systems so as to be characterized by a high level of robustness, in particular in the case of tire pressure regulation systems equipped with a rotary transmission device that transmits a pressurized medium such as compressed air or a control pressure and / or working pressure to a fluid duct contained or formed in a cardan shaft.

[0019] In particular, the entire system is designed to be characterized by a low tendency to wear and an outstanding lifespan.

[0020] The device according to independent claim 1 is proposed in particular for a pressure regulation system of at least one wheel driven to rotate relative to the body of a wheeled vehicle having pneumatic tires, in which the fluid duct is housed or formed inside the cardan shaft, to ensure that the fluid duct, in particular at the articulated head of the cardan shaft, withstands wear as much as possible during operation of the vehicle.

[0021] This device transmits compressed air or pressurized medium or control pressure and / or operating pressure between a first fluid duct accommodated or formed in at least a partial area inside a cardan shaft part on the first transmission side and a second fluid duct accommodated or formed in at least a partial area inside a cardan shaft part on the second wheel side articulated to an end area of ​​the first cardan shaft part.

[0022] The compressed air / pressure transmission device is characterized in particular by comprising a pipe section that is fluidly connected (fluidically connected) to a first fluid duct and a second fluid duct or that can be fluidly connected to the first fluid duct and the second fluid duct, and whose length can be reversibly changed.

[0023] By this means it can be effectively achieved that during operation of the vehicle the fluid duct section passing through the articulating head of the cardan shaft can equalise variations in the distance between the first and second fluid ducts.

[0024] Various embodiments are conceivable for the implementation of the conduit section, which serves to fluidly connect the first fluid duct in the transmission-side cardan shaft section to the wheel-side cardan shaft section. For example, it is conceivable for the conduit section to comprise a tubular or hose-like hollow body constructed from at least two coaxially, preferably mutually concentrically, formed hollow bodies that can slide telescopically relative to one another in order to reversibly change the length of the conduit section. In this connection, in particular, it is also possible for the at least two hollow bodies to be biased into a rest position with the aid of at least one biasing element.

[0025] Alternatively, however, it is also conceivable that the conduit section has a tubular or hose-like hollow body that extends along a screw-like or helical line in at least some areas. This embodiment is distinguished by its simple yet robust construction. In addition, this embodiment can be integrated into the articulation head of the cardan shaft in a particularly space-saving manner.

[0026] Alternatively or additionally to the embodiment just described, in which the tubular or hose-shaped hollow body of the pipeline section extends in at least some regions in a spiral or helical line, it is also conceivable that the tubular or hose-shaped hollow body extends in at least some regions in a spiral line.

[0027] In particular, the tubular or hose-like hollow body of the conduit section preferably has a first end region that extends at least substantially straight. Furthermore, the tubular or hose-like hollow body has an opposite second end region that also preferably extends at least substantially straight. The tubular or hose-like hollow body is (reversibly) flexibly configured so that the second end region of the tubular or hose-like hollow body can be offset and / or manipulated in at least some regions relative to the first end region, for example by providing a region in which the tubular or hose-like hollow body extends along a helical or spiral line.

[0028] By this means, the fluid transmission device is designed to be as insensitive as possible to relative movements between the cardan shaft part on the first transmission side and the hinge shaft part on the second transmission side in the area of ​​the articulating head of the hinge shaft.

[0029] In the neutral position of the tubular or hose-shaped hollow body, i.e., when the first end region and the second end region of the tubular or hose-shaped hollow body are not offset from each other and are not biased against each other, the longitudinal axis of the first end region of the hollow body is preferably arranged concentrically with respect to the longitudinal axis of the second end region of the hollow body.

[0030] According to an embodiment of the compressed air / pressure transmission device, it is provided that the first end region of the tubular or hose-like hollow body is designed in particular to be inserted into a preferably bush-shaped or bush-like receiving portion of the first (transmission-side) cardan shaft part, which preferably bush-shaped or bush-like receiving portion is fluidly connected to the first fluid duct.

[0031] Alternatively or additionally, it is advantageously provided that the second end region of the tubular or hose-like hollow body is specifically designed to be inserted into a preferably bush-shaped or bush-like receiving portion of the second (wheel-side) cardan shaft portion, this preferably bush-shaped or bush-like receiving portion being fluidly connected to the second fluid duct.

[0032] The invention further relates to a cardan shaft arrangement for a vehicle axle, comprising a first cardan shaft part, in particular on the transmission side, having a first fluid duct accommodated or formed in at least a partial area of ​​its interior, and a second cardan shaft part, in particular on the wheel side, having a second fluid duct accommodated or formed in at least a partial area of ​​its interior, characterized in that the cardan shaft arrangement further comprises a compressed air / pressure transmission device of the aforementioned nature for transmitting compressed air or a pressurized medium or a control pressure and / or a working pressure between the first and second fluid ducts.

[0033] The cardan shaft arrangement preferably further comprises an articulation device for articulatingly connecting the first (transmission side) articulation shaft section to the second (wheel side) cardan shaft section, and the piping section of the compressed air / pressure transmission device passes through (inside) the articulation device in at least a partial area.

[0034] According to an embodiment, in order to ensure the simplest possible installation of the cardan shaft arrangement, a bush-shaped or bush-like receiving portion is preferably provided in the end region of the first (transmission-side) cardan shaft portion, in which receiving portion a first end region of the tubular or hose-like hollow body of the compressed air / pressure transmission device is received. In particular, the bush-shaped or bush-like receiving portion is preferably configured so that the first end region of the tubular or hose-like hollow body can be inserted into the receiving portion. The receiving portion is furthermore fluidly connected to a first fluid duct formed in the transmission-side cardan shaft portion.

[0035] Preferably, the receiving part comprises a self-centering part which aligns the first end region of the tubular or hose-like hollow body with the first fluid duct when said region is inserted therein.

[0036] The same applies, in turn, to the second (wheel-side) cardan shaft part, which preferably has a bush-shaped or bush-like receiving portion in one end region, which receiving portion is fluidly connected to a fluid duct formed in the second cardan shaft part, and which receiving portion is configured to connect the second end region of the tubular or hose-like hollow body of the compressed air / pressure transmission device according to the bush / plug principle, and in so doing is preferably also configured to center and / or seal it at the same time.

[0037] The invention will be explained in more detail below with reference to the accompanying drawings. [Brief explanation of the drawings]

[0038] [Figure 1] 1 is a schematic top view of an exemplary embodiment of a drive shaft (overall) of a wheel drive for a steered and driven vehicle wheel. FIG. [Figure 2a] 2 is a schematic cross-sectional view along the line AA of FIG. 1 of an exemplary embodiment of a drive shaft, in which a rotation transmission device associated with the drive shaft is provided for transmitting a pressurized medium, in particular compressed air, to the drive shaft as required. [Figure 2b] FIG. 2b is a schematic cross-sectional view taken along line BB in FIG. 2a. [Figure 3] 2b , a schematic detail of the fluid connection at the articulation head of the drive shaft formed as a cardan shaft; FIG. [Figure 4a] 2 shows a first exemplary embodiment of a compressed air / pressure transmission device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, in an articulation head of a drive shaft embodied as a cardan shaft according to FIG. 1; [Figure 4b] FIG. 4b is a schematic detail of FIG. 4a. [Figure 5a] 1 shows a further (second) exemplary embodiment of a compressed air / pressure transmission device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, in an articulation head of a drive shaft embodied as a cardan shaft according to FIG. [Figure 5b] FIG. 5b is a schematic detail view of FIG. 5a. DETAILED DESCRIPTION OF THE INVENTION

[0039] 1, 2a, 2b and 3, an exemplary embodiment of a drive shaft 50 equipped with a rotation transmission device 1 will be described first. The rotation transmission device 1 functions to transmit a pressurized medium, such as compressed air, to a fluid duct 51 contained or formed in the drive shaft 50 as required.

[0040] The drive shaft 50 shown in Figures 1, 2a and 2b is in particular a drive shaft 50 for a wheel drive for a steered and driven vehicle wheel 54.

[0041] The drive shaft 50 comprises a first transmission-side or axle-side shaft, also referred to in this disclosure as a "first transmission-side cardan shaft section 3."

[0042] Furthermore, the drive shaft 50 comprises a second gear-side shaft, also referred to in the present disclosure as the "second gear-side cardan shaft portion 5."

[0043] Between the first transmission side or axle side shaft or first transmission side cardan shaft section 3 and the second transmission side shaft or second wheel side cardan shaft section 5, an articulation device, particularly in the form of a Cardan joint 52, is configured so that the second wheel side shaft 5 can be deflected relative to the first transmission side or axle side shaft 3, respectively.

[0044] Such drive shafts 50 present certain space problems with respect to the rotary transmission device 1, since this requires that the steering axle of the wheel be as close as possible to the wheel plane so that the steering turning radius is kept as small as possible, as well as with respect to the components associated with the rotary transmission device 1, which serve to supply the vehicle wheels with pressurized medium as required. Therefore, such drive shafts 50, in particular of the steered and driven vehicle wheels 54, generally require providing a particularly compactly designed system with a rotary transmission device 1 designed to be as wear-free as possible.

[0045] The rotation transmission device 1, as shown in the drawing with a drive shaft 50, can in particular be part of a tire pressure control system for a vehicle, in particular an automobile.

[0046] The rotation transmission device 1, shown diagrammatically in Figures 2a and 2b, is mounted on a drive shaft 50 and is in particular torsionally connected to the drive shaft 50. Although not shown, the drive shaft 50 may be circumscribed by an axle housing on the vehicle side, which may form, at least in some areas, the housing of the stator assembly of the rotation transmission device 1.

[0047] As already mentioned, the free end region of the cardan shaft portion 3 on the first transmission side of the drive shaft 50 is connected to the wheel assembly 54 via the above-mentioned cardan joint 52, and thus in turn serves to mount one or more wheels on the drive shaft 50 so that they can be driven by the drive shaft 50.

[0048] As can be seen in the detailed view of Figure 3, in the drive shaft 50 shown in Figure 3, a straight and particularly rigid fluid connection 53 is provided in the area of ​​the Cardan joint 52 to fluidly connect the first fluid duct 4 housed or formed in the cardan shaft part 3 on the first transmission side to the second fluid duct 6 housed or formed in the cardan shaft part 5 on the second wheel side.

[0049] During operation of the vehicle, such a rigid fluid connection 53 is subject to certain wear, in particular due to the vibrations that occur and the relative movement between the cardan shaft part 3 on the drive side / transmission side and the hinge shaft part 5 on the wheel side.

[0050] According to the present invention, in particular to optimize the overall system in this regard, a compressed air / pressure transmission device is provided, an exemplary embodiment of which is described below with reference to Figures 4a, 4b and 5a, 5b.

[0051] In general, the embodiment of the compressed air / pressure transmission device shown diagrammatically in Figures 4 and 5 serves to transmit compressed air or pressurized medium or control pressure and / or actuation pressure, as required, between a first fluid duct 4 accommodated or formed in at least a partial area inside a first, in particular transmission-side, cardan shaft part 3 and a second fluid duct 6 accommodated or formed in at least a partial area inside a second, in particular transmission-side, cardan shaft part 5 articulated to an end area of ​​the first cardan shaft part 3.

[0052] In contrast to the embodiment shown diagrammatically in Figure 3, the embodiment of the compressed air / pressure transmission device shown diagrammatically in Figures 4 and 5 is characterized in that the line section 7 of the compressed air / pressure transmission device, which fluidly connects the first fluid duct 4 of the transmission-side cardan shaft section 3 with the second fluid duct 6 of the wheel-side cardan shaft section 5, is reversibly variable in terms of its length.

[0053] Due to this achievable flexibility, the conduit section 7 is on the one hand much easier to assemble and on the other hand less prone to wear.

[0054] As can be seen in Figures 4 and 5, particularly in the corresponding detailed views, in the embodiment provided in the drawings, the conduit section 7 is embodied in at least some areas as a tubular or hose-like hollow body 8, and the tubular or hose-like hollow body 8 of the conduit section 7 extends along a screw-like or helical line in at least some areas.

[0055] Although not shown in the drawings, it is alternatively conceivable that the tubular or hose-like hollow body 8 of the conduit section 7 extends along a spiral line at least in some areas. The conduit section 7 can also have a telescopic structure.

[0056] It should be noted that, overall, the tubular or hose-like hollow body 8 of the conduit section 7 comprises a first end region 9 which extends at least substantially linearly and an opposite second end region 10 which preferably also extends substantially linearly, and that the tubular or hose-like hollow body 8 is configured in particular such that the second end region 10 can be reversibly offset and / or deflected relative to the first end region 9.

[0057] However, as shown in Figures 4 and 5, when the tubular or hose-like hollow body 8 is in its neutral position, it is useful for the first, preferably straight, end region 9 and the second, preferably straight, end region 10 of the tubular or hose-like hollow body 8 to be arranged concentrically with respect to each other.

[0058] As can be seen in particular in the detailed views of Figures 4b and 5b, the end region of the first (transmission / drive side) cardan shaft part 3 is provided with a bush-shaped or bush-like receiving portion 11 in which the first end region 9 of the tubular or hose-shaped hollow body 8 is received and held accordingly, in particular in a self-centering manner.

[0059] It is conceivable that the first end region 9 of the tubular or hose-like hollow body 8 can be fixedly connected to a bush-shaped or bush-like receiving part 11, preferably of the first cardan shaft part 3. However, as an alternative, for example a plain bearing is also conceivable.

[0060] In particular, in order to simplify the assembly of the tubular or hose-like hollow body 8, the preferably bush-shaped or bush-like receiving part 11 of the first cardan shaft part 3 should be self-centering, since in that case only the first end region 9 of the tubular or hose-like hollow body 8 has to be inserted into the receiving part 11 and, if necessary, fixed therein.

[0061] Furthermore, the preferably bush-shaped or bush-like receiving portion 11 of the first cardan shaft portion 3 preferably has a self-sealing function to prevent fluid leakage during transmission of air pressure / pressure through the tubular or hose-like hollow body 8.

[0062] Similarly, the end region of the second (wheel-side) cardan shaft part 5 is preferably provided with such a bush-shaped or bush-like receiving portion 12, in which the second end region 10 of the tubular or hose-shaped hollow body 8 of the compressed air / pressure transmission device is preferably received. Here too, it is advantageous if the bush-shaped or bush-like receiving portion 12 is preferably designed to be self-centering and / or self-sealing.

[0063] Similar to the bush-shaped or bush-like receiving portion 11 associated with the first cardan shaft portion 3, the bush-shaped or bush-like receiving portion 12 associated with the second cardan shaft portion 5 can preferably be designed to receive the second end region 10 of the tubular or hose-like hollow body 8, such that the second end region 10 is fixed relative to the receiving portion 12 or the second cardan shaft portion 5 or is rotatably supported relative to it around the longitudinal axis of the second cardan shaft portion 5.

[0064] For example, drive shaft 50, embodied as a hollow or partially hollow shaft, may have any number of channel guides or fluid ducts.

[0065] Any fluid duct of the drive shaft 50, which runs parallel to its axis of rotation, can have any number of branch ducts on the drive shaft surface, and all branch ducts located in the area of ​​the stator assembly are "subject" to the same control pressure. The outer contour (topology) of the drive shaft 50 is formed so that the drive shaft 50 has a sealing portion against the axis of rotation in the transmission area. The sealing portion is a portion defined by two seals, in particular sealing lips, or by a rotationally symmetrical mass of material on the longitudinal axis of the drive shaft 50.

[0066] The present invention is not limited to the illustrated embodiments, but arises from a consideration of all the features disclosed in this disclosure taken together. [Configuration 1] 1. A device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, between a first fluid duct (4) accommodated or formed in at least a partial area of ​​the interior of a first cardan shaft part (3), in particular the first cardan shaft part (3) on the transmission side, and a second fluid duct (6) accommodated or formed in at least a partial area of ​​the interior of a second cardan shaft part (5), in particular the second cardan shaft part (5) on the wheel side, articulated to an end area of ​​the first cardan shaft part (3), the device comprising a duct section (7) fluidly connected or fluidly connectable to the first fluid duct (4) and the second fluid duct (6), the length of which can be reversibly changed. [Configuration 2] The pipeline portion (7) has a tubular or hose-like hollow body (8) extending along a screw-like or helical line in at least a portion of the region. 10. The apparatus of claim 1. [Configuration 3] The pipeline portion (7) has a tubular or hose-like hollow body (8) extending along a spiral line in at least a part of its area. 3. The device according to configuration 1 or 2. [Configuration 4] the conduit section (7) comprises a tubular or hose-like hollow body (8) with a first end region (9), preferably extending at least substantially linearly, and an opposite second end region (10), preferably extending at least substantially linearly, the tubular or hose-like hollow body (8) being designed such that the second end region (10) can be reversibly offset and / or biased relative to the first end region (9); 4. The apparatus of any one of configurations 1 to 3. [Configuration 5] the tubular or hose-like hollow body (8) is designed so that the longitudinal axis of the first end region (9) is arranged concentrically with the longitudinal axis of the second end region (10) when the first end region (9) and the second end region (10) are not offset or biased relative to each other; 5. The apparatus of claim 4. [Configuration 6] the first end region (9) of the tubular or hose-like hollow body (8) is designed to be received, in particular to be inserted, in a preferably bush-shaped or bush-like receiving part (11) of the first cardan shaft part (3), the receiving part (11) being fluidly connected to the first fluid duct (4); and / or the second end region (10) of the tubular or hose-like hollow body (8) is designed to be received, in particular to be inserted, into a preferably bush-shaped or bush-like receiving part (12) of the second cardan shaft part (5), the receiving part (12) being fluidly connected to the second fluid duct (6); 6. The apparatus of any one of configurations 2 to 5. [Configuration 7] A cardan shaft device for a vehicle axle, comprising: a first cardan shaft part (3), in particular on the transmission side, having a first fluid duct (4) accommodated or formed in at least a partial area of ​​its interior; a second cardan shaft part (5) on the wheel side, the second cardan shaft part (5) having a second fluid duct (6) housed or formed in at least a partial area of ​​its interior; a device according to any one of the preceding claims 1 to 6 for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, between the first fluid duct (4) and the second fluid duct (6); A cardan shaft device having [Configuration 8] the cardan shaft arrangement further comprises a coupling device, in particular in the form of a cardan joint (52), via which the first cardan shaft section (3) is articulated to the second cardan shaft section (5), and the line section (7) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, runs through the coupling device at least in a partial area; 8. The cardan shaft device of claim 7. [Configuration 9] a preferably bush-shaped or bush-like receiving portion (11) is provided in the end region of the first cardan shaft portion (3), in which the first end region (9) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, is received; 9. The cardan shaft device according to claim 7 or 8. [Configuration 10] the preferably bush-shaped or bush-like receiving part (11) is designed to receive, in particular in a self-centering manner, the first end region (9) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, and / or the preferably bush-shaped or bush-like receiving part (11) is designed to receive, in particular in a self-sealing manner, the first end region (9) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, 10. The cardan shaft device of claim 9. [Configuration 11] the preferably bush-shaped or bush-like receiving part (11) is designed to receive the first end region (9) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, fixedly or allowing a rotational movement relative to the end region of the first cardan shaft part (3), 11. The cardan shaft device according to claim 9 or 10. [Configuration 12] a preferably bush-shaped or bush-like receiving portion (12) is provided in the end region of the second cardan shaft portion (5), in which the second end region (10) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, is received; 12. The cardan shaft arrangement of any one of configurations 7 to 11. [Configuration 13] the preferably bush-shaped or bush-like receiving part (12) is designed to receive, in particular in a self-centering manner, the second end region (10) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure; and / or the preferably bush-shaped or bush-like receiving part (12) is designed to receive, in particular in a self-sealing manner, the second end region (10) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure; 13. The cardan shaft device of claim 12. [Configuration 14] the preferably bush-shaped or bush-like receiving part (12) is designed to receive the second end region (10) of the tubular or hose-like hollow body (8) of the device for transmitting a pressurized medium, in particular compressed air or a control pressure and / or a working pressure, fixedly or allowing a rotational movement relative to the end region of the second cardan shaft part (5), 14. The cardan shaft device according to claim 12 or 13. [Configuration 15] 15. A tire pressure regulation system for at least one wheel of a wheeled vehicle having a pneumatic tire, the at least one wheel being driven to rotate relative to a vehicle body, the tire pressure regulation system comprising at least one cardan shaft arrangement according to any one of configurations 7 to 14 for driving the wheel.

Claims

1. A device for transmitting compressed air or control pressure and / or operating pressure between a first fluid duct (4) accommodated or formed in at least a partial area inside a first cardan shaft part (3) on the transmission side and a second fluid duct (6) accommodated or formed in at least a partial area inside a second cardan shaft part (5) on the wheel side, which is articulated to an end area of ​​the first cardan shaft part (3), the device having a conduit part (7) fluidly connected or fluidly connectable to the first fluid duct (4) and the second fluid duct (6), the length of the conduit part (7) being reversibly changeable, the conduit part (7) having a tubular or hose-like hollow body (8) extending along a screw-like or helical line in at least a partial area and having a plurality of turns, wherein adjacent turns of the hollow body (8) are in contact with each other when the hollow body (8) is in a neutral position.

2. The hollow body (8) extends along a spiral line in at least some areas.

10. The apparatus of claim 1.

3. the hollow body (8) comprises a first end region (9) and an opposite second end region (10), the hollow body (8) being designed such that the second end region (10) can be arranged reversibly offset and / or biased relative to the first end region (9); 3. The device according to claim 1 or 2.

4. the hollow body (8) is designed such that the longitudinal axis of the first end region (9) is arranged concentrically with respect to the longitudinal axis of the second end region (10) when the first end region (9) and the second end region (10) are not offset or biased relative to each other; 4. The apparatus of claim 3.

5. the first end region (9) of the hollow body (8) is designed to be received and inserted into a receiving portion (11) of the first cardan shaft portion (3), the receiving portion (11) being fluidly connected to the first fluid duct (4); and / or the second end region (10) of the hollow body (8) is designed to be received and inserted into a receiving portion (12) of the second cardan shaft portion (5), the receiving portion (12) being fluidly connected to the second fluid duct (6); 5. The device according to claim 3 or 4.

6. A cardan shaft device for a vehicle axle, comprising: a first cardan shaft part (3) on the transmission side, the first cardan shaft part (3) having a first fluid duct (4) housed or formed in at least a partial area of ​​its interior; a second cardan shaft portion (5) on the wheel side, the second cardan shaft portion (5) having a second fluid duct (6) housed or formed in at least a partial area of ​​its interior; A device according to any one of claims 1 to 5 for transmitting compressed air or a control and / or working pressure between the first fluid duct (4) and the second fluid duct (6), A cardan shaft device having

7. the cardan shaft arrangement further comprises a coupling device in the form of a cardan joint (52), via which the first cardan shaft section (3) is articulated to the second cardan shaft section (5), and the conduit section (7) extends through the coupling device at least in a partial area; 7. The cardan shaft arrangement according to claim 6.

8. a receiving portion (11) is provided in an end region of the first cardan shaft portion (3), and a first end region (9) of the hollow body (8) is received in the receiving portion (11) of the first cardan shaft portion (3); 8. A cardan shaft arrangement according to claim 6 or 7.

9. the receiving portion (11) of the first cardan shaft portion (3) is designed to receive the first end region (9) of the hollow body (8) in a self-centering manner, and / or the receiving portion (11) of the first cardan shaft portion (3) is designed to receive the first end region (9) of the hollow body (8) in a self-sealing manner; 9. A cardan shaft arrangement according to claim 8.

10. the receiving portion (11) of the first cardan shaft portion (3) is designed to receive the first end region (9) of the hollow body (8) either fixedly or in a manner allowing rotational movement relative to the end region of the first cardan shaft portion (3); 10. A cardan shaft arrangement according to claim 8 or 9.

11. a receiving portion (12) is provided in an end region of the second cardan shaft portion (5), and a second end region (10) of the hollow body (8) is received in the receiving portion (12) of the second cardan shaft portion (5); A cardan shaft arrangement according to any one of claims 8 to 10.

12. the receiving portion (12) of the second cardan shaft portion (5) is designed to receive the second end region (10) of the hollow body (8) in a self-centering manner, and / or the receiving portion (12) of the second cardan shaft portion (5) is designed to receive the second end region (10) of the hollow body (8) in a self-sealing manner; 12. A cardan shaft arrangement according to claim 11.

13. the receiving portion (12) of the second cardan shaft portion (5) is designed to receive the second end region (10) of the hollow body (8) either fixedly or allowing a rotational movement relative to the end region of the second cardan shaft portion (5); 13. A cardan shaft arrangement according to claim 11 or 12.

14. 14. A tire pressure regulation system for at least one wheel of a wheeled vehicle with pneumatic tires, said at least one wheel being driven to rotate relative to the vehicle body, said tire pressure regulation system comprising at least one cardan shaft arrangement according to any one of claims 6 to 13 for driving said wheel.

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