Rotary feedthrough for hydraulic system

Abstract

The invention relates to a rotary feed-through (100) for a hydraulic steering and / or hydraulic brake system in a vehicle (200), comprising: a stationary part (10) having: o a first outlet (11) for a first fluid; a rotatable part (20) having: o a first duct (21) provided for conducting a first fluid, the first duct (21) being connectable to the first outlet (11) via a first chamber (31); wherein the rotatable part (20) is rotatably mounted relative to the fixed part (10) about an axis of rotation (V) in such a way that o, between the fixed part (10) and the rotatable part (20), a first chamber (31) is formed, which is provided for providing a continuous fluid connection for a first fluid between the first duct (21) and the first outlet (11); and / or o the rotary feed-through part (100) makes the feed-through of the second fluid possible in at least the first operating position (I) and the second operating position (II) and locks it in at least one locking position. The invention further relates to a vehicle (200) having a rotary feed-through (100).

Description

TECHNICAL FIELD

[0001] The present invention relates to a swivel passage and to a vehicle. BACKGROUND

[0002] Vehicles with a swivelable member, which the driver can change its orientation on for example for a better view, are known. It can be advantageous here that a hydraulic system, for example a brake system and / or a steering system, can be swung accordingly with the driver and / or the swivelable member, in particular perpendicular to a vertical line or swivel axis. Accordingly, the driver can orient himself for example in the driving direction, while after a swing or swivel he is oriented against the driving direction. Thereby, the driver can operate the vehicle as usual, for example in the case of a corresponding forward driving, independently of his orientation.

[0003] The prior art has disadvantages here. It is possible for example that the steering direction changes (in the case of a swing), which can make the operation difficult for the driver. For example, a steering to the left in the (normal) driving direction can cause a deflection of the vehicle wheels for a left turn. After a 180° swivel, in particular in the case of a backward movement, which then corresponds to "forward" for the driver, a steering to the left however results in a right turn. It is furthermore disadvantageous that different hydraulic systems, for example a steering system and a brake system, are separated and / or guided via (hose) lines. These lines can be twisted and / or wound. These lines can also be damaged, for example in the case of a pinch. This can reduce the safety, in particular due to a fluid outflow (the fluid for this can have a pressure of for example between 40 and 200 bar). Furthermore, this can reduce the robustness and / or increase the costs. Furthermore, the trustworthiness of such a device can be low and / or the appearance can be disadvantageous. Valves, which can be used for the switching, require a special actuation and / or handling. SUMMARY

[0004] It is therefore an object of the present invention to at least partially overcome at least one of the above-mentioned disadvantages. In particular, it is an object of the present invention to provide a simpler, more compact, more practical, more safe, more robust and / or more cost- appropriate solution.

[0005] The above-mentioned objects are achieved by a swivel passage according to the present invention and by a vehicle according to the present invention. Further features and details of the present invention result from the present specification and the drawings. Herein, the features and details described in connection with the swivel passage according to the present invention are obviously equally applicable in connection with the vehicle according to the present invention and vice versa, so that with respect to the disclosure of the respective inventive aspects always reference can be made to each other. In particular, the advantages described in the case of the first and / or second aspect (and if necessary further aspects) are equally applicable to the first and / or second aspect (and if necessary further aspects) accordingly.

[0006] According to a first aspect, the above mentioned object is achieved by a rotary passage for a hydraulic steering system and / or a hydraulic brake system in a vehicle, having

[0007] - a stationary part having

[0008] o a first outlet for a first fluid,

[0009] - a rotatable part having

[0010] o a first duct arranged for guiding the first fluid, wherein the first duct is connectable (or connected) via a first chamber with the first outlet,

[0011] - wherein the rotatable part is rotatably supported relative to the stationary part about a rotary axis, such that

[0012] o the first chamber is configured between (and / or by) the stationary part and the rotatable part, arranged for providing a persistent fluid connection for the first fluid between the first duct and the first outlet, and / or

[0013] o the rotary passage enables a passage of a second fluid and locks it in at least one (intermediate) locked position.

[0014] The rotary feedthrough can be used in a hydraulic steering system and / or a hydraulic brake system in a vehicle. Preferably, the rotary feedthrough can be used with and / or with a hydraulic brake system and (at the same time) with a hydraulic steering system. It can be preferred here to provide that the hydraulic steering system and / or the hydraulic brake system (respectively) is operated by at least one fluid, for example a force-transmitting fluid. It can be provided that the hydraulic steering system and / or the hydraulic brake system use the same fluid, however, which is distinguished by its respective pressure (in the respective system). For example, a first fluid (preferably in the hydraulic brake system) can have a first pressure, for example a pressure of approximately 40 bar. For example, a second fluid (preferably in the hydraulic steering system) can have a second pressure, wherein, in particular, the second pressure is greater than the first pressure of the first fluid. For example, the second pressure can have approximately 200 bar. It can be particularly preferred if no fluid connection (without contact via the fluid) and / or pressure exchange takes place between the first fluid and the second fluid. It can be preferred, in turn, if no fluid exchange and / or pressure equalization is achieved between the hydraulic steering system and the hydraulic brake system. Thus, the (high) second pressure of the second fluid cannot negatively influence the first pressure of the first fluid. Thereby, in particular, too high a pressure in the hydraulic brake system can be prevented. This (otherwise) can lead to a full brake, for example when the hydraulic steering system has 200 bar and the hydraulic brake system 40 bar (or the respective fluid). It can be preferred, in addition, to provide that the operation of the (hydraulic) brake system is possible at all times or continuously. This can increase safety. It can be provided here that the (hydraulic) steering system is (substantially) only possible in the first operating position and in the second operating position. It can be particularly preferred if the effect is reversed between the first operating position and the second operating position. In other words, the above-mentioned disadvantage (i.e. the same steering in different operating positions respectively promotes a different and / or unexpected steering direction or driving direction) can be improved. This can be possible here alone and / or only due to the switching between the first operating position and the second operating position, in particular due to the geometric design of the feedthrough of the second fluid (see below).

[0015] Here, the (first, second, third, fourth and / or fifth) fluid can have a liquid and / or gaseous medium, which can preferably be provided for a relatively high pressure. For example, the fluid can have oil. It can be provided here that the fluid is under pressure, i.e. has a pressure of, for example, more than 2 bar, for example 40 bar and / or 200 bar. It can be provided that the rotary feedthrough essentially feeds the fluid or the fluids, for example through a respective pipe (see also below). At the same time and / or alone, the rotary feedthrough can perform the switching between the first operating position and the second operating position. Thereby, the rotary feedthrough can function as, like and / or with reference to a directional valve, in particular a 4 / 2 directional valve.

[0016] The fixed part can preferably be connected (fixedly and / or torsionally) with the vehicle. For example, the fixed part and / or the rotatable part can be arranged along a rotation axis, which is oriented in particular along a vertical line and / or arranged perpendicularly (and / or centrally) to the vehicle. Here, the fixed part can preferably be designed as a receptacle, wherein the rotatable part can be brought into the fixed part (from above), for example in the case of assembly and / or maintenance. Here, the fixed part can be the upper part and / or the rotatable part is the lower part. The rotatable part can be rotated and / or swung relative to the fixed part about the rotation axis, which can be oriented parallel to or along a vertical line. A rotation of 360° can be provided here. Preferably, an arrangement can be made such that a (stepless) rotation of (approximately) 0 to 180° is possible. At least one latching means is preferably provided, which (reversibly releasably) locks the rotatable part relative to the fixed part in the first operating position and / or in the second operating position.

[0017] The conduits (first, second conduit, etc.) can preferably be produced by (cylindrical) drillings. These drillings can have a circular cross section. Advantageous flow properties and / or high pressure resistance can thereby be achieved. Preferably, these conduits are designed (approximately) straight. Thereby, a simple and / or more cost- appropriate production can be made possible.

[0018] The first conduit is provided for guiding a first fluid. The first conduit is connectable (or connected) with the first outlet via the first chamber. The first conduit is preferably connectable / connected with the (right) brake pedal, which is in particular provided for being manipulated by the driver in order to operate or manipulate at least one brake on the right side of the vehicle. This can be implemented accordingly by a force transmission by the first fluid. The first conduit is preferably arranged parallel to the rotation axis. Thereby, the first conduit can guide the first fluid in particular from above to below (unless stated otherwise, starting from the assembled state). Preferably, the first conduit can be arranged (in the driving direction) to the right of the rotation axis. Here, the driving direction can be configured perpendicular to the rotation axis (and / or vertical line) and in particular the forwardly directed driving direction of the vehicle. A rearward direction can be provided opposite to the driving direction, which is opposite (for example 180°) to the driving direction. A transverse direction can be provided (for illustration), which is configured perpendicular to the driving direction and / or the rotation axis.

[0019] The first outlet can be provided for outputting the first fluid, in particular for conducting it to the first and / or right-hand brake (see above). The first outlet can be arranged perpendicular to the rotational axis. Preferably, the first outlet and the second outlet are designed at right angles or acute angles to one another, in particular symmetrically with respect to a plane spanned by the direction of travel and the rotational axis. Thereby, a particularly good accessibility and / or distinguishability of the different interfaces can be achieved. The first outlet can be arranged (directly) below and / or beside the second outlet (with respect to the rotational axis). Correspondingly, the first chamber can be arranged (directly) below and / or beside the second chamber.

[0020] The rotatable part is preferably (so) rotatably supported relative to the stationary part about the axis of rotation, such that a first chamber is configured between (and / or by) the stationary part and the rotatable part, which is provided for providing a persistent (in particular temporally persistent and / or predominantly prevailing) fluid connection for the first fluid between the first conduit and the first outlet. Thereby, the (first) fluid can flow through, in particular persistently flow through, the first conduit (or the part connected thereto). This can improve safety. Here, too, a first chamber can preferably be configured. Here, the first chamber can connect the first conduit and the first outlet. Here, the first chamber can be configured between the mutually facing surfaces of the stationary part and the rotatable part. Here, the first chamber can be configured by the (geometric) design of the mutually facing surfaces of the stationary part and the rotatable part. Thereby, the chamber can be configured without additional components and / or based on the geometry alone. For example, the stationary part and / or the rotatable part has (encircling) grooves, in particular at the same height (along the axis of rotation and / or in the assembled state), which preferably have a rectangular, square and / or trapezoidal cross section. The first chamber can be designed point-symmetrically, axially symmetrically (about the axis of rotation), annularly as an annular chamber and / or as a cylindrical surface. This can allow simple and / or cost- appropriate manufacture. This can also make high stability possible. It can be provided that the first chamber and the second chamber are identically designed, wherein these chambers in particular have the same cross section (in the circumferential direction), preferably with different diameters (about the axis of rotation). It can be particularly preferred if the stationary part and / or the rotatable part is (at least section-wise) designed terraced and / or stepped (about the axis of rotation). In other words, it can be provided that the different chambers, in particular the first chamber and the second chamber, have different (internal and / or external) diameters. This can advantageously make particularly simple manufacture and / or assembly possible. Furthermore, it can prevent unwanted damage to, in particular, a seal in the event of assembly, for example in the event of introducing the rotatable part into the stationary part. Here, in particular the (different) chambers can be designed terraced and / or stepped. Here, in particular the first chamber and the second chamber can be designed terraced and / or stepped, wherein the second (upper) chamber has a larger diameter. It can be provided that the first chamber is arranged below the second chamber and / or is twisted relative to one another (about the axis of rotation). Preferably, the first chamber can be sealed by at least one seal, preferably two seals, in particular relative to the adjacent chamber, for example relative to the second (upper) chamber and / or the (lower) leakage chamber. The seal(s) can be designed annularly and / or arranged symmetrically about the axis of rotation. The seal(s) can have an elastic and / or pressure-resistant material, for example an elastomer. The seal can be designed as an O-ring, an x-ring and / or a cylindrical surface.

[0021] The inlet and / or outlet of the rotatable part and / or the stationary part can for example have (reversibly uncouplable) screw connections and / or bayonet connections (in particular at the outer end). Thereby simple and / or quick assembly and / or maintenance can be made possible. Preferably, these are designed self-lockingly.

[0022] The first inlet can be arranged in the rotatable part. The first inlet can preferably be connected with a first duct and in particular be designed branched at right angles from this duct. Preferably, the first duct is connectable and / or connected via the first inlet with the first (right-hand) brake pedal. It can be provided accordingly that, in the assembled state and / or in the case of all connections being present, the first (right-hand) brake pedal is transmittable via the driver's (and of the first fluid) manipulation via the first inlet, the first duct, the first chamber and / or the first outlet to the first (right-hand) brake, whereby this brake can be advantageously manipulated, preferably independently of the relative position or the rotation (also continuously) of the rotatable part relative to the stationary part. This can increase the safety. Here, the first fluid can be (everywhere) within the aforementioned components and / or can transmit the (continuous) fluid connection from the brake pedal to the brake, in particular by the application of pressure and / or movement by the brake pedal. Preferably, the first inlet and the second inlet are designed at right angles or acute angles to one another, in particular symmetrical relative to a plane spanned by the direction of travel and the axis of rotation. Thereby a particularly good accessibility and / or distinguishability of the different interfaces can be derived. The first inlet can preferably be arranged (with respect to the axis of rotation) at the same height as the second inlet.

[0023] Alternatively or, preferably, additionally, the rotatable part can be (thus) rotatably supported relative to the stationary part about the rotation axis, such that the rotation passage enables the passage of the second fluid in at least the first operating position and the second operating position and is blocked in at least one (intermediate) blocking position. In other words, the rotatable part can be (rotatably) supported relative to the stationary part (e.g. internally) such that a (low-friction) rotation about the rotation axis is possible. Thereby, a torsion and / or a wobble about the rotation axis can be achieved, in particular between the first operating position (as a first end point) and the second operating position (as a second end point). Herein, in the first operating position and / or the second operating position (respectively) a driving and / or a further function of the vehicle can be enabled (and, preferably, not in other cases). It is particularly preferred that (only) in the first operating position and / or the second operating position (respectively) a steering of the vehicle is enabled, wherein between them a switching and / or blocking position is provided. This can preferably be achieved on the basis of a geometrical design of the rotatable part. In particular, this can be achieved on the basis of an arrangement and / or an orientation of the rotatable part, in particular of the first and second steering shafts (see below). It can be provided that in the blocking position the second fluid cannot flow through the rotatable part and / or the stationary part.

[0024] The second fluid can preferably have a higher pressure than the first fluid, e.g. 200 bar. The second fluid can preferably be provided for actuation and / or force transmission, in particular for a hydraulic steering system.

[0025] By the rotatability and / or the rotation about the rotation axis a respective particular advantage can in particular be that not only a permanent fluid connection through the first chamber (for the first fluid) is possible, but additionally a change between the first and the second operating position is possible. Thereby, an improved rotation passage can be provided. In other words, two different and / or separate hydraulic systems, in particular a hydraulic brake system and a hydraulic steering system, can be guided and / or used uniformly, simultaneously and / or compactly through the rotation passage. In particular, thereby (separate and / or separate) cables and / or hoses for different (fluid) connections and / or fluids (e.g. first and second fluid) can be cancelled. Thereby, a safety can be increased and / or costs can be reduced.

[0026] It can be advantageous in the case of the present application that the first operating position and the second operating position are oppositely directed to each other, in particular are approximately twisted by 180° with respect to the (in particular vertically directed) rotation axis.

[0027] Here, it is preferred that the first operating position can be directed in the direction of travel (of the vehicle), while the second operating position can be directed counter to the direction of travel. Thus, for example, in the second operating position (assuming that the driver turns, for example, along with the driver's seat) the rearward travel of the vehicle is designed like forward travel for the driver. By shifting between the first operating position and the second operating position, therefore, an advantageous swinging and / or twisting can be facilitated, in particular both along the direction of travel and against the direction of travel (in the direction of travel in reverse).

[0028] In the case of the application, it can be considered that the first operating position makes possible a passage of the at least one further fluid in a first angular range, which is between 0 and 45°, in particular between 0 and 35°, preferably between 0 and 25°, and / or the second operating position makes possible a passage of the at least one further fluid in a second angular range, which is between 180° and 135°, in particular between 180° and 145°, preferably between 180° and 155°.

[0029] Here, it can be provided that the first and / or second angular range results depending on the geometrical design of the rotatable part. For example, the first and / or second steering spindle can have a first and / or second diameter, for example based on the design as a through-hole and / or blind hole. The first and second steering spindles can have the same diameter. Thereby, in the first and second operating position a similar or identical, preferably flush and / or aligned, coupling can be achieved accordingly. In the case of a movement from the first operating position to the second operating position (or vice versa), here it can be provided that the respective fluid connection is continuously reduced until it is finally completely disconnected and / or a locking position (or locking angle) is reached, in which in particular no fluid connection exists. Accordingly, in the first and / or second angular range the first and / or second operating position can exist accordingly. Here, it can be provided that the first and / or second operating position (in fact) only exists at 0 and / or 180°, for example by means of an (additional) valve system and / or a latching means. For example, the valve system can be arranged at the first and / or second steering outlet and / or at the first and / or second inlet. Thereby, the valve system can advantageously be locked when not occupying the position of 0 or 180°.

[0030] In the case of the application, it can be provided that the fixed part has a second outlet (for a third fluid), (wherein preferably the first fluid and the third fluid have approximately the same pressure), wherein the rotatable part has a second duct (which is provided for guiding the third fluid), wherein the second duct is connected to the second outlet via a second chamber, wherein in particular the second chamber is configured between the fixed part and the rotatable part and is provided for providing a continuous fluid connection (for the third fluid) between the second duct and the second outlet.

[0031] A second duct can be provided for guiding a third fluid. Here, the third fluid can be identical to the first fluid. The third fluid can have a third pressure, which can be distinguished from the first pressure, in particular (at least at times). For example, in order to be able to actuate the first and second brakes separately from one another. Alternatively, it can be provided that the first fluid and the third fluid have the same pressure, for example when the first and second brake pedals are coupled, for example by a coupling pin. The second duct can be connected (or connected) to the second outlet via the second chamber. The second duct can be connected / connected to the (left) brake pedal, in particular provided for actuation by the driver, in order to actuate or operate at least one brake on the left side of the vehicle. This can be achieved accordingly by force transmission by the third fluid. The second duct is preferably arranged parallel to the rotation axis. Thereby, the second duct can guide the third fluid, in particular from above downwards (unless otherwise stated, from the fitted state). Preferably, the second duct is arranged (in the direction of travel) to the left of the rotation axis. Preferably, the first duct and the second duct are arranged symmetrically and / or equidistantly with respect to the rotation axis, for example at a distance of between 5 mm and 20 mm.

[0032] The second outlet can be provided for outputting the third fluid, in particular for guiding it to the second and / or left brake (see above). The second outlet can be arranged perpendicular to the rotation axis. Preferably, the first outlet and the second outlet are designed at right angles or acute angles to one another, in particular symmetrically to the plane spanned by the direction of travel and the rotation axis. Thereby, a particularly good accessibility and / or distinguishability of the different interfaces can be achieved. The first outlet can be arranged (directly) below and / or next to the second outlet (with respect to the rotation axis). Accordingly, the first chamber can be arranged (directly) below and / or next to the second chamber.

[0033] The rotatable part is preferably rotatably supported relative to the stationary part about the axis of rotation, so that a second chamber is configured between (and / or by) the stationary part and the rotatable part, which second chamber is provided for providing a permanent (in particular temporally persistent and / or predominantly prevailing) fluid connection (for the third fluid) between the second conduit and the second outlet. Thereby, the (third) fluid can flow through, in particular permanently through, the second conduit (or the portion connected thereto). This can improve safety. Here, the second chamber can also be configured when no rotational movement occurs. Here, the second chamber can connect the second conduit and the second outlet. Here, the second chamber can be configured between the mutually directed surfaces of the stationary part and the rotatable part. Here, the second chamber can be configured by the (geometric) design of the mutually directed surfaces of the stationary part and the rotatable part. Thereby, the chamber can be configured without additional components and / or based on the geometry alone. For example, the stationary part and / or the rotatable part can have a (surrounding) groove, in particular at the same height (along the axis of rotation and / or in the installed state), which preferably has a rectangular, square and / or trapezoidal cross section. The second chamber can be designed point-symmetrically, axially symmetrically (with respect to the axis of rotation), as an annular chamber, annularly and / or as a cylindrical surface. This can allow simple and / or cost- appropriate manufacture. This can also make high stability possible. It can be provided that the second chamber is arranged above the first chamber and / or that it is twisted relative to one another (with respect to the axis of rotation). Preferably, the second chamber can be sealed by at least one seal, preferably two seals, in particular relative to the adjacent chamber, for example relative to the first (underlying) chamber and / or the (overlying) return chamber. The seal(s) can be configured annularly and / or arranged symmetrically about the axis of rotation. The seal(s) can have an elastic and / or pressure-resistant material, for example an elastomer. The seal can be designed as an O-ring, an x-ring and / or a cylindrical surface.

[0034] The second inlet can be arranged in the rotatable part. The second inlet can preferably be connected with a second duct, and can in particular be designed branched at a right angle from this duct. Preferably, the second duct is connectable and / or connected via the second inlet with the second (left) brake pedal. It can be provided accordingly that, in the assembled state and / or in the case of all connections being present, a manipulation of the second (right) brake pedal by the driver (and by the third fluid) can be transmitted via the second inlet, the second duct, the second chamber and / or the second outlet to the second (left) brake, whereby this brake can advantageously be manipulated, preferably independently of the relative position or the rotation (also continuously) of the rotatable part relative to the fixed part. This can improve the safety. Here, the third fluid can be (everywhere) present in the aforementioned components, and / or can transmit a (continuous) fluid connection from the brake pedal up to the brake, in particular by the application of pressure and / or movement via the brake pedal. Preferably, the first inlet and the second inlet are designed at a right angle or an acute angle to one another, in particular symmetrically to a plane spanned by the driving direction and the axis of rotation. Thereby a particularly good accessibility and / or distinguishability of the different interfaces can be achieved. The first inlet can preferably be arranged at the same height (relative to the axis of rotation) as the second inlet.

[0035] Furthermore, it can be considered that the rotatable part has

[0036] - a pressure duct (for guiding the fourth fluid), in particular with a pressure outlet connected with the pressure duct,

[0037] wherein the fixed part has

[0038] - a pressure inlet (for introducing the fourth fluid), wherein the pressure duct is connected with the pressure inlet via a pressure chamber, wherein the pressure chamber is provided for providing a continuous fluid connection (for the fourth fluid) between the pressure duct and the pressure inlet.

[0039] The fourth fluid can be identical to the second fluid, in particular both can be provided for operating (the same) hydraulic steering system, preferably in the case of approximately 200 bar. It can be provided that the (fourth or second) pressure of the fourth fluid and the second fluid is identical (for example, respectively 200 bar). Alternatively, it can be provided that (at least sometimes) a pressure difference between the second and the fourth fluid exists. In other words, the fourth fluid can provide a (basic) fourth pressure for operating the steering system. Here, the steering itself can be achieved by the application of the second pressure and / or movement by the driver, preferably via a hydraulic booster (or hydraulic steering, Orbitrol).

[0040] A pressure duct can be provided for guiding the fourth fluid. The pressure duct can be connected (or be connected) with the pressure outlet via the pressure chamber. The pressure duct can be connectable / connected with the inlet of the (steering) hydraulic booster of (each one of the) steering system and / or the pressure pump. Here, the pressure pump provides (the fourth) pressure at the hydraulic booster, preferably constantly and / or independent of the operating position, in particular via the fourth fluid and / or the rotation lead-through. Via the hydraulic booster, the driver can control and / or steer the vehicle, for example by manipulating a steering wheel which is coupled with the hydraulic booster. Here, the pressure pump can load the fourth fluid, for example with a fourth pressure of 200 bar. This can be achieved accordingly by force transmission by the fourth fluid. The pressure duct is preferably arranged parallel, along and / or aligned to the rotation axis. Thereby, the pressure duct can guide the fourth fluid, in particular from below upwards (unless stated otherwise, starting from the assembled state). Preferably, the pressure duct can be configured in the middle and / or center (in the driving direction) within the rotatable part, in particular the lower part of the rotatable part. Here, the pressure duct can be configured (almost) along the entire height of the rotatable part, for example at least over 90% of the height.

[0041] The pressure outlet can be provided for outputting the fourth fluid, in particular for guiding it to the inlet of the hydraulic booster (see above). The pressure outlet and / or the pressure inlet can be designed angularly, in particular at right angles, relative to the pressure duct. The pressure outlet and / or the pressure inlet can be designed pointing in the forward direction and / or the rearward direction. Preferably, the pressure outlet and the return inlet are designed pointing in parallel and / or in the same direction to each other. Thereby, a particularly good accessibility and / or easy coupling / disconnection of the hydraulic booster can be achieved. The pressure outlet can be arranged (directly) above and / or next to the return inlet and / or the first / second outlet (relative to the rotation axis).

[0042] The rotatable part is preferably rotatably supported and / or arranged relative to the stationary part about the axis of rotation such that a pressure chamber is configured between and / or by the stationary part and the rotatable part, which pressure chamber is provided for providing a (for the fourth fluid) permanent (in particular temporally permanent and / or predominantly permanent) fluid connection between the pressure line and the pressure inlet. Thereby, the (fourth) fluid can flow through, in particular permanently flow through, the pressure line (or a part connected therewith). This can increase safety and / or provide a (permanent) pressure loading (of in particular a hydraulic booster). Here, the pressure chamber can also be configured when no rotational movement occurs. Here, the pressure chamber can connect the pressure line and the pressure inlet. Here, the pressure chamber can be configured between the surfaces of the stationary part and the rotatable part pointing towards each other. Here, the pressure chamber can be configured by the (geometric) design of the surfaces of the stationary part and the rotatable part pointing towards each other. Thereby, the chamber can be configured without further components and / or based on the geometry alone. For example, the stationary part and / or the rotatable part can be configured as a pressure chamber, in particular at the lower end (in the direction of rotation or the axis of rotation) of the rotatable part. Thereby, the pressure chamber can be designed relatively compactly. Advantageously, the pressure chamber can thereby be arranged at the lowermost and / or smallest (or most compact) section between the rotatable part and the stationary part. Thereby, a leakage and / or a fluid exchange with the first fluid (i.e. for example a brake system) can be optimally prevented. Here, the rotatable part can preferably have a minimum size and / or a minimum diameter in the lower region. Here, the rotatable part can be designed rotationally symmetrical at least section-wise, preferably in the lower region. Thereby, stability and / or pressure resistance can be increased. Preferably, the length of the rotatable part (in the assembled state) is here not sufficient to contact the stationary part in the lowermost section. A (preferably cylindrical) pressure chamber can be configured by the spacing at this location. Thereby, a robust and / or low-wear (fluid) connection between the rotatable part and the stationary part can be advantageously established, which connection can be designed in particular without valves and / or without hinges and / or without a direct mechanical connection. The pressure chamber can be designed point-symmetrically, axially symmetrically (relative to the axis of rotation), as a cylindrical chamber and / or barrel-shaped. This can allow a simple and / or cost- appropriate manufacture. This can also make a high stability possible. Preferably, the pressure chamber can be sealed by at least one seal, preferably two seals, in particular relative to an adjacent chamber, for example a leakage chamber (above) and / or a first chamber (also above). The seal(s) can be designed annularly and / or arranged symmetrically around the axis of rotation. The seal(s) can have an elastic and / or pressure-resistant material, for example an elastomer. The seal(s) can be designed as O-rings, x-rings and / or cylindrical surfaces.

[0043] The pressure inlet can be arranged in the stationary part. The pressure inlet can preferably be connected with a pressure line, for example via a pressure chamber, and can in particular be designed at right angles from this line. Preferably, the pressure line can be connected and / or connected with a pressure pump via the pressure inlet. It can be provided accordingly that, in the assembled state and / or in the case of all connections being present, the hydraulic booster of the vehicle, and by means of the fourth fluid, can be loaded with a (fourth) pressure, for example 200 bar, via the pressure inlet, the pressure line, the pressure chamber, the pressure outlet and / or the inlet of the hydraulic booster, whereby the hydraulic booster can advantageously be more easily actuated, preferably independently of the relative position or the rotation of the rotatable part relative to the stationary part (also continuously). This can improve safety and / or comfort. Here, the fourth fluid can be present in the aforementioned components and / or a (continuous) fluid connection can be transmitted from the pressure pump to the hydraulic booster, in particular by means of the application of pressure and / or movement by the pressure pump. Preferably, the pressure inlet and the pressure outlet are arranged opposite in the first operating position and / or parallel in the second operating position. Here, the pressure outlet can be arranged at the uppermost end of the rotatable part and / or the pressure inlet can be arranged at the lowermost end of the stationary part. Particularly high safety can thus be achieved, in particular due to the maximum spacing (of the part with the fluid with the highest pressure).

[0044] It can also be considered that the rotatable part has

[0045] - a return line (for conducting the fifth fluid), in particular with a return inlet connected with the return line,

[0046] wherein the stationary part has

[0047] - a return outlet (for discharging the fifth fluid), wherein the return line is connected with the return outlet via a return chamber, wherein the return chamber is provided for providing a continuous fluid connection (for the fifth fluid) between the return line and the return outlet.

[0048] The fifth fluid can be identical to the second and / or fourth fluid, in particular both can be provided for operating the (same) hydraulic steering system, preferably in the case of approximately 200 bar. It can be considered here that the fifth fluid corresponds to the return fourth fluid. It can be provided that the second, fourth and / or fifth pressure is identical (for example 200 bar, respectively). Alternatively, it can be provided that (at least sometimes) a pressure difference exists. In other words, the fifth fluid can have a further, in particular lower, fifth pressure, which is provided only for operating the steering system. Here, the fifth fluid and / or the fifth pressure can be provided for providing the return to the return tank. It is likewise considered here that the fifth pressure is designed to be lower than the first pressure and / or lower than 40 bar. Thereby, all fluids and / or all systems (for example the steering system and the brake system) can be led away via the return, the return chamber and / or the return outlet, respectively. It is particularly preferred that the first, second, third, fourth and / or fifth fluid, preferably in the case of a leak, can be led away via the return chamber and / or the return outlet. Thereby, a particularly high safety and / or robustness can be provided.

[0049] The return duct can be provided for guiding the fifth fluid. The return duct can be connected (or connected) with the return outlet via the return chamber. The return duct can be connectable / connected with the outlet of the (steering) hydraulic booster and / or the return tank (of the respective steering system). Here, the return tank can be designed as a storage and / or compensation means for the hydraulic booster, in particular via the fifth fluid and / or the rotary lead-through. Preferably, this can be possible continuously and / or independently of the operating position. The return duct is preferably arranged parallel and / or spaced apart from the rotary axis and / or the pressure duct. Thereby, the return duct can guide the fifth fluid, in particular upwards from above (unless stated otherwise, starting from the assembled state) and / or separated from the fifth fluid (or other fluids). Preferably, the return duct can be arranged in front (in the driving direction) and / or before the pressure duct and / or in the middle (with respect to the transverse direction) in the rotatable portion. Here, the return duct can be constructed approximately in the middle along the entire height of the rotatable portion and, for example, can be constructed over 40% to 60% of the height of the rotatable portion.

[0050] The return outlet can be provided for outputting the fifth fluid, in particular for guiding it to the inlet of the return tank (see above). The return outlet and / or the return inlet can be designed angularly, in particular at right angles, with respect to the return duct. The return outlet and / or the return inlet can be designed pointing in the forward direction and / or in the rearward direction. Preferably, the pressure inlet and the return outlet are designed parallel to each other and / or pointing in the same direction. Thereby, a particularly good accessibility and / or easy coupling / disconnection can be achieved. The return outlet (with respect to the rotary axis) can be arranged (directly) above and / or next to the pressure inlet and / or the first / second outlet.

[0051] The rotatable part is preferably rotatably supported and / or arranged relative to the stationary part about the axis of rotation such that a backflow chamber is configured between and / or by the stationary part and the rotatable part, which is provided for providing a (for the fifth fluid) permanent (in particular temporally permanent and / or predominantly permanent) fluid connection between the backflow duct and the backflow outlet. Thereby, the (fifth) fluid can flow through, in particular permanently through, the backflow duct (or a portion connected thereto). This can increase safety and / or provide (in particular of a hydraulic booster) a (permanent) pressure relief. Here, the backflow chamber can also be configured when no rotational movement occurs. Here, the backflow chamber can connect the backflow duct and the backflow outlet. Here, the backflow chamber can be configured between the surfaces of the stationary part and the rotatable part pointing towards each other. Here, the backflow chamber can be configured by the (geometric) design of the surfaces of the stationary part and the rotatable part pointing towards each other. Thereby, the chamber can be configured without components and / or based on the geometry only. For example, the stationary part and / or the rotatable part is configured as the backflow chamber in particular in the (along the direction of rotation or the axis of rotation) middle portion and / or the second or third stage (with increasing diameter in steps relative to the rotatable part). Preferably, the backflow chamber can be arranged here between the second stage and the third stage of the rotatable part. Here, the rotatable part can have a (preferably circumferential and / or annular) protrusion beside and / or below which the backflow chamber is configured. Thereby, the guidance of the rotatable part relative to and / or in the stationary part can be improved. The protrusion can have a rounding inwards and / or towards the axis of rotation, thereby advantageously making the assembly and / or introduction of the rotatable part into the stationary part easy. The stationary part can have a fixed protrusion which is in particular adjacent to the second stage of the rotatable part. Thereby, the guidance of the rotatable part relative to and / or in the stationary part can be improved. The fixed protrusion can be angularly and / or rounded designed, thereby advantageously making the assembly and / or introduction of the rotatable part into the stationary part easy. For example, the stationary part and / or the rotatable part can have different diameters and / or (circumferential) grooves in particular at the same height (along the axis of rotation and / or in the assembled state), which preferably have a rectangular, square and / or trapezoidal cross section. Thereby, the backflow chamber can be designed point-symmetrically, axially-symmetrically (relative to the axis of rotation), as an annular chamber, annularly and / or as a cylindrical surface. This can allow a simple and / or cost-The seal(s) can have an elastic and / or pressure-resistant material, for example an elastomer. The seal(s) can be designed as an O-ring, an x-ring and / or a cylindrical surface.

[0052] It is particularly preferred that the return flow chamber accommodates leaks which exit via the first and / or second deflection duct (from above) and / or the second chamber (from below). Thereby, these leaks can be carried away. Preferably, here the functionality can be maintained in other respects at least sometimes. This can improve the safety and / or the robustness. Here, leaks can occur, for example, when the seal is not tight, in particular in the case of wear and / or malfunctions. Leaks can also occur when the rotary passage, in particular the fixed part and / or the rotatable part, has wear and / or (geometric) errors. It can be particularly preferred here that higher pressures of the steering system, for example 200 bar, do not influence the lower pressures of the brake system, for example 40 bar.

[0053] The return flow inlet can be arranged in the rotatable part. The return flow inlet can be preferably connected with the return flow duct and designed branched from this duct, in particular at right angles. Preferably, the return flow duct is connectable and / or connected via the return flow inlet with the hydraulic booster, in particular the outlet of the hydraulic booster. It can be provided accordingly that the hydraulic booster of the vehicle (and by the fifth fluid) in the assembled state and / or in the case of all connections being present can be at least partially emptied via the return flow inlet, the return flow duct, the return flow chamber, the return flow outlet and / or the inlet of the return flow tank, and / or fluid can be carried away from this part (of the brake system), whereby too high a pressure can advantageously be prevented. By the configuration of the return flow chamber, this connection can be present permanently. Here, the fifth fluid (to) can be within the aforementioned components and / or can transmit the (continuous) fluid connection from the return flow tank up to the hydraulic booster. Preferably, the return flow inlet and the return flow outlet are arranged opposite in the first operating position and / or parallel in the second operating position. Here, the return flow outlet can be arranged below (relative to the axis of rotation) the return flow inlet. Here, the return flow inlet can be arranged below the pressure outlet. Here, the return flow outlet can be arranged above the pressure inlet.

[0054] It is optionally possible in the case of the application that a leakage chamber is provided which is arranged between the fixed part and the rotatable part, wherein the rotatable part has a leakage duct which connects the leakage chamber and the return flow chamber in order to carry away leaks, in particular from the pressure chamber and / or the first chamber, via the leakage duct into the leakage chamber.

[0055] It is particularly preferred possible that the leakage chamber accommodates leakages out of (or from) the first chamber (from above) and / or (particularly preferably) the pressure chamber (from below). Thereby, these leakages can be carried away. Preferably, here the functionality can be maintained otherwise (at least sometimes). This can improve safety and / or robustness. Here, for example, a leakage can occur, for example, when a seal (for example between the first chamber and the leakage chamber and / or between the leakage chamber and the pressure chamber) is not tight, for example, in the event of wear and / or failure. A leakage can also occur when the rotary lead-through, in particular the fixed part and / or the rotatable part, has wear and / or (geometric) errors. It can be particularly preferred here to prevent (higher) pressure (for example 200 bar) and / or a fluid from the pressure chamber, in particular of a steering system, the pressure line and / or the pressure inlet, from influencing a lower pressure (for example 40 bar) and / or a fluid in the first chamber, in particular of a brake system. Thus, for example, a (undesired and / or unexpected) complete braking (see above) can be prevented.

[0056] The rotatable part is preferably rotatably supported and / or arranged relative to the stationary part about the axis of rotation such that a leakage chamber is configured between and / or by the stationary part and the rotatable part, which is thereby provided for accommodating leakage from the first chamber and / or the pressure chamber (or the part adjacent and / or connected thereto, respectively). Thereby, the (outgoing) first fluid and / or the fourth fluid can be accommodated and / or drawn off, in particular. This can particularly advantageously increase safety. Here, the leakage chamber can also be configured when no rotational movement is taking place, preferably. Therein, the leakage chamber can be configured between the surfaces of the stationary part and the rotatable part pointing at each other. Therein, the leakage chamber can be configured by the (geometric) design of the surfaces of the stationary part and the rotatable part pointing at each other. Thereby, the chamber can be configured without additional components and / or based on the geometry alone. For example, the stationary part and / or the rotatable part can be configured as the leakage chamber, in particular in the lower part (in the direction of rotation or the axis of rotation) of the rotatable part and / or in the first and / or second stage (with increasing diameter in steps relative to the rotatable part). Preferably, the leakage chamber can be arranged here between the first and second stages of the rotatable part. Therein, the rotatable part can have a first diameter (the lowermost), beside which, in particular externally, the leakage chamber can be arranged. Therein, the rotatable part can have a second section and / or a second diameter, in particular above the section with the first diameter, wherein the leakage chamber is arranged below the second section. Therein, the stationary part can be configured substantially complementarily, wherein, preferably along the axis of rotation (in the assembled state), the rotatable part and the stationary part (at the height of the leakage chamber) have a spacing in order to thereby constitute the leakage chamber. Alternatively or additionally, it is possible that the stationary part and / or the rotatable part have different diameters and / or (encircling) grooves, in particular at the same height (in the direction of the axis of rotation and / or in the assembled state), which preferably have a rectangular, square and / or trapezoidal cross section. Thereby, the leakage chamber can be designed point-symmetrically, axially symmetrically (relative to the axis of rotation), as an annular chamber, annularly and / or as a cylindrical surface. This can allow a simple and / or cost- appropriate manufacture. This can also make a high stability possible. It can be provided that the leakage chamber is sealed by at least one seal, preferably two seals, in particular relative to the adjacent chamber, for example the first (upper) chamber and / or the (lower) pressure chamber (for example by a pressure seal). The seal(s) can be designed encircling and / or arranged symmetrically around the axis of rotation. The seal(s) can have an elastic and / or pressure-resistant material, for example an elastomer. The seal(s) can be designed as O-rings, x-rings and / or cylindrical surfaces.

[0057] It is particularly preferred that the rotatable part has a leakage duct which connects the leakage chamber and the return chamber in order to facilitate the removal of leakage, in particular from the pressure chamber and / or the first chamber, into the leakage chamber via the leakage duct. Correspondingly, the leakage duct can be provided for removing leakage (or fluid). To this end, the leakage duct can be designed hook-like. Here, the leakage duct can be designed in sections parallel to the axis of rotation, in particular in a lower section which is connected to the leakage chamber. Here, the leakage duct can be configured angularly (relative to the axis of rotation), in particular at an acute angle (pointing downward and outward), in particular in an upper section which is connected to the return chamber. The leakage duct can be arranged behind and / or spaced apart from the pressure duct in the first operating position. By means of the hook-like design, simple production can be made possible, wherein the lower section can be machined from below, preferably by drilling, and / or the upper section can be machined from obliquely below, preferably by a further (angular) drilling, which preferably intersects the lower section or the drilling thereof, in order to advantageously configure the (hook-like) leakage duct. Simple production can thus be achieved. It is particularly preferred that the rotatable part can accordingly be made from a single (continuous) component, wherein the (geometric) design, the ducts and / or chambers can be (completely) machined by drilling and / or milling.

[0058] It is furthermore possible in the case of the application that the first operating position is provided for forward travel of the vehicle, while the second operating position is provided for rearward travel of the vehicle, and / or the at least one locked position is between the first operating position and the second operating position.

[0059] With regard to the application, it is conceivable that the fixed part has:

[0060] - a first steering outlet and

[0061] - a second steering outlet;

[0062] wherein the rotatable part has, in particular for guiding the second fluid:

[0063] - a first steering duct which is connected to the first steering outlet in the first operating position and (in alignment) to the second steering outlet in the second operating position, in particular via a first steering adapter and / or a first steering outlet adapter,

[0064] - a second steering duct which is connected (in alignment) to the second steering outlet in the first operating position and (in alignment) to the first steering outlet in the second operating position, in particular via a second steering adapter.

[0065] In this context, the concept of "steering" can preferably refer to a (hydraulic) steering system. Alternatively, however, it is equally conceivable that these systems (braking system and steering system) are replaced.

[0066] It is possible to provide that the first steering conduit and / or the second steering conduit (or a component connected therewith, see above or below) conducts the second fluid. Preferably, the first steering conduit and / or the second steering conduit can be associated with a hydraulic steering system. Accordingly, the second fluid can be provided for transmitting a steering movement (of a hydraulic power steering) in particular by force transmission. Due to the changed coupling situation between the first operating position and the second operating position, the steering system changes its direction of action. Accordingly, it is possible to provide that the first steering conduit and / or the second steering conduit conducts the second fluid. It is possible to provide here that the first steering conduit (or a component connected therewith) conducts a first portion of the second fluid and the second steering conduit (or a component connected therewith) conducts a second portion of the second fluid. Thereby, it is possible to load at least sometimes, for example in the first or second operating position, with different pressures (for example in order to steer). Due to the change between the first operating position and the second operating position, however, a replacement or change can be achieved. In this regard, it is possible to refer to the (uniform) second fluid in the context of the present application.

[0067] It is possible to provide here that (only) in the case of steering, in particular in the first and / or second operating position, a pressure difference exists in the first and second conduits in order to advantageously enable steering of the vehicle.

[0068] The first steering conduit can be arranged parallel to and / or spaced apart from the rotation axis, the pressure conduit and / or the first conduit. Here, the first conduit can be arranged between the pressure conduit and the first steering conduit. Here, the first steering conduit can be arranged in particular to the right of the rotation axis in the driving direction or forward direction of travel. The first steering conduit can be connectable and / or connected via the first steering inlet to a first (right) output of the (steering) hydraulic power steering. For example, it is thereby possible to achieve a steering to the right (of the hydraulic power steering) or a steering (of the wheels) to the right. The steering can be transmitted via the second fluid, for example, which is loaded with a pressure and / or moved (via a corresponding fluid connection). Here, the first steering inlet can be arranged at an angle, in particular at a right angle, to the first steering conduit. Preferably, the first and second steering inlets can be designed in parallel.

[0069] The first steering conduit can be connected with a first steering connector, wherein it is in particular designed at a right angle to one another. Preferably, the first steering conduit, the first steering connector, the first steering outlet connector and / or the first steering outlet can have the same diameter. This can achieve an improved and / or laminar (through) flow.

[0070] The second steering conduit can be arranged parallel and / or spaced apart from the rotation axis, the pressure conduit and / or the second conduit. Here, the second conduit can be arranged between the pressure conduit and the second steering conduit. Here, the second steering conduit can be arranged, in particular in the driving direction or in the forward travel, to the left of the rotation axis. The second steering conduit is preferably connectable and / or connected via the second steering inlet with the second (left) output of the (steering) hydraulic booster. For example, a (left) steering lock at the hydraulic booster to a certain steering direction to the left or a (wheel) steering lock can thereby be realized. The steering lock can be transmitted via the second fluid, which is loaded with pressure and / or moved (via the respective fluid connection). Here, the second steering inlet can be arranged at an angle, in particular at a right angle, to the second steering conduit.

[0071] The second steering conduit can be connected with the second steering connector, wherein it is designed, in particular, at a right angle to one another. Preferably, the second steering conduit, the second steering connector and the second steering outlet can have the same diameter. This can realize an improved and / or laminar (through) flow.

[0072] The first steering outlet can be configured perpendicular to the rotation axis and / or the first steering conduit. Preferably, the first steering outlet can be connected, in particular in the first operating position, with the first steering outlet connector, which is preferably arranged at a right angle to the first steering outlet connector. Here, the first steering outlet connector can be manufactured by a (lateral) drilling in the stationary part, wherein the drilling can be closed and / or closed externally or outwardly by a plug. The first steering outlet connector can be connected, preferably in particular in the first operating position, with the first steering connector, wherein it is arranged, in particular, at a right angle. By the double right-angled arrangement, the first steering outlet can advantageously be directed in the same direction as the second steering outlet. This can make a more comfortable and / or more practical use possible. It can be particularly preferably provided that, in the second operating position, the first steering outlet is arranged (in line) with the second steering outlet. Accordingly, a change of connection can be realized by the rotation of the rotatable part between the first operating position and the second operating position (or vice versa). The reversal of the steering action can thereby be advantageously realized in such a way that a steering lock at the hydraulic booster in a certain direction, for example left or right, actually causes the (intuitive) desired steering effect. The first steering outlet can be connected with the first (right) hydraulic steering cylinder in order to load it preferably with pressure and / or to actuate.

[0073] The second steering outlet can be configured perpendicular to the rotation axis and / or the second steering conduit. It is particularly preferred if the second steering outlet is arranged (in alignment) with the second steering outlet in the first operating position. Preferably, the second steering outlet can be connected, in particular in the second operating position, with the first steering outlet connection, which is preferably arranged at right angles to the second steering connection. Correspondingly, a change of connection can be achieved by a rotation of the rotatable part between the first operating position and the second operating position (or vice versa). Hereby, it can be advantageously achieved that a steering action is reversed, in that a turning of the hydraulic power steering in one direction (for example left or right) actually causes the (intuitive) desired steering effect. The second steering outlet can be connected to the second (left) hydraulic steering cylinder in order to load it, preferably with pressure and / or to actuate it.

[0074] It can be particularly preferred if at least two, preferably all of the following components are arranged on the same side of the rotatable part:

[0075] - the first steering inlet,

[0076] - the second steering inlet,

[0077] - the first inlet,

[0078] - the second inlet,

[0079] - the pressure outlet, and / or

[0080] - the return inlet.

[0081] Hereby, a particularly compact, practical and / or robust design can be achieved. Furthermore, the coupling and / or decoupling can be achieved accordingly from one side.

[0082] Furthermore, it is conceivable that the rotatable part, in particular its outer contour, is designed in steps perpendicular to the rotation axis, in particular in steps and / or in a segmented cylindrical manner.

[0083] Here, the rotatable part (see above or the figures) can be designed in steps in the lower part, for example the lower half. Here, the rotatable part can be designed rotationally symmetrical and / or in a (segmented) cylindrical manner. Here, the rotatable part can have a first diameter / segment (lowermost), a second diameter / segment (above it), a third diameter / segment (further above it) and / or a fourth diameter / segment (still further above it), in particular with respect to the rotation axis. This can make simple production possible. Preferably, the fixed part can be configured (correspondingly) complementary to the rotatable part, in particular in the lower segment(s). Hereby, the configuration of the chamber (see above) in the assembled state can be made possible in a simple and / or reliable manner.

[0084] It can be advantageous in the context of the application if at least one seal for sealing the first chamber is provided, which circumferentially surrounds the rotatable part, wherein in particular the different chambers are separated from one another by the at least one seal.

[0085] It is possible in the context of the application if the first fluid and the second fluid are separated from one another along the axis of rotation through at least one chamber, in particular the return flow chamber and / or the leakage chamber.

[0086] Preferably, the seal or the seals are provided for separating the different chambers (correspondingly) from the adjacent (and remaining) chambers. Thereby an exchange of fluids can preferably be prevented. It can be provided that the rotatable part and / or the fixed part have grooves in order to allow, stabilize and / or simplify the arrangement of the seal.

[0087] It can be provided in the context of the application that the rotary passage, in particular the fixed part and / or the rotatable part, has at least one bearing, in particular a rolling bearing, wherein between the fixed part and the rotatable part at least one bearing body, in particular a rolling body of the rolling bearing, is arranged in order to make a rotatable bearing of the rotatable part about the axis of rotation possible.

[0088] Here, the bearing can advantageously withstand (axial) forces, for example during operation and / or due to high pressures. Alternatively or additionally, the bearing can be provided for a locking function (see below). The bearing can guide the rotatable part (in the case of rotation) relative to the fixed part. Here, the bearing can be constituted between (the surfaces of) the rotatable part and / or the fixed part. Here, the bearing can be constituted at the fixed part (for example internally) and / or at the rotatable part (for example externally) by (encircling) bearing tracks, wherein the rolling tracks are preferably complementary to the bearing body, in particular the rolling body, in particular with regard to their cross section. Preferably, the bearing body and / or the rolling body can be constituted as a ball. Here, the introduction of the bearing body can be achieved via an (reversibly unclosable) opening, which is preferably arranged in the fixed part, for example approximately perpendicular to the axis of rotation (in front or behind in the direction of travel). Here, the closure can be achieved via a closure, which is provided for closing the opening (even at high pressures of for example 200 bar). It can be provided here that the closure cannot be detached without tools and / or without damage. Thereby the safety can be increased. Alternatively, it can be provided that the closure is reversibly unclosable by fixing means, in particular screws, preferably two screws, at the fixed part. Thereby the assembly and / or the maintenance can be simplified.

[0089] Furthermore, it can be considered that the bearing, in particular the rolling bearing, is provided for locking the movement along the axis of rotation between the fixed part and the rotatable part.

[0090] It can be provided here that the introduction of the at least one bearing body, in particular of the (spherical) rolling body, prevents (locks) the (re) extraction of the rotatable part from the fixed part, in particular after the introduction of the rotatable part into the fixed part. Thereby a locking effect and / or a locking can advantageously be achieved. Thus, despite high pressure, it is not possible for the rotatable part to be (accidentally) removed (or pressed out) from the fixed part. Correspondingly, the locking effect can be configured in particular upwards along the vertical line and / or the rotational axis. It can be provided that the at least one bearing body, in particular the rolling body, is arranged in a cage. Here, the cage can have a complementary shape to the bearing body or the rolling body. Thereby, the at least one bearing body or the rolling body can be held in a (mutually) fixed position or spacing.

[0091] According to a second aspect, the above object is achieved by a vehicle according to the invention, comprising a rotational lead-through according to the first aspect (see above).

[0092] Here, the vehicle can comprise a (passenger) motor vehicle, a goods motor vehicle, a special vehicle, a work vehicle or a commercial vehicle (for example an agricultural vehicle, a tractor, a combine harvester, a forklift) and / or a construction vehicle. Preferably, the vehicle can make possible, by using the rotational lead-through, an (improved) use of the vehicle not only in the first operating position and / or in the second operating position. In the simplest case, for example a driver (together with the rotatable part) can change between the first operating position and the second operating position on his seat in order to monitor and / or perform work accordingly (for example in front of the vehicle and / or by means of the vehicle).

[0093] Thus, the same advantages are derived with respect to the vehicle according to the invention as have been described with respect to the rotational lead-through according to the invention.

[0094] It can furthermore be provided that, according to a further (third) aspect, a hydraulic system for a vehicle is provided, comprising a hydraulic brake system and / or a hydraulic steering system, in particular comprising a rotational lead-through according to the first aspect. The same advantages are thus derived with respect to the hydraulic system as have been described with respect to the rotational lead-through and / or the vehicle according to the invention.

[0095] It can furthermore be provided that, according to a further (fourth) aspect, a rotatable and / or swingable system for a vehicle is provided, comprising a hydraulic system and / or a rotational lead-through according to the first aspect. Here, it can for example be a swingable tower, which can be arranged on an agricultural machine. The same advantages are thus derived with respect to such a system as have been described with respect to the rotational lead-through and / or the vehicle according to the invention.

[0096] The turnable and / or swingable system can for example have one of the following features, which can be turnable and / or swingable in particular with respect to the vehicle:

[0097] a plate or a turnable surface, on which the remaining components are preferably arranged,

[0098] a work device, which is provided for assuming a work step, for example a bucket,

[0099] a seat (for the driver),

[0100] at least one, in particular two brake pedals, which are preferably provided for operating a hydraulic brake system, and / or

[0101] a control device, for example a steering wheel, which can be provided for operating a hydraulic steering system.

[0102] Correspondingly, the above-mentioned components can be turned (synchronously) with the turnable part, respectively. This is preferably also the case for the driver, respectively. The driver can advantageously be oriented with the turnable part, respectively. The driver can always look "in the right direction", respectively. This can make an improved operability and / or safety possible (in the case of a vehicle and / or system operation). BRIEF DESCRIPTION OF DRAWINGS

[0103] Further advantages, features and details of the application result from the following description, in which several embodiments of the application are described in detail in the case of a reference to the drawings. Herein, the features mentioned in the description included in the application can be important for the application, respectively, individually or in any combination. Herein, the following is shown schematically, respectively:

[0104] Figure 1 A turnable lead-through is shown,

[0105] Figure 2 A turnable lead-through is shown,

[0106] Figure 3 A turnable lead-through is shown,

[0107] Figure 4 A turnable lead-through is shown,

[0108] Figure 5 A turnable lead-through is shown,

[0109] Figure 6 A turnable lead-through is shown,

[0110] Figure 7 A turnable lead-through is shown, and

[0111] Figure 8A vehicle is shown.

[0112] In the following figures the same reference signs are used for the same technical features, even if from different embodiments. DETAILED DESCRIPTION

[0113] Figure 1 A swivel-through 100 is shown, which has:

[0114] - a fixed part 10 (lower), with:

[0115] o a pressure inlet 13,

[0116] o a return outlet 14,

[0117] o a first swivel outlet 15,

[0118] o a second swivel outlet 16,

[0119] - a rotatable part 20 (upper), with:

[0120] o a second inlet 22.1,

[0121] o a pressure outlet 23.1,

[0122] o a return inlet 24.1,

[0123] o a first swivel inlet 25.1,

[0124] o a second swivel inlet 26.1.

[0125] Figure 2 A swivel-through 100 is shown in the form of a central cross-section (plane spanned by the swivel axis V and the driving direction), in particular in the first operating position I. Here, the fixed part 10 has:

[0126] - the pressure inlet 13,

[0127] - the return outlet 14,

[0128] - the leakage duct 14.1,

[0129] Here, the rotatable part 20 has:

[0130] - the pressure duct 23,

[0131] - the pressure outlet 23.1,

[0132] - the return duct 24,

[0133] - the return inlet 24.1.

[0134] Here, a leakage chamber 35 and a return chamber 34 are configured between the fixed part 10 and the rotatable part 20. It is connected with the leakage duct 14.1, whereby fluid can advantageously flow out of the leakage chamber 35, in particular into the return chamber 34.

[0135] Figure 3 The rotatable passage 100 is shown in a central / middle plane, which is spanned by the axis of rotation V and the lateral direction. Here, the rotatable part 20 is rotatable relative to the fixed part 10 about the axis of rotation V. Here, the fixed part 10 has:

[0136] - a pressure inlet 13,

[0137] - a first deflection outlet 15,

[0138] Here, the rotatable part 20 has:

[0139] - a first duct 21, which is connected with the first chamber 31,

[0140] - a first inlet 21.1, which is connected with the first duct 21,

[0141] - a second duct 22, which is connected with the second chamber 32,

[0142] - a second inlet 22.1, which is connected with the second duct 22,

[0143] - a pressure duct 23, which is connected with the pressure inlet 13,

[0144] - a pressure outlet 23.1, which is connected with the pressure duct 23,

[0145] - a first deflection duct 25, which is closed in particular below by a plug,

[0146] - a first deflection inlet 25.1, which is connected with the first deflection duct 25,

[0147] - a first deflection connection 25.2, which is connected with the first deflection duct 25 and which is preferably connected in the first operating position I with the first deflection outlet 15 and in the second operating position II with the second deflection outlet 16 (not visible here),

[0148] - a second deflection duct 26, which is closed in particular below by a plug,

[0149] - a second deflection inlet 26.1, which is connected with the second deflection duct 26,

[0150] - a second deflection connection 26.2, which is connected with the second deflection duct 26 and which is preferably connected in the first operating position I with the second deflection outlet 16 (not visible) and in the second operating position II with the first deflection outlet 15.

[0151] The stationary part 10 and / or the rotatable part 20 are (so) configured, in particular stepwise, i.e. between them are configured:

[0152] - a first chamber 31 connected to the first duct 21,

[0153] - a second chamber 32 connected to the second duct 22,

[0154] - a pressure chamber 33 connected to the pressure duct 23 and to the pressure inlet 13,

[0155] - a return flow chamber 34,

[0156] - a leakage chamber 35,

[0157] - a bearing 40, in which at least one bearing body 41 or a plurality of rolling bodies (e.g. balls) are accommodated.

[0158] Figure 4 The rotatable passage 100 is shown from the rear, with the direction of travel pointing into the plane of the drawing. Here, the lower part 10 has:

[0159] - a first outlet 11 connected to the first duct 21,

[0160] - a second outlet 12 connected to the second duct 22,

[0161] - a pressure inlet 13,

[0162] - a return flow outlet 14.

[0163] Figure 5 The rotatable passage 100 is shown in a cross-section perpendicular to the rotation axis V at the height of the first inlet 21.1 and the second inlet 22.1, which can be arranged at an acute angle to each other.

[0164] Figure 6 The rotatable passage 100 is shown in a cross-section perpendicular to the rotation axis V at the height of the first steering nipple 25.2 and the second steering nipple 26.2. The first operating position I is shown here. Here, the (external) stationary part 10 has:

[0165] - a pressure inlet 13,

[0166] - a return flow outlet 14,

[0167] - a first steering outlet 15,

[0168] - a steering outlet nipple 15.1,

[0169] - a second steering outlet 16.

[0170] Here, the rotatable part 20 (inside) with the round outer contour has:

[0171] - a first duct 21,

[0172] - a second duct 22,

[0173] - a pressure duct 23,

[0174] - a return duct 24,

[0175] - a first steering duct 25 connected with a first steering adapter 25.2,

[0176] - a first steering adapter 25.2 which is connected (in the first operating position I) with the first steering outlet 15, in particular via a steering outlet adapter 15.1,

[0177] - a second steering duct 26 connected with a second steering adapter 26.2,

[0178] - a second steering adapter 26.2 which is connected (in the first operating position I) with the second steering outlet 16 (in alignment).

[0179] Figure 7 With reference to Figure 6 The rotatable passage 100 is shown in the second operating position II. Here, the first operating position I (for example in the case of 0°) is twisted about the rotation axis V relative to the second operating position II (for example in the case of 180°). Here, the rotatable part 20 is twisted (by 180°) relative to the fixed part 10. As a result, in the second operating position II the first steering adapter 25.2 is connected (in alignment) with the second steering outlet 16. Furthermore, the second steering adapter 26.2 is connected with the first steering outlet 15, in particular via the steering outlet adapter 15.1. As a result, a change in the direction of action can be achieved.

[0180] Furthermore, the figures show a rotatable passage 100 for a hydraulic steering system and / or a hydraulic brake system in a vehicle 200, having:

[0181] - a fixed part 10 having:

[0182] o a first outlet 11 for a first fluid,

[0183] - a rotatable part 20 having:

[0184] o a first duct 21 which is provided for guiding the first fluid, wherein the first duct 21 can be connected with the first outlet 11 via a first chamber 31,

[0185] - wherein the rotatable part 20 is so rotatably supported relative to the stationary part 10 about the rotation axis V that

[0186] o a first chamber 31 is configured between the stationary part 10 and the rotatable part 20, which is provided for providing a permanent fluid connection for the first fluid between the first duct 21 and the first outlet 11 and / or

[0187] o the rotation passage 100 makes possible a passage of the second fluid in at least a first operating position I and a second operating position II and is locked in at least one locking position.

[0188] It can be provided here that the first operating position I and the second operating position II are oriented opposite one another, in particular twisted by substantially 180° with respect to the rotation axis V, in particular oriented vertically.

[0189] It can be provided here that the first operating position I makes possible a passage of the at least one further fluid in a first angular range, which is between 0 and 45°, in particular between 0 and 35°, preferably between 0 and 25°, and / or the second operating position II makes possible a passage of the at least one further fluid in a second angular range, which is between 180° and 135°, in particular between 180° and 145°, preferably between 180° and 155°.

[0190] It can be provided here that the stationary part 10 has a second outlet 12, wherein the rotatable part 20 has a second duct 22, wherein the second duct 22 is connectable to the second outlet 12 via a second chamber 32, wherein in particular the second chamber 32 is configured between the stationary part 10 and the rotatable part 20 and is provided for providing a permanent fluid connection between the second duct 22 and the second outlet 12.

[0191] It can be provided here that the rotatable part 20 has

[0192] - a pressure duct 23, in particular with a pressure outlet 23.1 connected to the pressure duct 23,

[0193] wherein the stationary part 10 has:

[0194] - a pressure inlet 13, wherein the pressure duct 23 is connected to the pressure inlet 13 via a pressure chamber 33, wherein the pressure chamber 33 is provided for providing a permanent fluid connection between the pressure duct 23 and the pressure inlet 13.

[0195] It can be provided here that the rotatable part 20 has:

[0196] - a return conduit 24, in particular with a return inlet 24.1 connected to the return conduit 24, wherein the stationary part 10 has

[0197] - a return outlet 14, wherein the return conduit 24 is connected to the return outlet 14 via a return chamber 34, wherein the return chamber 34 is provided for providing a permanent fluid connection between the return conduit 24 and the return outlet 14.

[0198] It is furthermore possible that a leakage chamber 35 is provided, which is arranged between the stationary part 10 and the rotatable part 20, wherein the rotatable part 20 has a leakage conduit 14.1, which connects the leakage chamber 35 and the return chamber 34, in order to lead away leakage, in particular from the pressure chamber 33 and / or the first chamber 31, into the leakage chamber 35 via the leakage conduit 14.1.

[0199] It is possible here that the first operating position I is provided for a forward running of the vehicle 200, while the second operating position II is provided for a backward running of the vehicle 200, and / or that the at least one locking position is between the first operating position I and the second operating position II.

[0200] It is furthermore possible that the stationary part 10 has:

[0201] - a first steering outlet 15 and

[0202] - a second steering outlet 16,

[0203] wherein the rotatable part 20, in particular for guiding the second fluid, has:

[0204] - a first steering conduit 25, which is connected to the first steering outlet 15 in the first operating position I and to the second steering outlet 16 in the second operating position II, in particular via a first steering connector 25.2,

[0205] - a second steering conduit 26, which is connected to the second steering outlet 16 in the first operating position I and to the first steering outlet 15 in the second operating position II, in particular via a second steering connector 26.2.

[0206] It is furthermore possible that the rotatable part 20, in particular its outer contour, is designed in steps perpendicular to the rotation axis V, in particular in a stepped-cylindrical manner.

[0207] It is furthermore possible that at least one sealing for sealing the first chamber 31 is provided, which circumferentially surrounds the rotatable part 20, wherein in particular the different chambers 31, 32, 33, 34, 35 are separated from each other by the at least one sealing.

[0208] It can be provided here that the first fluid and the second fluid are separated from one another along the rotational axis V by at least one chamber 34, 35, in particular the return chamber 34 and / or the leakage chamber 35.

[0209] Furthermore, it can be considered that the rotary passage 100, in particular the fixed part 10 and / or the rotatable part 20, has at least one bearing 40, in particular a rolling bearing, wherein at least one bearing body 41, in particular a rolling body of the rolling bearing, is arranged between the fixed part 10 and the rotatable part 20 in order to enable rotatable support of the rotatable part 20 about the rotational axis V.

[0210] It can be provided here that the bearing 40, in particular the rolling bearing, is designed to lock movement along the rotational axis V between the fixed part 10 and the rotatable part 20.

[0211] Figure 8 A vehicle 200 comprising the rotary passage 100 is shown.

[0212] List of reference signs

[0213] 10 fixed part

[0214] 11 first outlet

[0215] 12 second outlet

[0216] 13 pressure inlet

[0217] 14 return outlet

[0218] 14.1 leakage duct

[0219] 15 first deflection outlet

[0220] 15.1 deflection outlet stub

[0221] 16 second deflection outlet

[0222] 20 rotatable part

[0223] 21 first duct

[0224] 21.1 first inlet

[0225] 22 second duct

[0226] 22.1 second inlet

[0227] 23 pressure duct

[0228] 23.1 pressure outlet

[0229] 24 return duct

[0230] 24.1 backflow inlet

[0231] 25 first deflection duct

[0232] 25.1 first deflection inlet

[0233] 25.2 first deflection connection

[0234] 26 second deflection duct

[0235] 26.1 second deflection inlet

[0236] 26.2 second deflection connection

[0237] 31 first chamber

[0238] 32 second chamber

[0239] 33 pressure chamber

[0240] 34 backflow chamber

[0241] 35 leakage chamber

[0242] 40 bearing

[0243] 41 bearing body

[0244] 100 rotary lead-through

[0245] 200 vehicle

[0246] I first operating position

[0247] II second operating position

[0248] V rotary axis

Claims

1. A rotary feedthrough (100) for a hydraulic steering system and / or a hydraulic brake system in a vehicle (200), having: - a stationary part (10) having: o a first outlet (11) for a first fluid; - a rotatable part (20) having: o a first duct (21) connectable to the first outlet (11) via a first chamber (31); - wherein the rotatable part (20) is rotatably supported relative to the stationary part (10) about a rotary axis (V) such that o the first chamber (31) is configured between the stationary part (10) and the rotatable part (20) and is arranged for providing a permanent fluid connection for the first fluid between the first duct (21) and the first outlet (11); and / or o the rotary feedthrough (100) enables a feedthrough of a second fluid in at least a first operating position (I) and a second operating position (II) and blocks it in at least one blocking position. The first operating position (I) and the second operating position (II) are oriented opposite to each other, in particular substantially twisted by 180° about a rotary axis (V) which is in particular oriented vertically. The first operating position (I) enables a feedthrough of at least one further fluid in a first angular range which is between 0 and 45°, in particular between 0 and 35°, preferably between 0 and 25°, and / or The second operating position (II) enables a feedthrough of at least one further fluid in a second angular range which is between 180° and 135°, in particular between 180° and 145°, preferably between 180° and 155°. o a first duct (21) provided for guiding said first fluid, wherein, The stationary part (10) has a second outlet (12), wherein the rotatable part (20) has a second duct (22), wherein the second duct (22) is connectable to the second outlet (12) via a second chamber (32), wherein in particular the second chamber (32) is configured between the stationary part (10) and the rotatable part (20) and is arranged for providing a permanent fluid connection between the second duct (22) and the second outlet (12). The rotatable part (20) has: - a pressure duct (23), in particular with a pressure outlet (23.1), which is connectable to the pressure duct (23), wherein the stationary part (10) has: a pressure inlet (13), wherein the pressure duct (23) is connectable to the pressure inlet (13) via a pressure chamber (33), wherein the pressure chamber (33) is arranged for providing a permanent fluid connection between the pressure duct (23) and the pressure inlet (13). The rotatable part (20) has: - a return duct (24), in particular with a return inlet (24.1) which is connectable to the return duct (24), 2. The rotary feedthrough (100) according to claim 1, characterized in that wherein the stationary part (10) has:

3. The rotary feed-through (100) according to claim 1 or 2, characterized in that ​ ​ 4. The rotary feed-through (100) according to any one of the preceding claims, characterized in that ​ 5. The rotary feed-through (100) according to any one of the preceding claims, characterized in that ​ ​ ​ ​ 6. The rotary feed-through (100) according to any one of the preceding claims, characterized in that ​ ​ ​ - a return outlet (14), wherein the return duct (24) is connected to the return outlet (14) via a return chamber (34), wherein the return chamber (34) is provided for providing a permanent fluid connection between the return duct (24) and the return outlet (14).

7. The rotary feed-through (100) according to any one of the preceding claims, characterized in that A leakage chamber (35) is provided, which is arranged between the stationary part (10) and the rotatable part (20), wherein the rotatable part (20) has a leakage duct (14.1) which connects the leakage chamber (35) with the return chamber (34) in order to lead away leakage, in particular from the pressure chamber (33) and / or the first chamber (31), via the leakage duct (14.1) into the leakage chamber (35).

8. The rotary feedthrough (100) according to any one of the preceding claims, characterized in that The first operating position (I) is provided for a forward movement of the vehicle (200) and the second operating position (II) is provided for a rearward movement of the vehicle (200) and / or The at least one blocking position is between the first operating position (I) and the second operating position (II).

9. Rotating run-through (100) according to one of the preceding claims, characterized in that The stationary part (10) has: - a first deflection outlet (15) and - a second deflection outlet (16), wherein the rotatable part (20) has, in particular for guiding the second fluid: - a first deflection duct (25), which is connected to the first deflection outlet (15) in the first operating position (I) and to the second deflection outlet (16) in the second operating position (II), in particular via a first deflection connection piece (25.2), - a second deflection duct (26), which is connected to the second deflection outlet (16) in the first operating position (I) and to the first deflection outlet (15) in the second operating position (II), in particular via a second deflection connection piece (26.2).

10. The rotary feedthrough (100) according to the preceding claim, characterized in that The rotatable part (20), in particular its outer contour, is designed in steps perpendicular to the rotation axis (V), in particular in a stepped cylindrical shape.

11. The rotary thread (100) according to any one of the preceding claims, characterized in that At least one seal for sealing the first chamber (31) is provided, which circumferentially surrounds the rotatable part (20), wherein in particular different chambers (31, 32, 33, 34, 35) are separated from one another by at least one seal.

12. The rotary feedthrough (100) according to any one of the preceding claims, characterized in that The first fluid and the second fluid are separated from one another along the rotation axis (V) by at least one chamber (34, 35), in particular the return chamber (34) and / or the leakage chamber (35).

13. The rotary feedthrough (100) according to any one of the preceding claims, characterized in that The rotary feedthrough (100), in particular the fixed part (10) and / or the rotatable part (20), has at least one bearing (40), in particular a rolling bearing, wherein at least one bearing body (41), in particular a rolling body of the rolling bearing, is arranged between the fixed part (10) and the rotatable part (20) in order to make possible a rotatable bearing of the rotatable part (20) about the rotary axis (V).

14. The rotary feedthrough (100) according to the preceding claim, characterized in that The bearing (40), in particular the rolling bearing, is designed to lock movement along the rotary axis (V) between the fixed part (10) and the rotatable part (20).

15. Vehicle (200) comprising a rotary feedthrough (100) according to any one of the preceding claims.

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