Power supply connection for a wheel steering device, wheel steering device for a chassis and chassis

Description

[0001] The invention relates to a supply connection for a wheel steering device for a chassis for a rail vehicle, which has at least a first supply line, at least a first connecting part, a feed part and a supply connection longitudinal axis, wherein the at least first supply line is guided in the feed part and can be connected to a supply unit and to a first fluid chamber of a first elastic element for wheel angle positioning.

[0002] Running gear for rail vehicles must exhibit a high level of driving safety. This can be improved, for example, by the installation of a wheel or wheelset steering device. The targeted positioning of wheels or wheelsets by actively rotating them around their vertical axes is a known method for preventing unstable driving conditions.

[0003] Furthermore, this results in increased ride comfort by avoiding disruptive vibrations in a rail vehicle.

[0004] Furthermore, a wheel or wheelset steering device enables a reduction in wear on wheels and rails.

[0005] Wheel or wheelset steering devices often feature active elastic bearings, which are designed, for example, as hydraulic bushings.

[0006] For example, EP 0 870 664 B1 discloses a method and device for guiding the wheelset of railway vehicles. Among other things, it shows a device in which the angle of rotation of wheelsets is generated by a two-chamber fluid bushing. A swing arm connects a wheelset to a chassis frame. The fluid bushing is arranged between the swing arm and the chassis frame. Its fluid chambers are alternately supplied with fluid via corresponding connections, thereby generating a relative movement between the swing arm and the chassis frame.

[0007] German patent application DE 10 2014 214055 A1 discloses a chassis of a rail vehicle with triangular control arms for wheelset guidance. At least one bearing of the triangular control arm has a hydraulic bushing with variable longitudinal stiffness. The hydraulic bushing has an elastomeric element with fluid chambers, which are connected to each other by an internal fluid channel that is guided through an elastomeric material of the elastomeric element. The elastomeric element is arranged to encase a bearing pin of the bearing.

[0008] EP 1 457 706 B1 discloses a hydraulic bushing arranged in an axle link of a railway vehicle's bogie. The hydraulic bushing has at least two fluid chambers filled with hydraulic fluid, which are connected to each other via an overflow channel to ensure fail-safe operation. The overflow channel is designed as a passive vibration damper.

[0009] Furthermore, WO 2018 / 095961 A1 describes a wheel steering arrangement for the bogie of a rail vehicle, in which an elastic bearing, which has two fluid chambers and provides the steering angle of a wheelset, is connected to a hydraulic supply. The hydraulic supply has a closed hydraulic circuit.

[0010] The aforementioned approaches, in their known forms, have the disadvantage that no constructive details of the supply connections of the fluid chambers are apparent, i.e., it is not shown, for example, how supply connections are integrated into their structural environment.

[0011] The invention is based on the objective of providing a structurally integrable supply connection that is more advanced than the prior art and can also be used with a limited installation space budget.

[0012] According to the invention, this problem is solved with a supply connection according to claim 1.

[0013] The supply connection according to the invention is therefore compact and robust. It can be connected, for example, fluidically to a supply unit and a first fluid chamber, or to a wheel steering component or a chassis component (e.g., a swing arm of a wheelset guide device, a wheelset bearing housing, or a chassis frame, etc.). Therefore, the supply connection according to the invention fulfills both fluidic (e.g., hydraulic) functions and connection-related structural functions.

[0014] Because the first supply line is routed through the feed section, it is shielded from environmental influences.

[0015] The first connecting piece is T-shaped, with its legs acting as defined mounting areas. This allows for easy and safe assembly and disassembly of the first connecting piece.

[0016] Further advantageous embodiments of the supply connection according to the invention are set out in the dependent claims.

[0017] It is advantageous, for example, if a first line section of the at least first supply line is guided in the at least first connecting part and a second line section of the at least first supply line is guided in the feed part, wherein the first line section and the second line section are preferably arranged at an angle to each other.

[0018] In this context, it is particularly advantageous if the first line section and the second line section are arranged at right angles to each other.

[0019] This measure enables an inlet into the first supply line arranged at a right angle to the second line section. Depending on the structural environment of the supply connection according to the invention, this allows for efficient use of the available installation space.

[0020] The feed section can be short in the direction of the supply connection longitudinal axis, or an extension of the feed section in the direction of the supply connection longitudinal axis can be avoided by the first connecting part.

[0021] A preferred solution is achieved if a first coupling part of a fluidic first locking coupling is arranged in the feed part, by means of which the at least first supply line can be disconnected.

[0022] This measure enables rapid connection and disconnection of the supply section (e.g., to or from a power supply unit). A mechanically and fluidically secure connection is achieved. Unintentional disconnection of the supply section is prevented. The connection is leak-proof, preventing unintentional fluid leakage, for example, at a separation joint of the supply section. If, for instance, valves are provided in the first coupling, a defined pressure level can be maintained in the supply section even after the first supply line is disconnected.

[0023] The first locking coupling is located in the feed section, thus protecting it from environmental influences (e.g., from the ingress of moisture, particles, etc.).

[0024] An advantageous design is obtained if the feed part is rounded and flattened at least in the area of ​​a first connecting surface to the at least first connecting part.

[0025] This measure allows the feeder part to be designed, for example, as a bolt in a socket-bolt connection and still have a flat contact surface to the first connecting part.

[0026] It can also be helpful if a first connecting piece is connected to at least the first connecting part and to at least the first supply line which is guided in at least the first connecting part.

[0027] This measure allows for easy connection and disconnection of the first supply line, for example, to or from a power supply unit. The first connector also makes it possible to connect valves to the first supply line (for example, by incorporating a valve into the first connector).

[0028] A compact structural solution with two connecting parts can still be achieved if a second connecting part is connected to the feed part, wherein the at least first connecting part is arranged at a first end of the feed part and the second connecting part is arranged at a second end of the feed part.

[0029] In this context, it is advantageous if a second supply line, connectable to a supply unit and a second fluid chamber of a second elastic element for wheel angle positioning, is guided in the second connecting part and in the feed part, wherein the at least first supply line and the second supply line are arranged partially parallel to each other.

[0030] This measure enables the supply of fluid to a two-chamber elastic bearing.

[0031] A suitable application for the supply connection according to the invention is provided by a wheel steering device according to the invention for a chassis for a rail vehicle, which has at least a first swing arm as a first wheel steering component, at least a first guide bushing as a second wheel steering component and an elastic-fluidic device for wheel angle positioning, with at least one supply connection according to the invention connected to the elastic-fluidic device.

[0032] In connection with the wheel steering device according to the invention, it is structurally advantageous if the at least first guide bushing and the at least one supply connection are connected to each other via cylindrical contact surfaces of the at least first guide bushing and the at least one supply connection, wherein the at least one supply connection is at least partially inserted into the at least first guide bushing, so that the at least first guide bushing and the at least one supply connection have a common longitudinal axis, and wherein the at least one supply connection is connected to the at least first swing arm.

[0033] This measure ensures that an inlet to the first supply line of the supply connection according to the invention can be arranged, for example, above or below a connection of the supply connection according to the invention with the first swing arm.

[0034] The supply connection according to the invention has a fluidic supply function for the wheel steering device according to the invention and also functions as a structural component for the wheel steering device according to the invention. Assembly and disassembly of the supply connection according to the invention are simple and quick.

[0035] A simple loosening or securing of the connection between the supply connection according to the invention and the first swing arm is made possible if the at least one supply connection is screwed to the at least first swing arm.

[0036] An increase in driving safety and driving comfort of a rail vehicle can be achieved with a chassis for a rail vehicle with at least one wheel steering device according to the invention.

[0037] A steering angle position of the wheel or wheelset by means of the wheel steering device according to the invention is made possible if a first wheelset is coupled to a chassis frame in a steerable manner via the at least one wheel steering device.

[0038] The invention will now be explained in more detail using exemplary embodiments.

[0039] They show, for example: Fig. 1: A schematic elevation of a section from an exemplary first embodiment of a fluidic wheel steering device according to the invention, comprising a first swing arm, a first guide bushing, and an exemplary first embodiment of a supply connection according to the invention. Fig. 2: A schematic side view in sectional view of an exemplary second embodiment of a fluidic wheel steering device according to the invention, comprising a first swing arm, a first guide bushing, and an exemplary second embodiment of a supply connection according to the invention. Fig. 3: A schematic elevation of a section from an exemplary embodiment of a chassis according to the invention, comprising an exemplary third embodiment of a wheel steering device according to the invention and an exemplary third embodiment of a supply connection according to the invention.

[0040] Fig. 1 shows a schematic elevation of a section of an exemplary first embodiment of a fluidic wheel steering device according to the invention, comprising a first swing arm 1 as the first wheel steering component, a first guide bushing 2 as the second wheel steering component, and an exemplary first embodiment of a supply connection according to the invention.

[0041] The first swing arm 1 is connected to a first wheelset 3 of a chassis, as exemplified in Fig. 3 The first guide bushing 2 is pressed into a chassis frame 4 of the chassis and functions as a wheelset guide bushing.

[0042] The supply connection is connected to the first swing arm 1 and inserted into the first guide bushing 2, making contact with it.

[0043] The wheel steering device further comprises an elastic-fluidic device for wheel angle positioning, which includes a first elastic element 5 and a second elastic element 6.

[0044] A first interior space of the first elastic element 5 is designed as the first fluid chamber 7, and a second interior space of the second elastic element 6 as the second fluid chamber 8. The first elastic element 5 and the second elastic element 6 are arranged in recesses of the supply connection and border the first guide bushing 2. By varying the fluid pressures in the first fluid chamber 7 and the second fluid chamber 8, variable forces are generated between the first guide bushing 2 and the supply connection. These forces are then transmitted from the supply connection via the first swing arm 1 as steering forces to the first wheelset 3 for adjusting the steering angles.

[0045] The supply connection, which supplies the first fluid chamber 7 and the second fluid chamber 8 with a hydraulic fluid for varying the fluid pressures, comprises a first connecting part 9 and a second connecting part 10, as shown by way of example in Fig. 2 shown, as well as a feed part 11. The feed part 11 has a first adapter 12, a second adapter 13, as shown by way of example in Fig. 2 The figure shows a central piece 14. The feed part 11 is rounded. The first adapter 12 and the second adapter 13 are semi-cylindrical and screwed to the central piece 14. According to the invention, however, it is also conceivable that the feed part 11 is formed in one piece.

[0046] The first adapter 12 is inserted into a partially semi-cylindrical first recess 15 of the first swing arm 1, the second adapter 13 into a partially semi-cylindrical recess in Fig. 1 non-visible second recess of the first swing arm 1.

[0047] The hollow cylindrical first guide bushing 2 and the cylindrical center piece 14 are connected to each other via cylindrical contact surfaces of the first guide bushing 2, the center piece 14, the first elastic element 5 and the second elastic element 6, wherein the feed part 11 is inserted into the first guide bushing 2, such that the first guide bushing 2 and the supply connection form a Fig. 1 The projecting supply connection longitudinal axis 16 has a common longitudinal axis.

[0048] The first connecting part 9 is T-shaped and has a first leg 17 and a second leg 18. The first leg 17 is aligned parallel to a vertical axis 19 of the first guide bushing 2, the second leg 18 parallel to a transverse axis 20 of the first guide bushing 2.

[0049] The first connecting part 9 is detachably connected to the first adapter 12 of the feed part 11 via the first leg 17 by means of a fluidic first locking coupling 21, which is designed as a quick-release coupling.

[0050] The first locking coupling 21 is arranged in the first connecting part 9 and in the feed part 11. The first adapter 12 is flattened in the area of ​​a first connecting surface 23 to the first connecting part 9 and is therefore flat in this area.

[0051] On the second leg 18, a first contact surface 25 and a second contact surface 26 are arranged, via which the first connecting part 9 is screwed to the first swing arm 1 by means of a first screw 27 and a second screw 28, i.e. detachably connected.

[0052] The first screw 27 and the second screw 28 are designed as blind hole hexagon screws.

[0053] The second connecting part 10 and the second adapter 13 are structurally, functionally and in terms of connection technology identical to the first connecting part 9 and the first adapter 12.

[0054] The supply connection has a first supply line 30 and a second supply line 31, which are connected to a supply unit 32 of the wheel steering device, as exemplified in Fig. 3 As shown, they are connected and separately supply the first fluid chamber 7 and the second fluid chamber 8 with the hydraulic fluid.

[0055] The first supply line 30 is guided in the first connecting part 9 and in the feed part 11 and can be disconnected by means of the first locking coupling 21. A first connecting piece 33 is arranged on the first connecting part 9 and is connected to the first supply line 30; a first supply section 35 of the first supply line 30 leads from the first connecting piece 33 to the supply unit 32.

[0056] The second supply line 31 is guided in the second connecting part 10 and in the feeder part 11 and is structurally, functionally, and technically identical to the first supply line 30. The second supply line 31 is connected via a second connecting piece 34, as exemplified in Fig. 2 visible, connected to the power supply unit 32.

[0057] The first supply line 30 is connected to the first fluid chamber 7 via a first supply section 36 of the first supply line 30, the second supply line 31 is connected to the second fluid chamber 8 via a second supply section 37 of the second supply line 31.

[0058] According to the invention, it is also conceivable that the first supply line 30 is angled in the first connecting part 9 and leads out of the second leg 18 of the first connecting part 9 parallel to the transverse axis 20, wherein the first connecting piece 33 is not arranged on the first connecting part 9, but is connected to the first connecting part 9 laterally. Furthermore, it is conceivable that the first supply line 30 is not guided in the first connecting part 9, but extends into the first swing arm 1 and is connected to the supply unit 32 via the first swing arm 1 (e.g., laterally or via an underside), wherein the first locking coupling 21 is arranged in the feed part 11 and in the first swing arm 1.

[0059] In Fig. 2 Figure 1 is a sectional view of a schematic side view of an exemplary second embodiment of a fluidic wheel steering device according to the invention, comprising a first swing arm 1, a first guide bushing 2, and an exemplary second embodiment of a supply connection according to the invention. The exemplary second embodiment of a wheel steering device according to the invention is structurally and functionally identical to that shown in Figure 2. Fig. 1 disclosed an exemplary first embodiment of a wheel steering device according to the invention.

[0060] The exemplary second embodiment of a supply connection according to the invention is structurally and functionally identical to that in Fig. 1 disclosed an exemplary first embodiment of a supply connection according to the invention.

[0061] A feed section 11 of the supply connection comprises a first adapter 12, a second adapter 13, and a center piece 14. The center piece 14 is inserted into the first guide bushing 2, while the first adapter 12 and the second adapter 13 are arranged outside the first guide bushing 2. The first guide bushing 2 and the feed section 11 share a supply connection longitudinal axis 16 as a common longitudinal axis. The feed section 11 functions as a bolt in a bushing-bolt connection.

[0062] The first adapter 12 is screwed to the middle piece 14 at the first end 38 of the feed part 11 or the supply connection with respect to the supply connection longitudinal axis 16, the second adapter 13 is screwed to the second end 39 of the feed part 11 or the supply connection with respect to the supply connection longitudinal axis 16.

[0063] A first connecting part 9 of the supply connection is connected at the first end 38 via a flat first connecting surface 23 to the first adapter 12, a second connecting part 10 of the supply connection is connected at the second end 39 via a flat second connecting surface 24 to the second adapter 13.

[0064] The first connecting part 9 is, as in connection with Fig. 1 as described by way of example, by means of a first screw 27 and an exemplary in Fig. 1 the second screw 28 shown is connected to the first swing arm 1.

[0065] The second connecting part 10 is screwed to the first swing arm 1 in the same way as the first connecting part 9. A third screw 29 and a [missing information] are located between the second connecting part 10 and the first swing arm 1. Fig. 2 A fourth screw is positioned, but it is not visible.

[0066] The first swing arm 1 is fork-shaped in the area of ​​the first guide bushing 2 and encompasses the first guide bushing 2 and the feed part 11 in the area of ​​the first end 38 or in the area of ​​the first connecting part 9 as well as in the area of ​​the second end 39 or in the area of ​​the second connecting part 10.

[0067] The first adapter 12 and the second adapter 13 are arranged above the first swing arm 1, the first connecting part 9 above the first adapter 12 and the second connecting part 10 above the second adapter 13.

[0068] In the first connecting part 9 and the feeder part 11, a first supply line 30 is routed, and in the second connecting part 10 and the feeder part 11, a second supply line 31 is routed.

[0069] On the first connecting part 9, a first connecting piece 33 of the supply connection is arranged, which is connected to the first connecting part 9 and to the first supply line 30; on the second connecting part 10, a second connecting piece 34 of the supply connection is arranged, which is connected to the second connecting part 10 and to the second supply line 31.

[0070] The first supply line 30 is connected via the first connecting piece 33, which is connected to the first connecting piece 9, and the second supply line 31 is connected via the second connecting piece 34, which is connected to the second connecting piece 10, with hydraulic fluid from a supply unit 32, which is connected to the first supply line 30 and to the second supply line 31, as is shown for example in Fig. 3 It is shown that it is supplied.

[0071] The first supply line 30 includes an exemplary one in Fig. 1 The first supply section 35, a first line section 40, a second line section 41, and a first feed section 36, which are interconnected, are shown. The second supply line 31 has a Fig. 2 a second supply section not shown, a third line section 42, a fourth line section 43, and an example in Fig. 1 The second feed section 37 shown, which are connected to each other.

[0072] The first supply section 35 connects the first line section 40 to the supply unit 32. The first connection piece 33 is connected to the first supply section 35 and to the first line section 40.

[0073] The first line section 40, which connects to the first supply section 35 via the first connection piece 33, is guided in the first connecting part 9 and extends into the first adapter 12. The second line section 41 is guided in the first adapter 12 and in the center piece 14, connecting to the first line section 40. The second line section 41 is connected via the first feed section 36, which connects to the second line section 41, with an exemplary configuration shown in Fig. 1 connected to the first fluid chamber 7 of the wheel steering device shown.

[0074] The first conductor section 40 and the second conductor section 41 are arranged at an angle to each other. The first conductor section 40 is aligned parallel to a vertical axis 19 of the first guide bushing 2, the second conductor section 41 parallel to the longitudinal axis 16 of the supply connection. The first conductor section 40 is thus arranged at right angles to the second conductor section 41.

[0075] The first feed section 36 is parallel to a Fig. 2 The projecting transverse axis 20 of the first guide bushing 2 is aligned and also appears in Fig. 2 projecting.

[0076] In the first connecting part 9 and in the first adapter 12 a first locking coupling 21 is arranged, which has a first coupling part 44 and a second coupling part 45 designed as a plug nipple.

[0077] The first locking coupling 21 is a quick-release coupling, which is designed as a mono coupling or through coupling.

[0078] The first coupling part 44 is arranged in the first adapter 12, the second coupling part 45 in the first connecting part 9.

[0079] However, according to the invention it is also conceivable that the first coupling part 44 is designed as a plug nipple, i.e. that the first locking coupling 21 is arranged rotated by 180° in the first connecting part 9 and in the first adapter 12.

[0080] The second coupling part 45 is arranged in the first line section 40 and projects into the first adapter 12 via a flange-like section which contacts the first connecting part 9 in the area of ​​the first connecting surface 23. The second coupling part 45 is screwed to an internal thread of the first connecting part 9 via a threaded section of the second coupling part 45.

[0081] The first coupling part 44 is mounted in a receptacle of the first line section 40 in the first adapter 12.

[0082] The first connecting part 9, together with the second coupling part 45, can be separated from the first adapter 12 and the first coupling part 44. The first locking coupling 21 functions as a plug connector. When the first coupling part 44 and the second coupling part 45 are joined together via a retaining ring, the first locking coupling 21 and the first supply line 30 are sealed against the hydraulic fluid flowing through the first supply line 30, due to the seals of the first locking coupling 21 and the connecting forces of the first screw 27 and the second screw 28.

[0083] The third line section 42 is connected to the supply unit 32 via the second supply section.

[0084] The third line section 42, which connects to the second supply section via the second connector 34, is guided in the second connecting part 10 and extends into the second adapter 13. The fourth line section 43 is guided in the second adapter 13 and in the center section 14, connecting to the third line section 42. The fourth line section 43 is connected to the fourth line section 43 via the second feed section 37, which connects to the fourth line section 43. Fig. 1 connected to the second fluid chamber 8 of the wheel steering device shown.

[0085] The third line section 42 and the fourth line section 43 are arranged at an angle to each other. The third line section 42 is aligned parallel to the vertical axis 19, the fourth line section 43 parallel to the longitudinal axis 16 of the supply connection. The third line section 42 is thus arranged at right angles to the fourth line section 43.

[0086] The second feed section 37 is aligned parallel to the transverse axis 20.

[0087] The second line section 41 and the fourth line section 43 are arranged parallel to each other or coaxially and are structurally separated from each other by the middle piece 14.

[0088] A second locking coupling 22 is arranged in the second connecting part 10 and in the second adapter 13, or in the third line section 42. The second locking coupling 22 is structurally, functionally, and technically identical to the first locking coupling 21.

[0089] Fig. 3 discloses a schematic elevation of a section of an exemplary embodiment of a chassis according to the invention, with an exemplary third embodiment of a wheel steering device according to the invention and an exemplary third embodiment of a supply connection according to the invention.

[0090] The chassis is designed as the chassis of a rail vehicle.

[0091] The exemplary third embodiment of a wheel steering device according to the invention corresponds structurally and functionally to that exemplary first embodiment of a wheel steering device according to the invention, which was described in connection with Fig. 1 is described.

[0092] The exemplary third embodiment of a supply connection according to the invention is structurally, functionally, and in terms of connection technology identical to the exemplary first embodiment of a supply connection according to the invention, which is described in Fig. 1 shown.

[0093] The chassis has a chassis frame 4, which is coupled to a first wheelset 3 via the wheel steering device.

[0094] The wheel steering device comprises a first swing arm 1 as the first wheel steering component and a first guide bushing 2 as the second wheel steering component, which are arranged on a first side of the chassis, as well as a second swing arm as the third wheel steering component and a second guide bushing as the fourth wheel steering component, which, in Fig. 3 not visible, are located on a second side of the chassis. The first wheel steering component, the second wheel steering component, the third wheel steering component and the fourth wheel steering component are also chassis components, such as the chassis frame 4.

[0095] With the first wheelset 3, a [missing word] is [missing word] on the first side of the chassis. Fig. 3 A non-visible wheelset bearing is connected, which in turn is coupled to a wheelset bearing housing 46. The wheelset bearing housing 46 is connected to the first swing arm 1, and the first swing arm 1 is connected to the supply connection, which acts as a bolt and is inserted into the first guide bushing 2. A primary spring 47 is arranged between the wheelset bearing housing 46 and the chassis frame 4. According to the invention, the wheelset bearing housing 46 and the first swing arm 1 can also be formed in one piece.

[0096] The first guide bushing 2 is pressed into the chassis frame 4. However, according to the invention, it is also conceivable that the first guide bushing 2 is, for example, a recess in the chassis frame 4, i.e., that the first guide bushing 2 and the chassis frame 4 are not separate components.

[0097] The first wheelset 3 is coupled to the chassis frame 4 on the second side of the chassis according to the same principle as on the first side of the chassis.

[0098] The supply connection has a first connecting part 9, a second connecting part 10, as shown for example in Fig. 2 as shown, and a feed part 11. The supply connection is inserted into the first guide bushing 2 via the feed part 11. The T-shaped first connecting part 9, arranged outside the first guide bushing 2, is screwed to the first swing arm 1 and connected via a first locking coupling 21, as exemplified in Fig. 1 shown, connected to the feed part 11.

[0099] The first connecting part 9 is arranged on the front of a swing arm. The second connecting part 10 is structurally, functionally, and technically identical to the first connecting part 9 and is arranged on the rear of a swing arm.

[0100] A supply unit 32, designed as a hydraulic unit, is connected to the chassis frame 4 and includes a pump, an electric pump motor, and a tank for hydraulic fluid. The hydraulic fluid is fed from the supply unit 32 via a first supply line 30, through a first connection piece 33, into the first connecting part 9 and into the feed part 11.

[0101] Via a second supply line 31, as exemplified in Fig. 2 As shown, the hydraulic fluid is supplied from the power unit 32 via a second connection piece 34, as exemplified in Fig. 2 The first supply line 30 is connected to a first fluid chamber 7 of a first elastic element 5 of the wheel steering device, as exemplified in Fig. 1 The second supply line 31 is connected to a second fluid chamber 8 of a second elastic element 6, as shown in the example in Fig. 1 shown.

[0102] The first supply line 30 supplies the first fluid chamber 7 with the hydraulic fluid from the supply unit 32, the second supply line 31 the second fluid chamber 8.

[0103] By changing the hydraulic pressure conditions in the first fluid chamber 7 and the second fluid chamber 8, the stiffnesses of the first elastic element 5 and the second elastic element 6 are varied, and steering forces can be generated and adjusted on the first swing arm 1. Thus, the first wheelset 3 is steerable via the wheel steering device and coupled to the chassis frame 4.

[0104] According to the invention, it is also possible that the first guide bushing 2 with the supply connection is not arranged in the chassis frame 4, but in the first swing arm 1, and that the first connecting part 9 is not connected to the first swing arm 1, but to the chassis frame 4.

[0105] The chassis features a Fig. 3 a second wheelset (not shown) which is steerably connected to the chassis frame 4 according to the same principle as the first wheelset 3. List of designations

[0106] 1 First swing arm 2 First guide bushing 3 First wheel set 4 Chassis frame 5 First elastic element 6 Second elastic element 7 First fluid chamber 8 Second fluid chamber 9 First connecting piece 10 Second connecting piece 11 Feeder piece 12 First adapter 13 Second adapter 14 Center piece 15 First recess 16 Supply connection - longitudinal axis 17 First leg 18 Second leg 19 Vertical axis 20 Transverse axis 21 First locking coupling 22 Second locking coupling 23 First connecting surface 24 Second connecting surface 25 First contact surface 26 Second contact surface 27 First screw 28 Second screw 29 Third screw 30 First supply line 31 Second supply line 32 Supply unit 33 First connector 34 Second connector 35 First supply section 36 First feed section 37 Second feed section 38 First end 39 Second end 40 First line section 41 Second line section 42 Third line section 43 Fourth line section 44 First coupling part 45 Second coupling part46 Wheelset bearing housing 47 Primary spring

Claims

1. Supply connection for a wheel steering device for a chassis for a rail vehicle, which supply connection has at least one first supply line (30), at least one first connecting part (9), a feed part (11) and a supply connection longitudinal axis (16), wherein the at least first supply line (30) is fed in the feed part (11) and can be connected to a supply unit (32) and to a first fluid chamber (7) of a first elastic element (5) for wheel angle positioning, wherein the at least first connecting part (9) is embodied in a T shape, is connected to the feed part (11) by way of a first limb (17) of the at least first connecting part (9), and on a second limb (18) of the at least first connecting part (9) has at least one first contact surface (25) for connecting the at least first connecting part (9) to a wheel steering component or a chassis component.

2. Supply connection according to claim 1, characterised in that a first line section (40) of the at least first supply line (30) is fed in the at least first connecting part (9) and a second line section (41) of the at least first supply line (30) is fed in the supply part (11), wherein the first line section (40) and the second line section (41) are preferably arranged at an angle to one another.

3. Supply connection according to claim 2, characterised in that the first line section (40) and the second line section (41) are arranged at a right angle to one another.

4. Supply connection according to claim 2 or 3, characterised in that the second line section (41) is aligned parallel to the supply connection longitudinal axis (16).

5. Supply connection according to one of claims 1 to 4, characterised in that a first coupling part (44) of a fluidic first locking coupling (21) is arranged in the feed part (11), by means of which the at least first supply line (30) can be separated.

6. Supply connection according to claim 5, characterised in that a second coupling part (45) of the first locking coupling (21) is arranged in the at least first connecting part (9) in which the at least first supply line (30) is fed.

7. Supply connection according to claim 5 or 6, characterised in that the first coupling part (44) or the second coupling part (45) is embodied as a plug nipple.

8. Supply connection according to one of claims 1 to 7, characterised in that the feed part (11) is designed to be rounded and flattened in respect of the at least first connecting part (9) at least in the region of a first connecting surface (23).

9. Supply connection according to one of claims 1 to 8, characterised in that a first connection piece (33) is connected to the at least first connecting part (9) and to the at least first supply line (30) which is fed in the at least first connecting part (9).

10. Supply connection according to one of claims 1 to 9, characterised in that a second connecting part (10) is connected to the feed part (11), wherein the at least first connecting part (9) is arranged on a first end (38) of the feed part (11) and the second connecting part (10) is arranged on a second end (39) of the feed part (11).

11. Supply connection according to claim 10, characterised in that a second supply line (31), connectable with a supply unit (32) and a second fluid chamber (8) of a second elastic element (6) for wheel angle positioning, is fed in the second connecting part (10) and in the feed part (11), wherein the at least first supply line (30) and the second supply line (31) are arranged partially parallel to one another.

12. Wheel steering device for a chassis for a rail vehicle, which has at least one first swivel arm (1) as a first wheel steering component, at least one first guide bush (2) as a second wheel steering component and an elastic-fluidic facility for wheel angle positioning, with at least one supply connection, connected to the elastic-fluidic facility, according to one of claims 1 to 11.

13. Wheel steering device according to claim 12, characterised in that the at least first guide bush (2) and the at least one supply connection are connected to one another via cylindrical contact surfaces of the at least first guide bush (2) and the at least one supply connection, wherein the at least one supply connection is introduced at least partially into the at least first guide bush (2) so that the at least first guide bush (2) and the at least one supply connection have a shared longitudinal axis, and wherein the at least one supply connection is connected to the at least first swivel arm (1).

14. Wheel steering device according to claim 13, characterised in that the at least one supply connection is screwed to the at least first swivel arm (1).

15. Chassis for a rail vehicle with at least one wheel steering device according to one of claims 12 to 14.

16. Chassis according to claim 15, characterised in that a first wheel set (3) is coupled, so as to be steerable, to a chassis frame (4) by way of the at least one wheel steering device.