EP2557016B1 - Wheel mount linkage for a rail vehicle - Google Patents

Description

The invention relates to a Radträgeranlenkung for a rail vehicle with a bogie frame, comprising a wheel set comprising at least one wheel and the wheel holding wheel carrier, wherein the wheel carrier is provided on the one hand with a rocker which is pivotally connected via a bolt connection to the bogie frame, and another is connected via a spring element resiliently connected to the bogie frame, wherein the bolt connection comprises a bolt with a bolt shank, which is guided by a receptacle in the rocker and at least one receptacle in the bogie frame, wherein the bolt connection is play and the direction of action of the spring element obliquely to the horizontal and vertical runs, such that in the pressurized state of the spring element, the wheel carrier is pushed together with the rocker from the bogie frame. Furthermore, the invention relates to a rail vehicle with such Radträgeranlenkung. A corresponding Radträgeranlenkung and a corresponding rail vehicle are known for example from the FR 1 253 350 A ,

The Radträgeranlenkung, also called Radsatzanlenkung, a rail vehicle is used to connect the wheels of a wheelset with the bogie frame movable and resilient. For this purpose, the wheel held by the wheel carrier is pivotally connected to the bogie frame via a rocker connected to the wheel carrier. At the same time, the wheel on the wheel is also resilient by a so-called primary spring with the bogie frame, that is elastic, connected. The primary spring is usually one Compression spring, the relative movements between the bogie frame and the wheel carrier absorbs, thereby increasing the handling of the rail vehicle and the comfort of the travelers. In addition to a primary spring, a rail vehicle usually also has a so-called secondary spring, which is arranged between the bogie frame and the car body of the rail vehicle and serves for a further increase in comfort.

The rocker is pivotally mounted by means of a transversely extending bolt on the bogie frame. Transverse direction is the horizontal direction transverse to the direction of travel or longitudinal direction, which also runs parallel to the wheel axis. The bolt is mounted in a receptacle in the bogie frame in a press fit, whereby a secure hold of the bolt and ultimately the wheelset holding the swingarm is to be ensured.

The problem, however, is that removal of the bolt for disassembly of the rocker due to a generally relatively small space is almost impossible. The replacement of a rocker, a wheel or a wheelset is very expensive and associated with very hollow costs.

A remedy here can create a play-related bolt connection, as provided in the Radträgeranlenkung mentioned above. However, the play in the bolted connection has the disadvantage that, due to the round cross section of the bolted connection, the bolt can move unintentionally over time, supported by vibrations in the area of the bolted connection. This in turn can lead to a defect of the bolt connection.

From WO 2C10 / 072428 A1 a Radträgeranlenkung is also known with a bolt connection, wherein the bolt has a cross-sectional area in the form of a circle segment. Also, this bolt is not suitable to prevent relative movement within the bolt connection.

Other Radträgeranlenkungen for a rail vehicle, but not solve the previous problem, for example, are known from the DE 25 37 172 A1 and the US 2,197,727 ,

It is therefore an object of the present invention to provide a Radträgeranlenkung for a rail vehicle, which prevents possible a defect of the connection between the rocker and bogie frame.

The previously derived and indicated object is according to a first teaching of the present invention in a Radträgeranlenkung for a rail vehicle with a bogie frame, with a set of wheels containing at least one wheel and the wheel holding the wheel carrier, wherein the wheel carrier is provided on the one hand with a rocker is pivotally connected via a bolt connection to the bogie frame, and on the other hand via a spring element is resiliently connected to the bogie frame, wherein the bolt connection comprises a bolt, for example a metal bolt, with a bolt shank which by a receptacle in the rocker, in particular a receptacle a bushing inserted in the rocker receptacle, for example rubber-metal bushing, and at least one receptacle is guided in the bogie frame, wherein the bolt connection - meant is the connection between the bolt and at least one of the receptacles - has play and the direction of action of the spring element is oblique to the horizontal and vertical, such that in the pressurized state of the spring element of the wheel carrier is pushed together with the rocker from the bogie frame, solved by in a section transverse to the longitudinal axis of the bolt, the bolt shank of the bolt has an outer contour which is not round, and a receptacle for the bolt has an inner contour which is not round, so that the bolt is not readily slid under load respective recording with rotates.

The above-mentioned spring element is, in particular, a compression spring, preferably a compression spring of a primary spring, that is, a suspension between the bogie frame and the wheel carrier.

By the bolt connection, in particular the connection between the bolt and the at least one receptacle in the bogie frame and / or the connection between the bolt and the receptacle in the rocker or, if a socket, for example rubber-metal bushing, inserted in the rocker receptacle is, the connection between the bolt and the receptacle in this socket, afflicted with play, the bolt for disassembling the rocker, when the bolt is unloaded, can easily move out of the or recordings. In this case, the effective direction of the spring element - meaning the direction of the spring travel or the direction in which the spring element springs - chosen so that the spring element under load pushes the wheel and the rocker from the bogie frame, which has the consequence that the rocker accordingly also a bolt of a bolt connection in this direction, that is, the direction away from the bogie frame, loaded. The bolt is thereby pressed despite the game-afflicted connection or storage against the edge of the respective recording and thereby fixed. In the pressurized state of the spring element, which is constantly given in the ready state of the rail vehicle by the vertical load of the car body, the bolt is thus positively inserted into the respective receptacle in the bogie frame and / or in the receptacle in the rocker or the said in the swing seat Socket pressed. If the spring element is relieved by the rail vehicle is jacked example, this also relieves the bolt and can be easily removed according to the invention.

In other words, it is inventively conceivable that in the pressurized state of the spring element of the bolt against the edge of the receptacle, in particular the at least one receptacle in the bogie frame and / or the swing receptacle or socket receptacle, for example, rubber-metal socket receptacle, is pressed in the area in which the bolt touches the receptacle, that is, on the contact side, the bolt connection is free of play, whereas on the side facing away from contact, there is clearance, ie a gap, between bolt and receptacle.

By loosening the bolt, the rocker and possibly the wheel carrier can then also be dismantled without further ado. The rocker may be non-positively or materially connected to the rest of the wheel or be designed in one piece with the rest of the wheel.

According to a further embodiment of the Radträgeranlenkung invention, the bolt connection has a vertical and / or horizontal clearance between the bolt and the receptacle, in particular the at least one receptacle in the bogie frame and / or the swing receptacle or socket receptacle, for example, rubber-metal socket receptacle on. In particular, if both a vertical and a horizontal clearance is present, the bolt can be easily removed when it is not loaded.

It should be noted that according to the invention with the term bolt connection both the connection between the bolt and rocker or in the presence of a jack inserted into the rocker seat, for example rubber-metal bushing, the connection between the bolt and bushing and the connection between bolts and Bogie frame is meant. It is preferred if both the connection between the bolt and bogie frame, that is between the bolt and the corresponding at least one receptacle in the bogie frame, as well as the connection between the bolt and rocker, including in the case of the presence of a socket (for example rubber Metal bushing) in the swing receptacle and the connection between the bolt and socket receptacle (for example, rubber-metal socket receptacle) is understood, is subject to play, in particular the bolt in the pressurized state of the spring element against the at least one receptacle in the bogie frame and against the recording in the rocker, in the presence of said socket (for example, rubber-metal socket) so against the inclusion in said socket, is pressed and in the unloaded state by the existing game and the lifted positive engagement can be removed from said receptacle.

According to yet another embodiment of Radträgeranlenkung invention the bolt extends in the horizontal, ie in a longitudinal direction (direction of travel) extending plane. In particular, the bolt extends parallel to the axis of rotation of the at least one wheel, which axis of rotation also extends in the horizontal. A bolt extending in this way can be loaded particularly effectively by pressurizing the spring element by the rocker pushed away from the bogie frame and thus brought into positive engagement within the respective receptacle in the bogie frame and / or in the rocker or in the bush, for example rubber-metal bushing become.

In the Radträgeranlenkung invention, the bolt, in a section transverse to the longitudinal axis of the bolt, an irregularly extending outer contour. In addition, it is provided that the receptacle, in particular the at least one receptacle in the bogie frame and / or the inclusion in the rocker, or in the presence of such, in the socket, for example rubber-metal bush, in a section transverse to the longitudinal axis of Bolzens, having an uneven inner contour. Uneven running in the sense of the present invention means that the respective contour does not have the same distance from the bolt longitudinal axis at every point, that is, the contour is not round. Such an outer and inner contour has the advantage that the bolt under load, especially under the action of a transmitted from the rocker torque, not readily rotates in the respective recording. A rotary movement of the bolt relative to the inner surface of the respective receptacle would on the one hand lead to wear of recording and / or bolts and on the other hand also bear the risk of unwanted sideways or axial movement of the bolt. The outer contour and / or inner contour preferably has at least one corner, preferably three or more corners. A bolt, which has an outer contour with, for example, four corners in cross-section to the longitudinal axis of the bolt, is a square bolt. In principle, however, bolts with even more corners in the outer contour are conceivable. In addition, the bolt head of the bolt may have a polygonal cross-section with the aforementioned number of corners, with respect to a section transverse to the longitudinal axis of the bolt.

According to a further embodiment of Radträgeranlenkung invention, the bolt is a hollow bolt. The hollow bolt is formed in particular by an axial bore extending at least through the bolt shank and possibly through the bolt head. Such a hollow bolt has a relatively low weight and can be fixed in the axial direction with simple means, for example, by a screw is guided through the bore.

According to another embodiment of the Radträgeranlenkung invention is provided that in the recording in the rocker, as already indicated above, a rubber-metal bushing play and rotationally fixed, in particular in a press fit, is inserted, wherein in the rubber-metal Bush, that is, in the receptacle of the inner sleeve member, so the Buchsenauge, the bolt is inserted. Preferably, the bolt is in the said receptacle of the rubber-metal bushing or the inner sleeve member such as said also used with play, so that this interacts in the pressurized state of the spring element on the contact side backlash-free and form-fitting with the receptacle and is play on the side facing away from the contact of the bolt connection. For the purposes of the invention, a rubber-metal bushing is understood to mean a component which consists of two nested cylinders, in particular metal cylinders, wherein a gap existing between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the outer cylinder is secured with a resilient plastic sleeve. or rubber compound is filled. The elastic mass is firmly connected to the surface of the inner and outer cylinder, so that forces and moments can be transmitted from both the outer cylinder and the inner cylinder to the elastic mass.

Such a rubber-metal bush has the advantage that the pivoting movements of the rocker are not or at least not completely transferred to the bolt. The bolt is thus even better protected against wear and unintended axial movements. In the pressurized state of the spring element but the necessary force is still exerted on the bolt in the direction of the contact surface of the respective recording, so that it sits positively in the respective recording. If the spring element and thus the rocker is unloaded, no load acts on the connection between the bolt and the rubber-metal bush, so that the bolt also from the corresponding receptacle in the rubber-metal bush, the bushing eye or the receptacle in the inner bushing element , can be moved out.

It should be noted at this point that, when in the description of the invention it is mentioned that the bolt is guided by a receptacle in the rocker, it may also be meant that the bolt in the presence of a jack inserted into the rocker seat, for Example rubber-metal socket, also guided by the inclusion in this socket. For if the bolt is guided by a receptacle in said socket inserted into the rocker, this bolt is inevitably led by the inclusion in the rocker.

According to yet another embodiment of Radträgeranlenkung invention is provided that the at least one receptacle in the bogie frame of a receiving socket, for example, a metal bushing is formed, the play and rotationally fixed, in particular in a press fit, is connected to the rest of the bogie frame. In particular, this receiving bush is shrunk into the recess provided for this purpose. The receiving socket thus forms part of the bogie frame which receives the bolt. In this way, an ideal material pairing can be selected in the contact area between the bolt and the receptacle. In the pressurized state of the spring element, the bolt is then pressed against the inner surface of the receiving socket, whereby in the region in which the bolt contacts the receiving socket, that is, on the contact side, the bolt connection without play or form-fitting, whereas on the non-contact side game between bolt and receiving socket is present.

At this point, it should be noted that above always at least one recording in the bogie frame is mentioned. That means not just one, but For example, two receptacles or recording sockets can be provided in the bogie frame. In the case of two shots, for example, these would be arranged on both sides of the rocker; The bogie frame would thus be designed so that it runs around both sides like a fork around the swingarm. In this case, the bolt in the transverse direction would therefore first pass through the first receptacle in the bogie frame, then through the receptacle in the rocker or in the rubber-metal bushing and finally through the second receptacle in the bogie frame.

According to yet another embodiment of Radträgeranlenkung invention the bolt is covered against its insertion direction of a cover plate. Insertion direction means the direction in which the bolt is guided in the transverse direction through the receptacles to connect the rocker to the bogie frame. Such a cover plate serves to secure the bolt in the axial direction or to fix.

According to another embodiment of the Radträgeranlenkung invention is provided that the longitudinal axis of the bolt is in the same horizontal plane as the axis of rotation of the at least one wheel. This results in the load case to an ideal application of force to the bolt connection. It is preferred if the bolt connection and the spring element are arranged on the same side of a plane passing through the axis of rotation of the wheel vertical plane.

It is also preferred that the direction of action of the spring element or the spring axis, the axis of rotation of at least a wheel cuts, that runs through the axis of the wheel.

It is conceivable that the angle between the effective direction of the spring element (the spring axis) and the horizontal in a range of 0 to 70 °, preferably from 20 to 60 °, particularly preferably from 30 to 50 °, the angle is ideally 45th ° is.

The object is further achieved by a rail vehicle with a Radträgeranlenkung as previously described. In other words, the Radträgeranlenkung be part of a bogie of a rail vehicle.

According to one embodiment of the rail vehicle according to the invention, the spring element is a compression spring, in particular a compression spring of a primary suspension of the rail vehicle. In this way, the weight of the car body is automatically used to push the rocker and the wheel carrier of the bogie frame and thus to apply the bolt in the direction of the contact surface of the respective recording.

Since a primary suspension is usually present in a rail vehicle anyway, no additional spring element must be provided for the purposes of the invention.

Finally, according to another embodiment of the rail vehicle according to the invention, it is provided that in the operational state of the rail vehicle the spring element is permanently in the pressurized state and / or the bolt is constantly in contact with the edge of the receptacle, in particular, the at least one receptacle in the bogie frame and / or the receptacle in the rocker or, in the presence of such a socket, the receptacle in the socket, for example rubber-metal socket, is pressed. By ready state, a state is meant in which the weight of the car body rests on the bogie frame and accordingly the spring element is pressurized. A relieved state of the spring element can be caused by the fact that the rail vehicle is jacked example.

Fig. 1

eine schematische Seitenansicht einer erfindungsgemäßen Radträgeranlenkung,

Fig. 2

eine schematische Schnittansicht durch eine Radträgeranlenkung gemäß Fig. 1,

Fig. 3

eine weitere schematische Seitenansicht der erfindungsgemäßen Radträgeranlenkung gemäß Fig. 1 und

Fig. 4

eine schematische Darstellung einer Bolzenverbindung für die erfindungsgemäße Radträgeranlenkung im unbelasteten und belasteten Zustand.

There are now a variety of ways to design and further develop the Radträgeranlenkung invention and the rail vehicle according to the invention. For this purpose, reference is made, on the one hand, to the claims subordinate to patent claim 1, and, on the other hand, to the description of exemplary embodiments in conjunction with the drawing. In the drawing shows:

Fig. 1

a schematic side view of a Radträgeranlenkung invention,

Fig. 2

a schematic sectional view through a Radträgeranlenkung according to Fig. 1 .

Fig. 3

a further schematic side view of the Radträgeranlenkung invention Fig. 1 and

Fig. 4

a schematic representation of a bolt connection for the invention Radträgeranlenkung in the unloaded and loaded condition.

In Fig. 1 is a Radträgeranlenkung 1 a bogie of a rail vehicle shown. Of the bogie here the bogie frame 2, the wheel 3 and a spring element 5 is shown in the form of a primary spring.

The wheelset 3 contains a plurality of wheels 3.1, of which only one is shown here, as well as a wheel carrier 3.2 holding this 3.2. The wheel carrier 3.2 is connected to a rocker 3.3, which is pivotally connected via a bolt connection 4 with the bogie frame 2. The wheel carrier 3.2 is also connected to the bogie frame 2 via said primary spring 5, which is a compression spring here.

The bolt connection 4 has a bolt 4.1, here a metal bolt, and a plurality of receptacles 2.1 and 3.31 or 6.11. As in Fig. 2 can be seen, the bolt extends in the direction of insertion E _B first by a left bogie frame recording 2.1 in the bogie frame 2, then by a swing 3.31 the rocker 3.3, more precisely by a recording 6.11 in a rubber-metal socket 6, and finally by a right bogie frame recording 2.1 of the bogie frame 2. The left and right bogie frame receiver 2.1 is each formed by a receiving socket 2.2, which is also made of metal.

As Fig. 2 shows, the rocker 3.3 is connected via the rubber-metal socket 6 with the bolt 4.1. The rubber-metal bushing 6 has an inner bushing element 6.1 made of metal, a middle bushing element 6.2 made of rubber and an outer Bush element 6.3 made of metal. The inner and outer bushing elements 6.1 and 6.3 are cylindrical in shape.

The bolt connection 4 is in the region of the connection between bolt 4.1 and bogie frame receptacle 2.1 as well as in the area of the connection between bolt 4.1 and rocker seat 3.31 and bushing receptacle 6.11 afflicted. This is schematically in Fig. 4 for the bolt connection 4 between bolt 4.1 and bogie frame 2 shown. Fig. 4a ) shows an unloaded and Fig. 4b ) a loaded or pressurized state.

The loaded state is achieved as follows: The effective direction F of the spring element 5 extends obliquely to the horizontal H and vertical V, such that in the pressurized state of the spring element 5, that is, if the vertical load of the (not shown) car body of the rail vehicle on the spring element 5 acts, the wheel 3.2 is pressed together with the rocker 3.3 from the bogie frame 2. This pressure also acts on the rocker connection 4 via the rocker arm and causes the bolt 4.1 to be pressed against the edge of the receptacle 2.1 of the bogie frame 2 and correspondingly against the inner surface of the inner bushing element 6.1 of the rubber-metal bushing 6. In the area in which the bolt 4.1 contacts the receptacle 2.1 or the inner bushing element 6.1, that is, on the contact side, the bolt connection 4 is free of play. Here there is a positive connection between bolt 4.1 and receptacle 2.1 or inner bushing element 6.1. On the side facing away from contact, on the other hand, there is clearance between the bolt 4.1 and the receptacle 2.1 or inner bushing element 6.1. Fig. 4b ) shows for bolt connection 4 between bolt 4.1 and recording 2.1 of the bogie frame 2 the play-free state on the contact side and the game-afflicted state on the kotaktabgewandten page. This is also in Fig. 2 to recognize in detail IIa and IIb. For the bolt connection 4 between bolt 4.1 and rubber-metal bushing 6 or inner bushing element 6.1 shows the detail IIc and IId in Fig. 2 a corresponding state.

If the bogie frame 2 and thus the spring element 5 relieved, also the bolt 4.1 or the bolt connection 4 is relieved, which Fig. 4a ), whereby the bolt 4.1 in a simple manner from the bogie frame receiving 2.1 and the swing seat 3.31, that is, from the inner sleeve member 6.1 of the rubber-metal socket 6, can be removed.

As Fig. 4 shows, the bolt connection 4 has both a vertical clearance s _V and a horizontal clearance s _H. This applies both to the pressurized state and the unloaded state of the spring element 5, both for the bolt connection 4 between bolt 4.1 and bogie frame 2 and for the bolt connection 4 between bolt 4.1 and rocker 3.3, that is between bolt 4.1 and rubber. Metal socket 6.

As the FIGS. 1 to 3 clearly show the bolt 4.1 runs in the horizontal H, namely parallel to the axis of rotation D _{R of} the wheel 3.1. The longitudinal axis X _{B of} the bolt 4.1 and the thus identical rotation axis D _{S of} the rocker 3.3 lies in the same horizontal plane as the axis of rotation D _{R of} the wheel 3.1. Bolt 4 and spring element 5 are also on the same side of a through the axis of rotation D _{R of} the Rades 3.1 extending vertical V arranged. The effective direction F of the spring element 5 intersects the axis of rotation D _{R of} the wheel 3.1. The angle α between the effective direction F of the spring element 5 and the horizontal H is here at 45 °.

As the Figures 2 and 4 show particularly vividly, it is the bolt 4.1 in the present case to a hollow bolt, although according to the invention also bolts of solid material can be used. The bolt 4.1 is here designed as a square bolt, wherein the receptacle 2.1 or receiving bushing 2.2 and the receptacle 6.11 of the rubber-metal bushing 6 also has a quadrangular inner cross-section.

Finally, in Fig. 2 on the left side, a cover plate 7 is shown, which covers the bolt 4.1 against its insertion direction E _B and fixed.

Claims (15)

1. A wheel mount linkage (1) for a rail vehicle,

   - having a bogie frame (2),

   - having a wheel set (3) comprising at least one wheel (3.1) and a wheel mount (3.2) holding the wheel (3.1),

   - wherein the wheel mount (3.2) on the one hand is provided with a swing arm (3.3), which is pivotably connected to the bogie frame (2) by means of a bolt connection (4), and is on the other hand resiliently connected to the bogie frame (2) by means of a spring element (5),

   - wherein the bolt connection (4) comprises a bolt (4.1) with a bolt shaft, which is passed through a mounting (3.31, 6.11) in the swing arm (3.3) and through at least one mounting (2.1) in the bogie frame (2),

   - wherein the bolt connection (4) has play, and the direction of action (F) of the spring element (5) runs obliquely to the horizontal (H) and the vertical (V) in such a manner that the wheel mount (3.2) together with the swing arm (3.3) is pushed away from the bogie frame (2) when the spring element (5) is in the compression-loaded state,

   characterised in that in a section transverse to the longitudinal axis (X_B) of the bolt (4.1), the bolt shaft of the bolt (4.1) has an outer contour that is not round, and a mounting (2.1, 3.31, 6.11) for the bolt (4.1) has an inner contour that is not round, so that the bolt (4.1) does not easily rotate in the respective mounting (2.1, 3.31, 6.11) when under load.
2. The wheel mount linkage (1) according to Claim 1, characterised in that the bolt (4.1) is pressed against the edge of the mounting (2.1, 3.31, 6.11), in particular of the at least one mounting (2.1) in the bogie frame (2), when the spring element (5) is in the compression-loaded state.
3. The wheel mount linkage (1) according to Claim 1 or 2, characterised in that the bolt connection (4) has a vertical play (s_V) and/or a horizontal play (s_H) between the bolt (4.1) and the mounting (2.1, 3.31, 6.11), in particular the at least one mounting (2.1) in the bogie frame (2).
4. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that the bolt (4.1) runs in the horizontal (H) and in particular parallel to the rotation axis (D_R) of the at least one wheel (3.1).
5. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that in a section transverse to the longitudinal axis (X_B) of the bolt (4.1), the non-round outer contour and/or the non-round inner contour has at least one corner (4.11), preferably four corners (4.11).
6. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that the bolt (4.1) is a hollow bolt.
7. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that a rubber-metal bush (6) is inserted into the mounting (3.31) in the swing arm (3.3) without play and in a rotationally fixed manner, in particular in a press fit, wherein the bolt (4.1) is inserted into the rubber-metal bush (6), in particular into a mounting (6.11).
8. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that the at least one mounting (2.1) in the bogie frame (2) is formed by a mounting bush (2.2), which is connected to the rest of the bogie frame (2) without play and in a rotationally fixed manner, in particular in a press fit.
9. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that the bolt (4.1) is covered by a cover plate (7) against the insertion direction (E_B) of the bolt.
10. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that the longitudinal axis (X_B) of the bolt (4.1) lies in the same horizontal plane as the rotation axis (D_R) of the at least one wheel (3.1).
11. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that the direction of action (F) of the spring element (5) intersects the rotation axis (D_R) of the at least one wheel (3.1).
12. The wheel mount linkage (1) according to any one of the preceding claims, characterised in that the angle α between the direction of action (F) of the spring element (5) and the horizontal (H) lies in a range from 0 to 70°, preferably from 20 to 60°, particularly preferably from 30 to 50°.
13. A rail vehicle having a wheel mount linkage (1) according to any one of the preceding claims.
14. The rail vehicle according to Claim 13, characterised in that the spring element (5) is a compression spring of a primary suspension of the rail vehicle.
15. The rail vehicle according to Claim 13 or 14, characterised in that when the rail vehicle is in the state ready for operation, the spring element (5) is permanently in the compressed state and/or the bolt is constantly pressed against the edge of the mounting (2.1, 3.31, 6.11), in particular of the at least one mounting (2.1) in the bogie frame (2).

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