FR2780373A1 - OSCILLATING SUPPORT - Google Patents

Abstract

The invention provides for the first time an oscillating support 1 for a car body of a vehicle, in particular of a railway vehicle, which comprises an elastic support body. The oscillating support 1 is here arranged between a bogie of the vehicle and the car body and rests on the bogie by means of a first rolling articulation 22 or 25, the oscillating support 1 further resting on the bogie via a second rolling articulation 23 or 27. This makes it possible to significantly increase the mobility of the swinging support in the lateral direction, while being able to obtain a particularly low overall height with a high load capacity. In addition, only a small number of elements, simple fixing, are needed, which allows both a reduction in costs and a reduction in the cost of assembly.

Description

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  Oscillating support The invention relates to an oscillating support with elastic support body for a car body, in particular of a railway vehicle, the oscillating support being disposed between a bogie of the vehicle and the car body and resting on the bogie by through a first articulation

rolling.

  Oscillating supports are used to allow parallel movements of building elements on vehicles. Cases of application of oscillating supports for bogies of railway vehicles are described, for example, in the documents DE 44 10 970 C1 and DE 195 17 938 Cl. Leg constructions are used in particular for the suspension of a railway vehicle of spring force which guarantee, in addition to the vertical suspension of the car body, lateral mobility with a defined effect of recall. An embodiment of this kind is described in document DE 42 35 878 A1. The oscillating support described therein is combined with a hydropneumatic cylinder. One end of the oscillating support is fixed by means of a single spherical articulation on the piston of the jack assembly, while the end on the bogie side is provided with a rolling articulation which rolls spherically. A rod is provided in the two articulations of the oscillating support; it engages in the cylindrical tube

of the hydropneumatic cylinder.

  During transverse movements, the freedom of movement of this mode of construction is therefore limited by the freedom of movement of the rod of the oscillating support in the cylindrical tube. The transverse mobility is therefore determined by the diameter and the stroke of the cylinder, as well as by the sphere radius of the rolling joint, limits being imposed by construction on the load capacity due to the point contact in

the rolling joint.

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  Another form of construction of an oscillating support is described in document WO95 / 16596. According to this method of construction, the bearing on the bogie side of the oscillating support is not produced in the form of a hinge with a spherically rolling bearing, but in a combination of two hinged bearing articulations offset and offset by 90, rolling cylindrically. Without having to be resigned to important limitations concerning the mobility of the joint, this construction method allows an improved load capacity, because the cylindrical shape of the rolling faces

  allows the point contact to be replaced by a linear contact.

  The drawback of this construction method is the relatively complex production of the articulation assemblies, which generates an increased manufacturing cost and a reduced longevity. In addition, in this construction method also, mobility in the transverse direction is limited by the

  freedom of movement of the oscillating support rod in the cylindrical tube.

  Therefore, by construction, a relatively long oscillating support rod is chosen, in order to be able to be satisfied with a reduced pivot angle. It follows

  a relatively large footprint for the entire arrangement.

  The invention therefore aims to design an oscillating support of the type mentioned in the introduction so as to allow transverse mobility

  while having the shortest overall length possible.

  According to the invention, this is achieved by the fact that a conventional oscillating support is improved so that the oscillating support rests on the

  car body via a second rolling joint.

  According to the invention, it has been found that the mobility of the support oscillating in the lateral direction can be significantly increased if the two joints are produced in the form of rolling joints. This advantageously takes advantage of the advantageous properties of joints of this kind, in particular concerning a small size for a large load capacity. In addition, the point of application of the forces does not shift here as much from the medium as is the case in the prior art, so that

the layout is more stable.

  In addition, an appropriate design of the rolling faces makes it possible to adjust, in a manner adapted to the respective application, both the lateral mobility and the properties of the bearings in terms of behavior.

  and any recall characteristics.

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  For the oscillating support designed according to the invention, it is advantageous to do without the rod known by the document DE 42 35 878 A1 mentioned above, placed between the articulations of the oscillating support which

are described in this document.

  We can therefore achieve with simple means a remarkably functional oscillating support. In addition, only a small number of elements, of simple fixing, are required for this, which allows both

  reduction in costs and a decrease in assembly expenditure.

  In addition, it is thus possible to provide a robust oscillating support and

  therefore long life or requiring little maintenance.

  By the fact that the elastic support body of the oscillating support comprises a jack, in particular a hydropneumatic jack, which is resiliently mounted between the first and the second rolling joint, it is possible to have an inexpensive vertical suspension for a vehicle . In particular, it is thus possible to obtain a very small footprint. We thus obtain a construction method taking up very little space, which is

  relatively insensitive to external influences.

  It is also advantageous for the respective rolling faces of the first or of the second rolling joint to be formed on the end on the cylindrical tube side or on the cylindrical piston side of the jack. This can further reduce the size of the arrangement. In addition, the

  assembly of the entire arrangement is also simplified.

  As a variant, the elastic support body of the oscillating support may also comprise a jack, in particular a hydropneumatic jack, a bearing assembly of the oscillating support being arranged in series with the jack. The rolling assembly is provided with rolling faces of the first and second rolling joints. This construction method makes it possible to use a cylinder of merchantable quality, without having to give up the advantages of the oscillating support according to the invention. In addition, the production of rolling faces for rolling joints is simplified by their

  available on a single bearing body.

  By the fact that the second rolling joint is symmetrical with the first rolling joint, the pivot axis of the second rolling joint being oriented parallel to the pivot axis of the first rolling joint, the

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  transverse movement of the oscillating support in a desired direction. The oscillating support can thus be adapted to given dynamic conditions

of the vehicle.

  Preferably, the first and / or second rolling articulation rolls cylindrically, spherically or ellipsoid, suitable adaptations being possible for each application case. The pivoting behavior of the oscillating support can thus be adjusted

  particularly appropriately.

  If the pivot axes of the first and second rolling joints extend in the longitudinal direction of the vehicle, lateral movements can be suitably absorbed transversely to the direction of travel of the vehicle, as is preferred. In practice. We can thus take into account the conditions

  dynamic, for example in curves.

  It is also advantageous that the rolling joints each have a cylindrical rolling face and a planar rolling face. The cost of manufacturing rolling joints is thus significantly reduced, since there is only one curved surface to be produced. In addition, the radius of the cylindrical rolling face can be expected to be small thanks to the linear contact at the rolling joint, which further reduces the length.

overall.

  It is also advantageous for the pair of rolling faces of the first rolling joint and / or of the second rolling joint to be designed so that, during a rolling movement away from the central position of the oscillating support. , the vertical distance between the contact points of the respective rolling faces of the two rolling joints increases. It is thus possible to set a recall characteristic in the desired direction. The joints can thus be designed so that they automatically bring the body back

  of the vehicle in its original position.

  If a joint with two degrees of freedom, whose pivot axis extends in the transverse direction of the vehicle, is arranged at the point of assembly between the oscillating support and the car body and / or between the bogie and the support oscillating, one can also realize a pivoting ability in the longitudinal direction of the vehicle. In addition, we can hold

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  account of particular requirements of the practice, which require a free mobility of the oscillating support, for example without restoring force in the longitudinal direction of the vehicle. In cases of application of this kind, it is therefore possible to use articulations with two degrees of freedom of marketable quality. Thanks to its modular design, the oscillating support according to the invention can also be used for many other applications than

rail vehicles.

  The oscillating support may further include a

  elastic support which serves as an emergency suspension for the jack.

  The invention thus provides an oscillating support which, by means of a rolling assembly, allows greater transverse mobility with a reduced overall length. The rolling assembly of the oscillating support can be arranged in series with a cylinder, or alternatively, the cylinder can be interposed between the rolling joints of the rolling assembly. It is thus also possible to obtain remarkable characteristics of capacity of

  load, which extends the life of the oscillating support.

  The invention will now be explained on exemplary embodiments and with reference to the accompanying drawings, in which: FIG. 1 is a perspective view of an oscillating support without the elastic support body, in a first embodiment, the Figure 2 is a schematic representation of the oscillating support according to Figure 1, to illustrate its mode of operation, Figure 3 shows an oscillating support according to Figure 1 provided with a conventional hydropneumatic cylinder, and Figure 4 shows another embodiment an oscillating support, with a hydropneumatic cylinder between the rolling joints. According to the representation of FIGS. 1 to 3, a first embodiment of an oscillating support 1 comprises a rolling assembly 2, a hydropneumatic cylinder 3, a bogie joint 4 and a joint 5

car body.

  The rolling assembly 2, shown in perspective in FIG. 1, comprises a rolling body 21, which is provided on one side with a first cylindrical rolling face 22 and, on one side symmetrically

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  opposite with respect to the median axis of the rolling body 21, a second cylindrical rolling face 23. The first cylindrical rolling face 22 is in functional relation with the first support plate 24, which is provided with a first planar rolling face 25. The second cylindrical rolling face 23 is in functional relation with a second support plate 26, which is provided with a second planar rolling face 27. A lateral guide 28, which allows reliable operation of the rolling assembly 2, is also arranged on either side on the

front faces of the assembly.

  According to FIG. 2, the radii of the rolling faces 22 and 23 are chosen such that they are respectively greater than half of a vertical distance between the linear contact point of the cylindrical and planar rolling face and the 'middle axis of the rolling body 21. There is thus obtained in each pivoting position towards the outside, for example of a value y, a restoring torque for the oscillating support 1, since the vertical distance increases during this pivoting. The lateral guides 28 assist the return movement here, because they oppose a sliding of the faces of

  rolling one on top of the other and allowing a mutually adapted movement.

  In the case of application, provision is made to arrange the bearing assembly 2 so that the pivoting movement takes place in the direction transverse to the running direction of a vehicle. We can thus effectively absorb transverse forces, for example in curves. According to the representation in FIG. 3, the rolling assembly 2 can be combined with the jack 3, which makes it possible to obtain, in addition to the movement

  transverse vertical elastic action.

  The jack 3 comprises a cylindrical piston 31 and a cylindrical tube 32. The jack 3 can here be of conventional construction. In this embodiment, it is rigidly connected, by means of the piston 31

  cylindrical, to the second plate 26 for supporting the rolling assembly 2.

  A pressurized fluid, generally oil, is found in the cylindrical chamber of the jack 3, which communicates with a pressure accumulator 34 via a line 33. In the pressure accumulator 34, the oil acts on a gas cushion which, due to its compression properties,

  allows the cylinder 3 to exert an elastic action.

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  In addition, according to the representation in FIG. 3, the bogie articulation 4 is provided on the first support plate 24 of the assembly 2 to

  bearing, articulation which performs a pivoting coupling to the bogie.

  The articulation 5 of the car body is also coupled to the cylindrical tube 32 of the actuator 3, articulation whose pivot axis is made parallel to the pivot axis of the bogie articulation 4. The articulation 5 of the car body allows a pivoting coupling to a car body 50, by means of bolting. The articulations 4 and 5, with their two degrees of freedom, therefore allow free mobility of the car body 50

  relative to the bogie in the longitudinal direction of the vehicle.

  With this embodiment, an oscillating support is provided with elastic properties which is movable transversely to the longitudinal direction of the vehicle with restoring force, and movable in the direction

  longitudinal of the vehicle without restoring force.

  If mobility in the longitudinal direction of the vehicle is not desired, it is also possible to give up the articulation 4 of the bogie and the articulation of the car body. Figure 4 shows another embodiment of an oscillating support 100. This oscillating support 100 comprises a jack 103, which comprises a cylindrical piston 131 and a cylindrical tube 132. The cylindrical piston 131 is here integrally connected to a first cylindrical face 122 of the bearing of the first bearing joint. The first cylindrical rolling face 122 rolls on a first rolling face 125

  a first support plate 124.

  The cylindrical tube 132 is integrally provided, on the side opposite the first rolling joint, with a second cylindrical rolling face 123 of the second rolling joint. This second cylindrical rolling face 123 rolls on a second planar rolling face 127. The second planar rolling face 127 is formed on a second support plate 126, which is connected to a car body of a vehicle. The first and second ball joints are

  respectively provided with lateral guides 128.

  In addition, an elastic bellows 110 made of elastomeric material is disposed between the end of the cylindrical tube 132 of the jack 103 and the first

  support plate 124; it serves as protection against fouling.

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  The construction method according to the second embodiment makes it possible to obtain a very small footprint. As in the first embodiment, the rolling joints of the second embodiment are arranged parallel to each other so that they allow a pivoting movement with restoring force transversely to the direction of travel of the vehicle. Optionally, it is also possible to add, to connect the oscillating support 100 to the bogie and to the car body, articulations which allow pivoting in the

  longitudinal direction of the vehicle.

  In addition to the embodiments shown here, the invention

  allows other design possibilities.

  The radii of the cylindrical rolling faces of the individual rolling joints can thus be chosen differently, to produce

  particular movement characteristics.

  In addition, the cylindrical rolling faces can also be replaced by spherical or ellipsoidal rolling faces, which allow other characteristics of movement of the oscillating support. One can thus also realize possibilities of movement in several directions. By way of example, with a spherical shape of the rolling faces, it is thus also possible to obtain mobility in the longitudinal direction of the vehicle without the need for additional articulations.

  such as bogie joint 4 and car body joint 5.

  In addition, the oscillating support 1 according to the invention is not limited to the use of the jacks 3 or 103 shown, but can also be designed with

  other means of suspension, or even without suspension.

  Joints 4 and 5 with two degrees of freedom can also be replaced by other types of joints allowing movement

  desired pivoting in the longitudinal direction of the vehicle.

  The faces 122 and 123 of the embodiment according to FIG. 3 can also be separately manufactured, and coupled to the piston 131

  cylindrical and, respectively, to the cylindrical tube 132.

  In addition, one can also combine as rolling faces of a rolling joint two cylindrical faces, ellipsoid or spherical. Curved rolling faces can also be formed on

the support plates.

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Claims (11)

  1.- Support (1 or 100) oscillating with elastic support body for a car body, in particular of a railway vehicle, the support (1 or) oscillating being arranged between a bogie of the vehicle and the car body and s' pressing on the bogie by means of a first rolling joint (face 22 or 122 of bearing), characterized in that the oscillating support (1 or 100) rests on the car body by means of a second rolling joint (face 23 or 123).   2.- oscillating support according to claim 1, characterized in that the elastic support body comprises a jack (3 or 103), in particular a hydropneumatic cylinder.   3.- Oscillating support according to claim 1 or 2, characterized in that the jack (3 or 103) is resiliently disposed between the first and the second articulation with bearing (faces 22 and 122 of bearing or faces 23 and 123).   4.- Oscillating support according to any one of claims   1 to 3, characterized in that respective faces (23 or 123 and 27 or 127) of rolling of the first or of the second rolling joint are formed on the end on the cylindrical tube side or on the cylindrical piston side of the jack. 5.- Oscillating support according to claim 2, characterized in that a set (2) of bearing of the oscillating support (1) is arranged in series with the jack (3), the assembly (2) of bearing being provided with sides (22 or 25)   of the first and second rolling joints.   6.- Oscillating support according to any one of the claims   1 to 5, characterized in that the second rolling joint is symmetrical with the first rolling joint, the pivot axis of the 2780373   second rolling joint being oriented parallel to the axis of   pivoting of the first rolling joint.   7.- oscillating support any one of claims 1 to 6,   characterized in that the first and / or the second rolling joint rolls cylindrically, spherically or ellipsoid.   8.- oscillating support any one of claims 1 to 7,   characterized in that the pivot axes of the first and second rolling joints are oriented in the longitudinal direction of the vehicle.   9.- oscillating support any one of claims 1 to 8,   characterized in that the rolling joints each have a face (22 and 23 or 122 and 123) of cylindrical bearing and a face (25 and 27 or and 127) flat bearing.   10.- Oscillating support any one of claims 5 to 9,   characterized in that the pair of rolling faces of the first rolling joint and / or of the second rolling joint is designed so that, during a rolling movement away from the central position of the support (1 or 100) oscillating, the vertical distance (a) between the contact points of the respective rolling faces of the two   rolling joints increases.   11. Oscillating support any one of claims 1 to   , characterized in that a joint (4 or 5) with two degrees of freedom, the pivot axis of which extends in the transverse direction of the vehicle, is arranged at the connection point between the support (1 or 100) oscillating and the   car body and / or between the bogie and the oscillating support.