EP1048543B1 - Railway vehicle bogie with three steered wheel sets - Google Patents

Abstract

The bogie has a central (12) and two end (3) wheel sets arranged in a frame (2). Each wheel set has a drive unit. For a curv path, the end wheel sets turn outwards against the longitudinal direction of the frame. Each end wheel set is connected to the f at its drive unit with at least one inclined shaft (1). The central wheel set is connected to the frame with at least one longitudinal shaft parallel to the frame.

Description

Technical field

The invention relates to the field of mechanics for rail vehicles. It goes out of an adjustable bogie with three wheelsets for a rail vehicle according to the Preamble of the independent claim.

State of the art

Bogies for today's rail vehicles are often required to cope with high cornering speeds in mostly tight bends. For this purpose, an adjustable biaxial bogie is known, as described in CH 670 228 A5. In this biaxial bogie, the wheel sets are set automatically radially to the curve to be traversed when driving through curves, without any control or regulation effort, in particular without additional adjustment devices. The wheelsets are arranged on the bogie frame via the motor by means of semi-trailing arms in such a way that a rotary movement about a vertical axis (vertical axis) around the center of the wheelset is possible, even when tensile forces are exerted on the bogie.
Furthermore, a three-axle bogie is known from DE 41 40 126 A1, which has a radial control for the radial deflection of the wheelsets of the bogie. The wheel sets are mounted elastically on the bogie frame, whereby the radial deflection of the wheel sets is made possible by means of steering linkages, trailing arms, handlebars, coupling rods and angle levers with arms arranged thereon.
With this three-axle bogie, the radial setting of the wheel sets is possible, but due to the large wheelbase and the simultaneous enabling of the radial setting of the wheel sets, a large number of parts that are arranged or installed in a complex manner are necessary. This increases the manufacturing costs of such a bogie to an unsustainable extent. In addition, the maintenance of this large number of parts proves to be too cost-intensive.
Neither from CH 670 228 A5 nor from DE 41 40 126 A1 does a cost-effective and maintenance-intensive solution for a bogie result, in particular for the three-axis applications required today.
Common braking devices for three-axle bogies are firmly connected to the bogie frame. A problem of such a bogie frame-fixed and acting on the respective wheel discs braking device is in terms of their attachment to the bogie frame, since the transverse deflection and longitudinal deflection between the respective braking device and the associated wheel disc is too large to act appropriately on the wheel disc. A transverse elastic suspension of the braking device or a transverse guide of the braking device is conceivable, but complicates the bogie construction and increases the component and maintenance costs considerably, so that a bogie frame-fixed braking device for an inexpensive three-axle bogie fails.

EP 0 094 548 A2 describes a drive for Rail vehicles with three wheelsets, with over Coupling elements or guides of each wheel set with one Vehicle frame is connected. The outer wheelsets are each over an approximately the longitudinal axis of the vehicle assigned guide element as a transmitter with the Vehicle frame connected. The middle wheel set is on each side arranged in the vehicle longitudinal direction Guide element coupled to the vehicle frame.

Presentation of the invention

The object of the invention is therefore an adjustable bogie with three wheelsets for Specify rail vehicle, which is a radial adjustment of the wheelsets, in particular even under the influence of tractive force and braking force on the bogie without any control or regulation effort, in particular without additional actuating devices to be operated, and in which the number of parts is reduced and thus an extremely simple structure of the bogie is possible. This object is solved by the features of the independent claim. Further advantageous embodiments of the invention are specified in the subclaims.

In the case of the adjustable bogie according to the invention with three wheel sets for a rail vehicle, two end wheel sets of the bogie are in each case on their drive devices
two semi-trailing arms are connected to the bogie frame and a center wheel set with at least one longitudinal link guided parallel to the longitudinal direction of the bogie frame is connected to the bogie frame. By coupling the middle wheel set to the bogie frame in this way, it can only perform a transverse movement, which advantageously saves common coupling rods. Furthermore, the traction and braking force can be transmitted via the center wheel set, in particular via the drive device of the center wheel set. The wheelsets of the bogie can thus be set radially in a particularly simple manner.
A further embodiment of the bogie according to the invention provides that the end wheel sets are connected to the drive unit of the center wheel set via at least one wishbone each and via a drive unit arm that is operatively connected to the wishbone in such a way that the end wheel sets are coupled when the center wheel set moves transversely and that during a turning movement the end wheel sets are coupled in opposite directions. This configuration of the bogie according to the invention further supports the radial adjustment of the wheel sets and can be carried out quickly.
In addition, the drive unit of each wheel set comprises at least one braking device, which is arranged directly on a motor or on the transmission housing and acts on at least one wheel disk of the associated wheel set. This eliminates extremely advantageously a complicated, costly and maintenance-intensive attachment of the braking device to the bogie frame and the braking device can be very easily attached directly to the drive device, which carries out every movement of the wheel sets.

Brief description of the drawings

The invention will be explained in the following using exemplary embodiments in connection with the drawing explained in more detail.

Fig. 1

eine Draufsicht eines Ausführungsbeispiels eines einstellbaren Drehgestells mit drei Radsätzen für ein Schienenfahrzeug und

Fig.2

eine Darstellung des Ausführungsbeispiels des Drehgestells nach Fig.1 in der Seitenansicht.

Show it

Fig. 1

a plan view of an embodiment of an adjustable bogie with three wheelsets for a rail vehicle and

Fig.2

a representation of the embodiment of the bogie according to Figure 1 in side view.

The reference symbols used in the drawing and their meaning are in the list of reference symbols summarized listed. Basically, the same parts are in the figures provided with the same reference numerals.

Ways of Carrying Out the Invention

Fig. 1 shows an embodiment of a bogie according to the invention with three wheel sets for a rail vehicle. In it, the wheel sets 3, 12 of the bogie are usually formed by two end wheel sets 3 and a center wheel set 12. The two end wheel sets 3 and the center wheel set 12 are arranged in a bogie frame 2, the two end wheel sets 3 being rotatable relative to the longitudinal direction of the bogie frame 2, ie being able to perform a turning movement and thus being radially adjustable through a curved track when cornering. Each wheel set 3, 12 comprises a drive unit which has a motor 6 and a gear housing 11 with a gear arranged therein. 1, the two end wheel sets 3 are connected according to the invention on their drive units with at least one semi-trailing arm 1 to the bogie frame 2. In addition, the center wheel set 12 is connected to at least one trailing arm 4 on the bogie frame 2 which is guided parallel to the longitudinal direction of the bogie frame 2. This arrangement of the trailing arm 4 and the semi-trailing arm 2 ensures that common coupling rods can be saved. Furthermore, due to this coupling of the center wheel set 12, the center wheel set 12 only executes a transverse movement. Accordingly, the center gear set 12 and in particular its drive unit represents a coupling member between the end gear sets 3, via which traction and braking force can be transmitted. The wheel sets 3, 12 are radially adjustable, whereby, as mentioned at the beginning, the two end wheel sets 3 can be turned out and the central wheel set 12 can carry out a transverse movement.
In a further embodiment of the bogie according to the invention according to FIG. 1 and according to FIG. 2, which represents a side view of the bogie according to FIG. 1, the end wheel sets 3 are operatively connected via at least one wishbone 5a, b and one on the wishbone 5a, b arranged drive unit boom 13 connected to the drive unit of the center wheel set 12 in such a way that when the center wheel set 12 is moved transversely, the end wheel sets are also coupled and that, in addition, when the end wheel sets 3 are unscrewed, they are coupled in opposite directions. This configuration of the bogie according to the invention facilitates the unscrewing movement of the end wheel sets 3 and the transverse movement of the center wheel set 12, so that the wheel sets can be adjusted radially particularly easily and this takes place rapidly.
1, the connection between an end wheel set 3 and the center wheel set 12 is constructed such that the control arm 5a is arranged on the drive unit of this end wheel set 3 and is connected to the drive unit of the center wheel set 12 via the drive unit boom 13 arranged in operative connection on the control arm 5a ,
Furthermore, a further connection is established between the further end wheel set 3 and the center wheel set 12 in such a way that the control arm 5b is arranged on the drive unit of this center wheel set 12 and is connected to the drive unit of the further end wheel set 3 via the drive unit boom 13 arranged in operative connection on the control arm 5b ,

It is conceivable, but not shown in the exemplary embodiment, that a drive unit boom 13 is either arranged on each drive unit of the end wheel sets 3, or that all drive unit booms 13 are arranged on the drive unit of the center wheel set 13. Each end wheel set 3 is then, as mentioned at the beginning, connected to the drive unit of the center wheel set 12 via the control arm 5a, b and via the associated drive unit boom 13 arranged in operative connection on the control arm 5a, b.
Each wishbone 5a, b is three-dimensionally mounted with the drive unit boom 13 arranged thereon in operative connection. As a result, forces between the control arm 5a, b and the drive unit boom 13, which are necessary for the radial adjustment of the wheel sets, can also be transmitted to the bogie under the influence of traction and braking force and under the forces acting spatially on the bogie.
According to FIG. 2, all axles 14 of the drive units of the wheel sets 3, 12 are supported by means of an axle bearing device 7, so that the axles 14 are advantageously supported vertically and transversely to the longitudinal direction of the bogie frame 2.

According to the invention, each drive unit according to FIG. 1 comprises at least one braking device 8, each braking device directly on the motor 6 or on the gear housing 11 is arranged. Each braking device 8 acts on at least one wheel disk 10 of the associated wheel set 3, 12. This arrangement of the braking device 8 can this execute any movement of the associated gear set 3, 12, which makes a complicated as well as maintenance and cost-intensive attachment of a braking device to the bogie frame 2 omitted. Furthermore, it has proven to be very advantageous that the braking device via a holding device arranged between the motor 6 or the transmission housing 11 9 is arranged on the motor 6 or gear housing 11. This makes it possible to use the braking device 8 to wait in a short time. The braking device 8 is advantageously a Brake block device, because this for a three-axle bogie with the high number too braking wheel disks 10 represents an extremely inexpensive braking device 8. A Another very favorable embodiment of the braking device 8 is a not shown Wheel disc brake device, which directly on the wheel disc 10 of the associated wheel set 3.12 acts, the wheel disc 10 being a brake disc.

LIST OF REFERENCE NUMBERS

1

trailing arm

2

bogie frame

3

end wheel

4

Trailing arm

5a, b

wishbone

6

engine

7

axle bearing

8th

braking means

9

holder

10

wheel disc

11

gearbox

12

center wheel

13

Drive unit boom

14

axes

Claims (8)

1. An adjustable bogie,which has three wheelsets, for a railway vehicle, the wheelsets, formed by a central wheelset (12) and two end wheelsets (3), being arranged in a bogie frame (2) and each wheelset (3, 12) including a drive unit, the two end wheelsets (3) being rotatable outward in relation to the lengthwise direction of the bogie frame (2) during curve travel and the central wheelset (12) being connected to the bogie frame by at least one pull rod (4) guided parallel to the lengthwise direction of the bogie frame (2),
   characterized in that
   the two end wheelsets (3), on their drive units, are each connected to the bogie frame (2) via two tilted rods (1).
2. The bogie according to Claim 1,
   characterized in that
   the end wheelsets (3) are each connected via at least one transverse link (5a,b) and via a drive unit extension arm (13), arranged on the transverse link (5a,b) in mechanical linkage thereto, to the drive unit of the central wheelset (12) in such a way that in the event of a transverse movement of the central wheelset (12), the end wheelsets (3) are coupled with the latter and, in the event of an outward rotational movement of the end wheelsets (3), they are coupled in the opposite direction.
3. The bogie according to Claim 2,
   characterized in that
   the transverse link (5a,b) is three-dimensionally mounted with the drive unit extension arm (13).
4. The bogie according to Claim 3,
   characterized in that
   the axles (14) of the drive units of the wheelsets (3, 12) are nose-suspended using an axle bearing device (7).
5. The bogie according to Claim 4,
   characterized in that
   the drive units each include at least one braking device (8), each braking device (8) being arranged directly on the engine (6) or on the transmission housing (11) and acting on at least one wheel disk (10) of the associated wheelset (3, 12).
6. The bogie according to Claim 5,
   characterized in that
   the braking device (8) is positioned on the engine (6) or on the transmission housing (11) via a support device (9) arranged between the motor (6) or the transmission housing (11).
7. The bogie according to Claim 6,
   characterized in that
   the braking device (8) is a brake pad device.
8. The bogie according to Claim 6,
   characterized in that
   the braking device (8) is a wheel disk braking device.

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