EP3798077A1 - Undercarriage for a rail vehicle - Google Patents

Abstract

The invention relates to a running gear for a rail vehicle, having at least one running gear frame (1) to which at least one first set of wheels (9) is coupled. In order to create advantageous design conditions, it is proposed that at least one running gear component be installed by means of at least one first bearing device (16). , which is connected to at least one first spring device (20), is coupled to the at least one chassis frame (1) via the at least first spring device (20), the at least first bearing device (16) in a first recess (18) of a first carrier (4) of the at least one chassis frame (1) is arranged protruding and the at least first spring device (20) is arranged in the first recess (18), the first carrier (4) in the area of the first recess (18) having at least one first opening (30), which is closed by means of a first cover (31). This enables space-saving storage of the chassis components or reached in the landing gear.

Description

The invention relates to a running gear for a rail vehicle, with at least one running gear frame to which at least one first set of wheels is coupled.

A mechanically decoupled mounting of chassis components (e.g. engines, gears or brake components of rail vehicles) is particularly important at high driving speeds, since dynamic reactions, which are transmitted from a track to components of the chassis, for example due to track position errors, increase in intensity with increasing speed. Furthermore, when arranging and dimensioning bearings for chassis components, particularly in the case of internally mounted chassis, very limited installation space budgets must often be taken into account.

From the prior art, for example, describes WO 2017/133954 A1 an internally mounted chassis with a chassis frame, a transverse drive motor and a gearbox. At least three elastic bearings are arranged between the drive motor and the chassis frame, one of these elastic bearings being provided on at least one of two longitudinal members of the chassis frame.
In one in the WO 2017/133954 A1 The embodiment variant described is shown as an elastic bearing designed as an elastic bushing, which is inserted into a bore in a side member of the chassis frame.

Furthermore, the WO 2017/093094 A1 known, in which a chassis for a rail vehicle with a chassis frame, wheel sets and drive units is shown. The drive units are integrated in a cross member of the chassis frame.

In their known forms, the approaches mentioned have the disadvantage that either no strongly pronounced suspension behavior of the drive motor is to be expected or that assembly and dismantling of the drive units cause a great deal of effort.

The invention is therefore based on the object of specifying a chassis that has been further developed compared to the prior art, with a compact but nevertheless highly vibration-reducing and easily accessible component mounting.

According to the invention, this object is achieved with a chassis of the type mentioned at the outset, in which at least one chassis component is coupled to the at least one chassis frame via the at least first spring device by means of at least one first bearing device which is connected to at least one first spring device, the at least first Bearing device is arranged protruding into a first recess of a first carrier of the at least one chassis frame and the at least first spring device is arranged in the first recess, wherein the first carrier has at least one first opening in the area of the first recess, which is closed by a first cover.
Because the first bearing device protrudes into the first recess and is not completely encapsulated, simple and little time-consuming maintenance and servicing of the chassis component is achieved. For dismantling, the chassis component only needs to be threaded out of the recess and can then be removed from the chassis immediately. The first bearing device can remain connected to the chassis component.
By partially arranging the first bearing device in the first carrier in an installed state of the chassis component, a particularly space-saving arrangement of the chassis component is achieved.

The first recess is provided in the first carrier, whereby, for example, brackets that are welded to the chassis frame can be dispensed with and still sufficient installation space is achieved to be able to generously dimension the first spring device arranged in the recess.
As a result, with a corresponding arrangement and extension of the first opening up to a front edge of the first carrier, an enlargement of the first recess can be made possible, for which only the first cover has to be dismantled. The enlargement of the first recess in turn reduces the effort involved in dismantling and assembling the chassis components.

It is advantageous if the first recess is formed from a first belt, a second belt, a web and a first side wall and a second side wall.
As a result of this measure, an existing profile geometry of the carrier is used efficiently to form the first recess.

An advantageous embodiment is obtained when the at least first spring device is designed as a layer spring.
As a result, self-damping and acoustic damping of the first spring device are brought about.

A favorable solution is achieved when the at least first bearing device is connected to a second spring device, the at least first spring device being connected to the at least first bearing device via a first contact zone of the at least first bearing device and the second spring device via a second contact zone of the at least first bearing device is connected to the at least first storage device, the first contact zone being arranged opposite the second contact zone.

By this measure, on the one hand, a particularly effective suspension is achieved and, on the other hand, by arranging the first bearing device between the first spring device and the second spring device, protection of the first bearing device from excessive loads.

It can also be advantageous if the at least first spring device protrudes into the at least first opening and is arranged in contact with the first cover.
As a result of this measure, the first carrier is at least partially relieved of spring reactions from the first spring device. A stiffening of the first carrier in the area of the first recess is not necessary or at least only has to be weak, since at least some of the spring reactions are not introduced into the first carrier but into the cover.
Furthermore, a preload is built up in the first spring device when the first cover is installed and the preload is reduced when the first cover is removed. The invention is explained in more detail below on the basis of exemplary embodiments.

Fig. 1:

Einen Grundriss eines Ausschnitts einer beispielhaften Ausführungsvariante eines erfindungsgemäßen Fahrwerks mit einer Antriebseinheit, welche über in einen Querträger eines Fahrwerksrahmens hineinragende Lagervorrichtungen federnd auf dem Fahrwerksrahmen gelagert ist, und

Fig. 2:

Einen Seitenriss eines Ausschnitts aus einem beispielhaften ersten Träger eines Fahrwerksrahmens eines erfindungsgemäßen Fahrwerks mit einer ersten Ausnehmung, in welche eine erste Lagervorrichtung einer Antriebseinheit des Fahrwerks hineinragt und in welcher zwei Federvorrichtungen angeordnet sind.

It shows by way of example:

Fig. 1:

A floor plan of a section of an exemplary embodiment of a chassis according to the invention with a drive unit which is resiliently mounted on the chassis frame via bearing devices protruding into a cross member of a chassis frame, and

Fig. 2:

A side elevation of a section of an exemplary first carrier of a chassis frame of a chassis according to the invention with a first recess into which a first bearing device of a drive unit of the chassis protrudes and in which two spring devices are arranged.

An in Fig. 1 A section of an exemplary variant of a chassis according to the invention shown as a floor plan comprises a chassis frame 1, a transverse drive motor 2, a transmission 3, a first carrier 4 configured as a cross member, a second carrier 5 configured as a first longitudinal carrier, a third carrier 6 configured as a second longitudinal carrier , as well as a first primary spring 7 and a second primary spring 8. The chassis has a first wheel set 9 and a second wheel set, not shown, which is structurally and with regard to its connection to the chassis frame 1 designed like the first wheel set 9.
The first wheel set 9 comprises a first wheel 10, a second wheel 11 and a wheel set shaft 12. The chassis has an internal bearing, ie the first wheel set 9 is internally supported, whereby the first wheel 10 and the second wheel 11 are arranged outside the chassis frame 1 . According to the invention, however, externally supported wheel sets or running gears with external bearings are also conceivable.

The wheelset shaft 12 has a first wheel set bearing, not shown, and a second wheel set bearing, also not shown. The first wheelset 9 is rotatably connected to the second carrier 5 via the first wheelset bearing and to the third carrier 6 via the second wheelset bearing. Furthermore, the first wheel set 9 is connected to the chassis frame 1 via the first primary spring 7 and the second primary spring 8 and via two wheel set guide devices (not shown).

The transmission 3 has a hollow transmission shaft 13 which is arranged in the form of a jacket around the wheelset shaft 12. An output coupling 14 is also arranged in the form of a jacket around the wheelset shaft 12 and connected to the hollow transmission shaft 13 in a form-fitting manner.
The output clutch 14 is designed according to the available state of the art and enables relative movements between the drive motor 2 and the transmission 3 on the one hand and the first gear set 9 on the other hand. Rotational movements and torques of a drive shaft, not shown, of the drive motor 2 are transmitted to the wheelset shaft 12 via the gear 3, the gear hollow shaft 13 and the output coupling 14.
The drive motor 2 and the gear 3 are elastically supported on the wheelset shaft 12 via the output coupling 14.

The drive motor 2 and the gear 3 are connected to a drive unit 15 via two housing parts screwed together, a motor housing part and a gear housing part.
The drive unit 15 is resiliently coupled to the first carrier 4 and thus to the chassis frame 1 via a first bearing device 16 and a second bearing device 17.
This is a cheap solution. According to the invention, however, it is also conceivable that the drive unit 15 are connected via the first bearing device 16 and the second bearing device 17, for example, to the second carrier 5, to the third carrier 6 or, in particular in the case of chassis for locomotives, to a chassis head carrier.
Furthermore, it is conceivable that the drive motor 2 and the gear 3 are mounted independently of one another on the chassis frame 1, the drive motor 2 being assigned the first bearing device 16 and the gear 3 being assigned the second bearing device 17.

The first bearing device 16 is designed in one piece with the motor housing part, which is designed as a metal cast part, and the second bearing device 17 is designed in one piece with the gear housing part, which is also designed as a metal casting. According to the invention, however, it is also conceivable to screw, weld, etc. the first bearing device 16 to the motor housing part and the second bearing device 17 to the gear housing part.

The first storage device 16 is also related to a Fig. 2 described first recess 18 of the first carrier 4, the second bearing device 17 is arranged protruding into a second recess 19 of the first carrier 4.

Below the first storage device 16 is an in Fig. 2 visible first spring device 20 is provided and connected to an underside of the first bearing device 16. A second spring device 21 is provided above the first bearing device 16 and is connected to an upper side of the first bearing device 16.
A third spring device 22 is provided above the second bearing device 17 and is connected to an upper side of the second bearing device 17.
Below the second storage device 17 is an in Fig. 1 A fourth spring device, which is not visible, is provided and connected to an underside of the second bearing device 17. The first bearing device 16 with the first spring device 20 and the second spring device 21 as well as the second bearing device 17 with the third spring device 22 and the fourth spring device are connected to the first carrier 4 and between a lower chord, shown in FIG Fig. 2 visible first belt 23 as well as a second belt 24 of the first carrier 4 designed as an upper belt.

The first spring device 20 and the second spring device 21 are arranged within the first recess 18, the third spring device 22 and the fourth spring device within the second recess 19.
The first spring device 20, the second spring device 21, the third spring device 22 and the fourth spring device are designed as layer springs with rubber segments and metal plates arranged between them.

Translational movements of the drive unit 15 in the longitudinal direction, in the transverse direction and in the vertical direction are effectively sprung due to the first spring device 20, the second spring device 21, the third spring device 22 and the fourth spring device. Furthermore, there is a suspension of certain rotary or pivoting movements of the drive unit 15 (for example about an axis running transversely to a direction of travel of the chassis).

In this exemplary variant of a chassis according to the invention, a chassis component designed as a drive unit 15 is coupled to the chassis frame 1 by means of the first bearing device 16 and the second bearing device 17, which is an inexpensive solution. According to the invention, however, it is also conceivable that other or further vehicle components (for example brake components such as brake cylinders with brake levers, antenna carriers, etc.), as in connection with Fig. 1 described, protruding into recesses of carriers of the chassis frame 1 and are resiliently mounted.

In Fig. 2 is a section of a first carrier 4 of a chassis frame 1, which is part of an exemplary variant of a chassis according to the invention for a rail vehicle and also in FIG Fig. 1 is disclosed as a side elevation.
The first carrier 4 is designed as a cross member of the chassis frame 1 and has a double-T profile. According to the invention, however, it is also conceivable that the first carrier 4 is designed, for example, as a longitudinal carrier or, in particular in the case of running gears for locomotives, as an end carrier.
The first carrier 4 has a first recess 18, which consists of a first belt 23 of the first carrier 4 designed as a lower belt, a second belt 24 of the first carrier 4 designed as an upper belt, a web 25 of the first carrier 4 and a first side wall 26 and a second side wall 27 is formed.

The first side wall 26 and the second side wall 27 are welded to the first carrier 4 and function as stiffening ribs of the first carrier 4.

A first storage device 16 in Fig. 1 The drive unit 15 of the chassis shown protrudes into the first recess 18 and is connected to a first spring device 20 via a first contact zone 28 and to a second spring device 21 via a second contact zone 29.
The first contact zone 28 is arranged opposite one another on an underside of the first bearing device 16 and the second contact zone 29, which is provided on an upper side of the first bearing device 16.
The first spring device 20 and the second spring device 21 are designed as layer springs.

The first spring device 20 is connected to the first belt 23, the second spring device 21 to the second belt 24. According to the invention, a first rubber buffer can also be used between the first spring device 20 and the first belt 23, and between the second spring device 21 and the second belt 24 as well a second rubber buffer can be provided.

In the area of the first recess 18, the first carrier 4 has a cylindrical first opening 30 which is closed by means of a first cover 31.
The first opening 30 is provided in the first belt 23, extends in the vertical direction and widens the first recess 18 downwards and forwards.
In the area of the first opening 30, the first spring device 20 is partially encased by the first belt 23.

The first spring device 20 projects into the first opening 30 and makes contact with the first cover 31 arranged and loads the first cover 31 with spring reactions.
The first cover 31 therefore has a corresponding strength and is connected to the first belt 23 in a rigid manner. Between the first cover 31 and the first belt 23 are a first screw 32, a second screw 33 and in Fig. 2 Other screws that are not visible and of the appropriate rigidity are provided.

In the first recess 18, between the first carrier 4 and the first spring device 20, specifically between the first carrier 4 and a lateral surface of the first spring device 20, an annular stop 34 made of rubber is provided, which surrounds the first spring device 20 and has screw ends first screw 32, the second screw 33 and the further screws is connected. As a result, lateral deflections of the first bearing device 16 are limited.

When the drive unit 15 is dismantled, the first screw 32, the second screw 33 and the further screws are loosened and removed from the first carrier 4 with the first cover 31. As a result, a preload of the first spring device 20 and the second spring device 21 is reduced.
Thereafter, the first bearing device 16 with the first spring device 20 and the second spring device 21 is threaded out of the first recess 18 via the first opening 30 downwards.
When assembling the drive unit 15, the first bearing device 16 with the first spring device 20 and the second spring device 21 is threaded through the first opening 30 from below into the first recess 18 and held therein.
Then the first cover 31 is placed from below on the first belt 23 and the first screw 32, the second screw 33 and the other screws are in corresponding Bores in the first cover 31 and in the first belt 23 inserted and tightened. As a result, the first cover 31 is tensioned against the first belt 23, the first spring device 20 and the second spring device 21 are pretensioned and the first bearing device 16, the first spring device 20 and the second spring device 21 are secured in the first recess 18.
The stop 34 is perforated so that it can be dismantled and threaded out before dismantling the first bearing device 16 and threaded and assembled after the first bearing device 16 has been assembled.

According to the invention, it is also conceivable that the first opening 30 is completely enclosed by the first belt 23, that is, the first recess 18 is not expanded to the front, whereby the bearing device 16 is threaded out of the first recess 18 when dismantling and when assembling must be threaded into the first recess 18 at the front.

The first opening 30 is provided in the first belt 23. According to the invention, however, it is also conceivable that, as an alternative or in addition, a second opening is provided in the second belt 24, which is closed by a second cover, the second spring device 21 protruding into the second opening and being arranged in contact with the second cover.

List of names

1

Undercarriage frame

2

Drive motor

3

transmission

4th

First carrier

5

Second carrier

6th

Third carrier

7th

First primary spring

8th

Second primary spring

9

First set of wheels

10

First bike

11

Second wheel

12th

Wheelset shaft

13th

Gearbox hollow shaft

14th

Output coupling

15th

Drive unit

16

First storage device

17th

Second storage device

18th

First recess

19th

Second recess

20th

First spring device

21

Second spring device

22nd

Third spring device

23

First strap

24

Second strap

25th

web

26th

First sidewall

27

Second side wall

28

First contact zone

29

Second contact zone

30th

First opening

31

First lid

32

First screw

33

Second screw

34

attack

Claims (11)

Running gear for a rail vehicle, with at least one running gear frame to which at least one first wheel set is coupled, characterized in that at least one running gear component by means of at least one first bearing device (16) which is connected to at least one first spring device (20) via the at least The first spring device (20) is coupled to the at least one running gear frame (1), the at least first bearing device (16) being arranged so as to protrude into a first recess (18) of a first carrier (4) of the at least one running gear frame (1) and the at least The first spring device (20) is arranged in the first recess (18), the first carrier (4) in the region of the first recess (18) having at least one first opening (30) which is closed by means of a first cover (31). Chassis according to Claim 1, characterized in that the at least one chassis component is designed as a drive unit (15). Chassis according to Claim 1, characterized in that the at least one chassis component is designed as a drive motor (2). Chassis according to Claim 1, characterized in that the at least one chassis component is designed as a transmission (3). Chassis according to Claim 1, characterized in that the at least one chassis component is designed as a braking device. Chassis according to one of claims 1 to 5, characterized in that the first recess (18) consists of a first belt (23), a second belt (24), a web (25) and is formed from a first side wall (26) and a second side wall (27). Chassis according to one of Claims 1 to 6, characterized in that the at least first spring device (20) is designed as a layer spring. Chassis according to one of Claims 1 to 7, characterized in that the at least first bearing device (16) is connected to a second spring device (21), the at least first spring device (20) via a first contact zone (28) of the at least first bearing device ( 16) is connected to the at least first bearing device (16) and the second spring device (21) is connected to the at least first bearing device (16) via a second contact zone (29) of the at least first bearing device (16), the first contact zone (28 ) is arranged opposite the second contact zone (29). Chassis according to Claim 1, characterized in that the at least first spring device (20) protrudes into the at least first opening (30) and is arranged in contact with the first cover (31). Chassis according to Claim 1 or 9, characterized in that the at least first opening (30) is provided in the first belt (23) or in the second belt (24). Chassis according to one of Claims 1 to 10, characterized in that at least one stop (34) is provided between the first carrier (4) and the at least first spring device (20).

Images