WO2013013899A1

WO2013013899A1 - Bogie improved for railed system vehicles

Info

Publication number: WO2013013899A1
Application number: PCT/EP2012/061832
Authority: WO
Inventors: Ahmet Civan
Original assignee: Durmazlar Makina Sanayi Ve Ticaret Anonim Sirketi
Priority date: 2011-07-27
Filing date: 2012-06-20
Publication date: 2013-01-31
Also published as: TR201107418A2

Abstract

The subject matter invention is a bogie which is used in railed system vehicles and which has at least two carrier frames (20a, 20b) where each one comprises a carrier part (30, 40) and a beam (50) and which are hinged to each other by means of the related connection points (333, 433) through said beams (50), characterized in that said beams (50) extend at a non¬ linear direction towards the carrier parts (30, 40) so that said connection points (333, 433) exist on the same extension axis (x).

Description

SPECIFICATION

BOGIE IMPROVED FOR RAILED SYSTEM VEHICLES TECHNICAL FIELD

The present invention relates to a bogie which is flexible in order to decrease the tensions, which the railed system vehicles are subject to, during the movement of the railed system vehicles on a non-linear path.

PRIOR ART

Because of the traffic problems which are particularly faced in big cities, railed systems are used in a more widespread manner. Railed systems can be classified as light rail systems, heavy rail systems, automatic systems, single rail systems and magnetic levitation systems. Among said systems, vehicles have wheels except the magnetic levitation system; and vehicles are moved on the rails using the wheels. In local transportation, mostly light rail systems are used and less frequently heavy rail systems are used. As an example to the light rail systems, trams and light subway trains can be given as example. These railed systems move on rails at the ground level or on raised roads and mostly they use streets. In light rail systems, on the rails, there is a single vehicle or there are vehicles which are in connection to each other in short sequences.

In local transportation, all of the railed system vehicles, which have wheels, comprise wheel groups, body, bogie and suspension systems placed in between. Bogie, which is among the components forming railed system vehicles, realizes the most important function for the dynamics of the vehicle. The bogie provides the wheel movements and at the same time it carries the remaining components of the vehicle. Besides, the most important function of the bogie is to provide flexibility in the structure by eliminating the rigid structure existing between the wheel axle shafts and the body during the non-linear movements of vehicles or during the movements of vehicles on the deformed rails.

By means of the flexibility provided to the structure by the bogies, the vibrations of the vehicle are decreasing and the comfort of the vehicle increases both for the passengers and also for the operator. Moreover, the load applied to the chassis is decreased thanks to the flexibility of the structure and thereby the metal fatigue is minimized, and the abrasions occurring in the rails and in the wheels are decreased and the risk of derailing is decreased. Bogies can be classified in two classes, namely, classical bogies and improved bogies. Classical bogies comprise a rigid frame and thus they cannot provide the flexible structure required for the railed system vehicles which particularly move on non-linear paths. The improved bogies have various designs, and the most important difference between the improved bogies and the classical bogies is that the improved bogies comprise two frame pieces and these pieces are connected to each other by means of flexible members.

In the patent applications US6082766A and FR2769277A1 , a bogie is described with two separate frames which are connected to each other by flexible connection members and thereby which provide flexibility to the structure. In said inventions, the centers of the points where two frame pieces forming the bogie are connected are eccentric with respect to each other. This provides bogie flexibility; however, this may be insufficient for the flexibility of the light rail system vehicles like tram which moves between streets in the city and which realize turning with a big angle, and this may lead to abrasions on the rails and on the wheels in time. In the patent application WO2009144515A1 , a bogie is described which is formed by connecting two frames to each other by means of connection members. In this bogie, although the centers of the connection points are approached to each other, in some cases, sufficient flexibility cannot be provided because of eccentricity. As a result, because of the abovementioned problems, an improvement is required in the related technical field.

BRIEF DESCRIPTION OF THE INVENTION The present invention relates to a bogie which is improved for providing the required flexible structure by decreasing the tensions which the railed system vehicles are subject to during the movements thereof, in order to eliminate the abovementioned problems and to bring new advantages to the related technical field. The main object of the present invention is to provide a bogie which provides high level of flexibility to the vehicle structure in order to be used in light rail system vehicles like tram which is used in local transportation and which moves on non-linear rails.

Another object of the present invention is to provide a bogie which is improved for preventing metal fatigue occurring in railed system vehicles in time and which is improved for decreasing the risk of derailing. Another object of the present invention is to provide a bogie which is improved for providing long-lasting usage by minimizing the metal fatigue in railed system vehicles.

Another object of the present invention is to provide a bogie which is improved for decreasing the damage which occurs in the vehicles and in the rails because of floor seating.

Another object of the present invention is to provide a two-piece bogie so as to be symmetrical to each other in order to facilitate production. In order to realize all of the abovementioned objects and the objects which are to be obtained from the detailed description below, the present invention is a bogie which is used in railed system vehicles and which has at least two carrier frames where each one comprises a carrier part and a beam and which are hinged to each other by means of the related connection points through said beams. Accordingly, said bogie is characterized in that said beams extend at a non-linear direction towards the carrier parts so that said connection points exist on the same extension axis.

In a preferred embodiment of the subject matter invention, said beam comprises a diagonal part in order to define the extension direction.

In another preferred embodiment of the subject matter invention, said beam comprises a starting part and an end part, embodied so as to extend at two sides of said diagonal part and extending at a linear direction towards the carrier parts. In another preferred embodiment of the subject matter invention, said beam comprises a bending point which separates the starting part and the diagonal part in order to define the diagonal part; and another bending point which separates the end part and the diagonal part.

In another preferred embodiment of the subject matter invention, said starting part comprises a connection extension which provides the connection thereof at the connection point.

In another preferred embodiment of the subject matter invention, said end part comprises a connection surface; and a connection member which is related to said connection point and which is connected on said connection surface.

In another preferred embodiment of the subject matter invention, the beams are positioned between the carrier parts so that the inner edges thereof will face each other. In another preferred embodiment of the subject matter invention, said connection member is a connection pin.

In another preferred embodiment of the subject matter invention, said carrier parts comprise a pin housing which is embodied at the connection points thereon and which provides the placement of the connection pins.

In another preferred embodiment of the subject matter invention, said carrier parts comprise a connection bar where the pin housings exist.

In another preferred embodiment of the subject matter invention, said connection bar comprises an assembly region where said connection extension is placed.

In another preferred embodiment of the subject matter invention, said assembly regions exist in a crosswise position with respect to each other on the carrier parts which are positioned mutually.

In another preferred embodiment of the subject matter invention, said beams extend so as to complete each other between the carrier parts.

In another preferred embodiment of the subject matter invention, said carrier frames are embodied so as to be symmetrical with respect to each other.

In another preferred embodiment of the subject matter invention, the width of said starting part is bigger than the width of the end part.

In another preferred embodiment of the subject matter invention, the beams are positioned so that there is a distance narrower than the narrowest part of the beam in between. BRIEF DESCRIPTION OF THE FIGURES

In Figure 1 , the general view of subject matter bogie is given.

In Figure 2, the top perspective view of the subject matter bogie is given.

In Figure 3, the lateral perspective view of the subject matter bogie is given. In Figure 4, the detailed view of the subject matter bogie is given.

REFERENCE NUMBERS 10 Bogie

20a Carrier Frame

20b Carrier Frame

30 Carrier Part

31 Motor Housing

32 Hanger Bar

33 Connection Bar

331 Pin Housing

332 Assembly Region

433 Connection Point

40 Carrier Part

41 Motor Housing

42 Hanger Bar

43 Connection Bar

431 Pin Housing

432 Assembly Region

433 Connection Point

50 Beam

51 Starting Part

51 1 Connection Extension

52 Diagonal Part

521 Bending Point

522 Bending Point

53 End Part

531 Connection Surface

532 Connection Pin

54 Inner Edge

55 External Edge

60 Primary Suspension

70 Secondary Suspension

A: Pin Housing Center

B: Pin Housing Center

wi : Starting Part Width w₂: End Part Width

a: Distance Between the Beams

x: Connection Pin Extension Axis THE DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the subject matter bogie (10) is explained with references to examples without forming any restrictive effect in order to make the subject more understandable.

The bogie (10), whose general view is given in Figure 1 , comprises two carrier frames (20a, 20b) which are positioned mutually and which are connected to each other. Said carrier frames (20a, 20b) comprise carrier parts (30, 40) and beams (40) which are connected to each other in a substantially orthogonal manner. Said carrier frames (30, 40) comprise a motor housing (31 , 41 ). In said carrier parts (30, 40), there is a hanger bar (32, 42) which exists at the rear part of the motor housing (31 , 41 ) and a connection bar (33, 43) which exists at the front part of the motor housing (31 , 41 ). Said beam (50) is connected on said connection bar (33, 43). By means of these beams (50), the carrier frames (20a, 20b) are provided to be connected to each other. Moreover, there are the secondary suspensions (70) at the upper ends of the carrier parts (30, 40); and there are the primary suspensions (60) at the lower ends thereof. Said suspensions (60, 70) provide damping of the loads applied on the bogie (10).

The connection bar (33, 43) has a pin housing (331 , 341 ) at the middle point thereof. In one of the connection bars (33), there is an assembly region (332) which is embodied at one side of the pin housing (331 ) and in the other of the connection bars (43), there is an assembly region (432) which is embodied at the other side of the pin housing (431 ). The position of said pin housings (331 , 341 ) on the connection bar (33, 43) defines a connection point (333, 433). The beams (50) are provided to be connected to the connection bars (33, 43) through said assembly regions (332, 432). When the carrier parts (30, 40) are connected to each other, these assembly regions (332, 432) are positioned in a crosswise manner with respect to each other.

The beams (50) comprise three main parts namely, the starting part (51 ), the diagonal part (52) and the end part (53). There is a connection extension (51 1 ) at said starting part (51 ). Said connection extension (51 1 ) is connected to the assembly region (332, 432) on the connection bar (33, 43). At the continuation of the starting part (51 ), said diagonal part (52) extends. At the continuation of the diagonal part (52), said end part (53) exists. The region where the end part (53) ends defines a connection surface (531 ) and a connection pin (532) is connected on said connection surface (531 ). Said connection pin (532) provides the carrier parts (30, 40) to be connected to each other by means of beams (50). The lateral parts of the beam (50) define an inner edge (54) and an external edge (55) depending on the position of the beam (50) on the connection bar (53). On said external edges (55), there are two bending points (521 , 522) which determine the passage from the starting part (51 ) to the diagonal part (52) and from the diagonal part (52) to the end part (53) and which define the diagonal part (52) in this manner.

The connection points (333, 433), existing on the connection bars (33, 43), in other words, the centers of the pin housings (331 , 431 ) are represented by points A and B. The centers (A, B) of said pin housings exist on the same axis. Since the centers (A, B) of the pin housings are on the same axis, the extension axis (x) of the connection pins placed to the pin housings (331 , 431 ) is the same. Thus, the connection of the beams (50) to the carrier parts (30, 40) is realized through the same axis.

The mutual positioning and the interconnection of the carrier parts (30, 40) in order to form the bogie (10) are as follows. As can be seen in Figure 2, the carrier parts (30, 40) are positioned mutually so that the pin housings (331 , 431 ) exist in the x axis. The assembly regions (332, 432) of the mutually positioned carrier parts (30, 40) exist in the crosswise positions with respect to each other. Thus, the beams (50), which are placed to the assembly regions (332, 432), exist in the crosswise positions with respect to each other. The connection pins (532), existing on the beams (50), are placed to the pin housings (323, 341 ). In this manner, the carrier parts (30, 40) are provided to be connected to each other.

In the connection of the carrier parts (30, 40), the beams (50) are positioned side by side between the carrier parts (30, 40), and the distance between the beams is equal to "a" in the horizontal plane. The connection pins (532), existing on the beams (50), are connected in the inner edge (54) side and thus when the connection pins (532) are placed to the pin housings (331 , 341 ), said inner edges (54) are positioned so as to face each other and so as to complete each other. The beams (50) are positioned so as to complete each other, since they have a symmetric structure. The bending points (521 , 522), which exist in the beams (50) and which define the diagonal part (52), have an effect on the formation of this symmetrical structure. When the connection pins (532) are placed to the pin housings (331 , 341 ), the starting parts (51 ) and the end parts (53) adjoin and they are positioned so as to make a certain angle with respect to the x axis. This angle, which the beams (50) make with the x axis, is provided by the diagonal part (52) which exists in the structures thereof and which provide an inclined form to the beams (50). By means of the diagonal part (52), the connection pins (532) of the beams (50) are provided to exist on the same x axis. In the beams (50), the width (w-i) of the starting part is smaller than the width (w₂) of the end part. If the width (w-i) of the starting part is bigger, this provides a stronger connection with the connection extensions (51 1 ) and a more resistant bogie (10) structure, particularly during the connection of the beams (50) to the assembly regions (332, 432). In the subject matter bogie (10), the beams (50) are exactly the same and symmetric with respect to the each other. This provides an easier and a more economic production step since the same standard pieces are produced. Since the beams (50) exist on the same axis (x), the structure of the railed system is more flexible. Particularly in non-linear rails or in the rail deteriorations resulting from floor seating, the movement abilities of the wheels is better since the beams (50) and thus the pin connection points (333, 433), where the beams (50) are connected, exist in the same axis (x). The subject matter railed system vehicle is preferably a low floored tram. Since flexibility is provided to the tram, metal fatigue is decreased and the loads, applied to the chassis and to the wheel axle shafts, are decreased. Thus, in the railed system vehicle, increase is obtained in the passenger and driver comfort, and at the same time, the vehicles can be provided to have a longer life.

The protection scope of the present invention is set forth in the annexed Claims and cannot be restricted to the illustrative disclosures given above, under the detailed description. It is because a person skilled in the relevant art can obviously produce similar embodiments under the light of the foregoing disclosures, without departing from the main principles of the present invention.

Claims

A bogie which is used in railed system vehicles and which has at least two carrier frames (20a, 20b) where each one comprises a carrier part (30, 40) and a beam (50) and which are hinged to each other by means of the related connection points (333, 433) through said beams (50), characterized in that said beams (50) extend at a non-linear direction towards the carrier parts (30, 40) so that said connection points (333, 433) exist on the same extension axis (x).

A bogie (10) according to Claim 1 , characterized in that said beam (50) comprises a diagonal part (52) in order to define the extension direction.

A bogie (10) according to Claim 1 or Claim 2, characterized in that said beam (50) comprises a starting part (51 ) and an end part (53), embodied so as to extend at two sides of said diagonal part (52) and extending at a linear direction towards the carrier parts (30, 40).

A bogie (10) according to any one of the preceding claims, characterized in that said beam (50) comprises a bending point (521 ) which separates the starting part (51 ) and the diagonal part (52) in order to define the diagonal part (52); and another bending point (522) which separates the end part (53) and the diagonal part (52).

A bogie (10) according to Claim 1 , characterized in that said starting part (51 ) comprises a connection extension (51 1 ) which provides the connection thereof at the connection point (333, 433).

A bogie (10) according to Claim 1 , characterized in that said end part (53) comprises a connection surface (531 ); and a connection member (532) which is related to said connection point (333, 433) and which is connected on said connection surface (551 ).

A bogie (10) according to Claim 1 , characterized in that the beams (50) are positioned between the carrier parts (30, 40) so that the inner edges thereof (54) will face each other.

A bogie (10) according to Claim 6, characterized in that said connection member is a connection pin (532).

9. A bogie (10) according to Claim 1 , characterized in that said carrier parts (30, 40) comprise a pin housing (331 , 431 ) which is embodied at the connection points thereon (333, 433) and which provides the placement of the connection pins (532).

10. A bogie (10) according to any one of the preceding claims, characterized in that said carrier parts (30, 40) comprise a connection bar (33, 43) where the pin housings (331 ,

431 ) exist.

11 . A bogie (10) according to Claim 10, characterized in that said connection bar (33, 43) comprises an assembly region (332, 432) where said connection extension (51 ) is placed.

12. A bogie (10) according to Claim 1 1 , characterized in that said assembly regions (332,

432) exist in a crosswise position with respect to each other on the carrier parts (30, 40) which are positioned mutually.

13. A bogie (10) according to any one of the preceding claims, characterized in that said beams (50) extend so as to complete each other between the carrier parts (30, 40).

14. A bogie (10) according to any one of the preceding claims, characterized in that said carrier frames (20a, 20b) are embodied so as to be symmetrical with respect to each other.

15. A bogie (10) according to any one of the preceding claims, characterized in that the width (w-i) of said starting part is bigger than the width (w₂) of the end part.

16. A bogie (10) according to any one of the preceding claims, characterized in that the beams (50) are positioned so that there is a distance (a) narrower than the narrowest part of the beam (50) in between.