DE102018128858A1 - Air spring arrangement for a secondary suspension of a low-floor rail vehicle, car body and rail vehicle with air spring arrangement - Google Patents

Abstract

An air spring arrangement is proposed for a secondary suspension of a low-floor rail vehicle with a car body, which has a bogie connection and an adjoining low-floor area, the air spring arrangement having: a pressure container arrangement (10), which provides a compressed air volume for a secondary suspension of a low-floor rail vehicle, whereby the pressure vessel arrangement can be fastened in the low-floor area (31) of the rail vehicle, and a connecting line (20) for connecting an air spring of the secondary suspension to the compressed air volume of the pressure vessel arrangement (10), the connecting line (20) bridging the low-floor area (31) to the bogie connection (30) . A car body and a rail vehicle are also proposed.

Description

Technical field

The invention relates to an air spring arrangement for the suspension of a low-floor rail vehicle, in particular the invention relates to an air spring arrangement for a secondary suspension between the car body and the bogie of a rail vehicle.

Prior art

A rail vehicle is usually sprung in different ways to increase safety and comfort. A primary suspension and a secondary suspension are usually provided for a high level of comfort and the associated high level of acceptance of rail transport by passengers and train drivers. The suspension between the wheel sets and the bogie is taken over by the primary suspension. The primary suspension is usually implemented by leaf springs, but also by coil springs or rubber springs.

The secondary suspension is used for the suspension between the bogie and the body. Coil springs are also used, but air springs are increasingly used. A secondary suspension for a bogie can include, for example, two or more air springs.

The secondary suspension generally has one or more so-called additional volumes, which are connected to the actual air spring volume via connecting lines. When connecting an additional air volume to an air spring, an additional air tank and corresponding supply line are used. These additional air volumes serve to increase the compressible air volume of the air springs and thus to increase the flexibility of the air springs.

Low-floor rail vehicles are especially trams for inner-city traffic. Low-floor rail vehicles are characterized in particular by a low height of the interior floor in relation to the vehicle surroundings. In contrast to other designs, in the low-floor construction the interior floor is not positioned above the vehicle chassis, but rather, for example, by car bodies lowered between the axles. In the classic construction, a passenger often had to climb several steps into the vehicle. In the low-floor construction, the height difference between the vehicle floor and the platform is realized, for example, by a single step or slope. Low-floor rail vehicles offer a solution for barrier-free access, for example for prams and wheelchairs.

Disadvantages of the prior art

The previous solutions for attaching additional volumes for the air suspension lead to problems if the space under the low-floor rail vehicle is limited. For example, the low-floor area can be limited by a maximum length. The passenger compartment should also be used to a maximum for the accommodation of passengers. The limited space creates difficulties in housing the air spring assembly or other components of the rail vehicle.

Problem

It is therefore an object of the present invention to provide an air spring arrangement for a secondary suspension of a low-floor rail vehicle which improves the use of space on the bogie, the vicinity of the bogie in the vicinity and / or the area under the low-floor car body.

Solution according to the invention

This object is achieved by an air spring arrangement, a car body with an air spring arrangement and a rail vehicle with an air spring arrangement. Further embodiments, modifications and improvements are apparent from the following description.

According to one embodiment, an air spring arrangement for a secondary suspension of a low-floor rail vehicle with a car body, which has a bogie connection and an adjoining low-floor area, is proposed. The air spring arrangement comprises a pressure container arrangement which provides a compressed air volume for a secondary suspension of a low-floor rail vehicle, the pressure container arrangement being attachable in the low-floor area of the rail vehicle, and a connecting line for connecting an air spring of the secondary suspension to the compressed air volume of the pressure container arrangement, the connecting line connecting the low-floor area to the bogie connection bridged.

The air spring arrangement according to embodiments of the invention allows a space-saving solution for accommodating the pressure container arrangement by fastening the air spring arrangement in the low-floor area of the rail vehicle. The connecting line connects an air spring of a secondary suspension to the compressed air volume of the pressure vessel arrangement. The connecting line thus forms a pressure channel from the pressure vessel arrangement in the low-floor area to the bogie connection of the car body.

In previous solutions, a distance of, for example, 2 m is provided between a pressure container arrangement and the air spring, since the pressure container arrangement is fastened to a suitable installation space. This is particularly less suitable for rail travel displays where the low-floor area is limited to a maximum length. The pressure vessel arrangement of the embodiment described herein advantageously begins close to the air spring.

Low-floor rail vehicles are characterized by a low height of the car floor above the top edge of the rail. The height of the continuous carriage floor and the entry area relative to the top edge of the rail can vary slightly or be graded. The height of the continuous carriage floor above the top edge of the rail is, for example, less than 1000 mm and is in particular in the range from approximately 300 mm to 700 mm. The low-floor construction also includes the "lowest-floor" construction (English: Ultra Low Floor). Low-floor rail vehicles are, in particular, trams for local urban transport. These can have a maximum speed of 70 km / h, for example.

The bogie connection is the area of a car body that is placed on a bogie, hung or otherwise connected to the bogie. For example, the bogie connection can have a bogie crossbar that is placed on the bogie and holds the car body. The connection between the body and the bogie can be turned. The low-floor area and the bogie connection can be part of a single car body or adjacent parts or modules of a rail vehicle.

At the bogie connection between a bogie and car body, a secondary suspension is arranged, which includes, for example, two secondary air springs. The connecting line establishes a pressure connection between the secondary air spring or springs and the pressure container arrangement on the car body. As a result, the bogie can be rotated relative to the air spring arrangement.

The air spring arrangement according to the embodiments described here permits efficient use of the low-floor area, which is usually free there, by placing the compressed-air tank below the low-floor area of the car body, which is lowered between the bogie connections, and thereby enables the installation space in the vicinity of the turntable to be released for other installation devices. Pressure volumes for secondary springs therefore do not necessarily have to be attached to the bogie, but can be provided there if necessary. As a result, the pressure vessel arrangement is typically not mounted on the bogie but on the car body.

The pressure vessel arrangement can be fastened in particular under the floor in the low-floor area of the rail vehicle. Underfloor means below the load-bearing structure of the car body, i.e. between the load-bearing structure and the rail. The pressure vessel arrangement can additionally be protected, for example, by a cover made of sheet metal or similar from dirt and contact with small parts in the track bed. The height above the top edge of the rails is lower in the low-floor area than in the area of the bogie connections.

The pressure vessel arrangement can have fastening means for fastening pressure vessels in the low-floor area. According to one embodiment, the pressure vessels can be fastened in the low-floor area and in particular in the low-floor area by means of a tensioning strap or a clamp, for example an articulated strap bracket clamp (HRGKSM or HYDAC).

According to one embodiment, the pressure vessel arrangement can have at least one, and preferably several, pressure vessels. The pressure vessel or vessels can be in the form of an elongated tube, in particular with a length-diameter ratio, or a length-width ratio, of more than 8th , preferably more than 10th , be trained. Furthermore, the pressure vessel or vessels can be fastened parallel to a longitudinal direction of the rail vehicle. The shape of an elongated tube comprises a round cross section, that is, a cylindrical shape, but is not limited to this. An elongated tube can also have an elliptical or any other cross section. The orientation parallel to the longitudinal direction of the rail vehicle means the orientation of the long side of the elongated tube essentially parallel to the longitudinal direction of the rail vehicle.

According to one embodiment, the pressure vessel arrangement has at least two pressure vessels and each of the two pressure vessels is in the form of an elongated tube, in particular with a length-diameter ratio, or a length-width ratio, of more than 8th , preferably more than 10th , educated. The pressure vessels can be fastened parallel to a longitudinal direction of the rail vehicle. According to a further development, the pressure vessel arrangement can at least 4th , 6 or 8th Have pressure vessels and each of the 4th , 6 respectively 8th Pressure vessels can be used as an elongated tube, in particular with a length - diameter - or a length-width ratio of more than 8th , preferably more than 10th , be trained. The pressure vessels can be fastened parallel to a longitudinal direction of the rail vehicle.

According to one embodiment, the air spring arrangement can also contain further, additional pressure vessels of a different shape, which do not belong to the pressure vessel arrangement in the low-floor area. The additional pressure vessels preferably form less than half of the total compressed air volume. The additional pressure vessels can in particular be fastened along the connecting line, that is to say between the low-floor area and the bogie connection.

According to one embodiment, the pressure vessel arrangement can have one or more pressure vessels with an outer diameter according to DIN 5590: 1999-06, e.g. of 125 mm ± 3 mm, but of greater length, e.g. of approximately 4720 mm ± 10 mm. The connections or sockets of the pressure vessels can be designed in accordance with DIN 5590: 1999-06. These pressure vessels are just one possible concrete form of the aforementioned elongated tube.

According to one embodiment, the pressure container arrangement can provide at least two compressed air volumes for a first and a second secondary spring of a low-floor rail vehicle, that is to say the compressed air volumes are separated in this case and each assigned to a different secondary spring. Alternatively, the pressure volumes can also be brought together at one or more points and provide a common volume of compressed air for the first and second secondary springs.

The air spring arrangement can have a first and a second connecting line for connecting a first and a second air spring to the compressed air volume or volumes of the pressure container arrangement. In particular in the case of two compressed air volumes, the air spring arrangement can have a first and a second connecting line for connecting the first air spring and the second air spring of the secondary suspension to the two compressed air volumes.

The connecting line begins at the compressed air tank in the low-floor area and leads along the transition from the low-floor area to the higher-level bogie connection, under which the bogie is placed. In particular, the connecting line can run in sections parallel to the car body. Typically, the car body bends upwards from the low-floor area to the area of the bogie connection.

According to one embodiment, the compressed air volume comprises or the compressed air volumes together comprise at least 40 I, especially at least 80 I, which is provided as compressed air volume for a secondary suspension of the low-floor rail vehicle.

The pressure vessel arrangement can, for example, have a maximum height of less than 200 mm, in particular a maximum of about 175 mm. As a result, the pressure vessel arrangement can advantageously be arranged in a space-saving manner in the low-floor area and in particular in the under-floor area in the low-floor area. Not only the pressure vessels contribute to the maximum height, but also fasteners or devices for draining the pressure vessels. For example, pressure vessels have a jacket socket for drainage.

A car body or a car body module for a low-floor rail vehicle is furthermore proposed, which has a bogie connection and an adjoining low-floor area, the car body or the car body module having an air spring arrangement according to one of the above-described embodiments and the pressure container arrangement being fastened in the low-floor area.

According to a further development, the car body or the car body module can also have a second bogie connection adjacent to the low-floor area, and the car body or the car body module can furthermore have a further air spring arrangement in accordance with one of the above-described embodiments, the first and the second pressure vessel arrangement being fastened in the low-floor area. Different embodiments of the air spring arrangement can be combined in a car body or car body module.

A rail vehicle with an embodiment of the car body or the car body module is further proposed, the rail vehicle comprising: a first or a first and a second bogie and a first or a first and a second secondary spring in each case between the car body or the car body module and the bogies, the Connection lines each connect an air spring of the secondary suspensions to the compressed air volume of the pressure vessel arrangements.

Figure list

• 1A zeigt einen Ausschnitt eines Niederflur-Schienenfahrzeuges mit einer Luftfederanordnung gemäß einer hierin beschriebenen Ausführungsform.
• 1B zeigt ein Niederflur-Schienenfahrzeug ähnlich der 1 aus einer anderen Perspektive.
• 2A zeigt eine Luftfederanordnung gemäß einer hierin beschriebenen Ausführungsform.
• 2B zeigt die Luftfederanordnung der 2A aus einer anderen Perspektive.

The accompanying drawings illustrate embodiments and, together with the description, serve to explain, but are not limited to, the principles of the invention. The elements of the drawings are relative to one another and are not necessarily to scale. The same reference numerals designate similar parts.

• 1A shows a section of a low-floor rail vehicle with an air spring arrangement according to an embodiment described herein.
• 1B shows a low-floor rail vehicle similar to that 1 from a different perspective.
• 2A shows an air spring arrangement according to an embodiment described herein.
• 2 B shows the air spring assembly of the 2A from a different perspective.

The 1 shows a section of a low-floor rail vehicle with a body 100 and a bogie 101 . The car body 100 has a bogie connection 30th and an adjoining low-floor area 31 on. An air spring arrangement according to an embodiment described here is attached to the rail vehicle. The air spring arrangement has a pressure container arrangement 10th on, which provides a compressed air volume for a secondary suspension of the low-floor rail vehicle, the pressure vessel arrangement in the low-floor area 31 the rail vehicle is attachable. Furthermore, the air spring arrangement has a connecting line 20th for connecting an air spring of the secondary suspension to the compressed air volume of the pressure vessel arrangement 10th on, with the connecting line the low-floor area 31 for bogie connection 30th bridged. The one pressure vessel arrangement 10th The air spring arrangement is under the floor in the low-floor area 31 appropriate. The pressure vessel assembly 10th can be fastened, for example, by clamps.

2nd shows a section of a low-floor rail vehicle. In addition to the representation of the 1 is a door area 32 in the car body 100 in the low-floor area 31 indicated. The pressure vessel assembly 10th can be partially attached under a door area as shown.

In the 2nd it can be seen that the low-floor area 31 runs much closer to the rail edge than the bogie connection 30th . The connecting line 20th bridges this height difference when connecting the pressure vessel arrangement 10th with an air spring of the secondary suspension between the bogie connection 30th and bogie 101 . The connecting line preferably runs 20th along and parallel to the underbody of the car body 100 . The otherwise unused area under the actual car body can be advantageous 100 used to the air spring assembly on the car body 100 to arrange. The compressed air volume for the secondary suspension is therefore not on the bogie 101 but on the car body 100 arranged.

The air spring arrangement has additional pressure vessels 3rd , 4th on that not to the pressure vessel arrangement 10th belong in the low-floor area. The additional pressure vessels 3rd , 4th preferably form less than half of the total compressed air volume. The additional pressure vessels 3rd are along the connecting line 20th , i.e. at the transition between the low-floor area 31 and bogie connection 30th arranged. Alternatively, the additional pressure vessel 3rd , 4th also on the bogie connection 30th so above the bogie 101 be arranged.

The 2A and 2 B show an air spring arrangement in detail from two different perspectives. The bogie connection shown 30th is firmly connected to the rest of the car body, for example screwed or welded. Two air springs 1 , 2nd are also shown, which form the secondary suspension to a bogie.

The air spring arrangement has a pressure container arrangement 10th with six pressure vessels 11 , 12 , 13 , 14 , 15 , 16 on. The pressure vessel assembly 10th can, for example, according to different embodiments 2nd , 4th , 6 or 8th pressure vessel 11 , 12 , 13 , 14 , 15 , 16 exhibit. The pressure vessels 11 , 12 , 13 , 14 , 15 , 16 do not all have to have the same shape. However, they are preferably the same in order to be replaced as a wearing part with a new pressure vessel of the same type.

The pressure vessels 11 , 12 , 13 , 14 , 15 , 16 can be as an elongated tube, in particular with a length-diameter ratio, or length-width ratio, of more than 8th , preferably more than 10th , be trained. For example, the pressure vessels 11 , 12 , 13 , 14 , 15 , 16 standardized according to DIN 5590: 1999-06 and have an outside diameter of 125 mm and a length of 4720 mm. An elongated tube with a circle or an ellipse as the basic shape is admittedly favorable for the pressure absorption, but is not absolutely necessary. The base of the elongated tube can have any shape. The greatest width of the base area can be used to determine the length-width ratio.

The pressure vessels 11 , 12 , 13 , 14 , 15 , 16 according to one embodiment, are elongated tubes and parallel to a longitudinal direction of the rail vehicle in the low-floor area 31 attachable. This makes the otherwise unused space in the low-floor area 31 used. Due to the small distance between the top edge of the rail and the body, the maximum height of the pressure vessel arrangement is fixed at 175 mm, for example.

The connecting line 20th connects the pressure vessel assembly 10th with one of the air springs 1 , 2nd . The air spring arrangement can also have a first and a second connecting line 21st , 22 have the pressure vessel assembly 10th with the air springs 1 , 2nd connects. The connecting lines 21st , 22 have, for example, several pipes that run along the body of the low-floor area 31 up to the bogie connection 30th extend. The connecting line 20th or the connecting lines 21st , 22 can also use pipe couplings or pipe distributors to connect one or more pressure vessels 11 , 12 , 13 , 14 , 15 , 16 exhibit. At the bogie connection 30th is the connecting line 20th or are the connecting lines 21st , 22 with air springs 1 , 2nd connectable and provide the air spring pressure volume there. The length of a connecting line 20th , 21st , 22 from the pressure vessel assembly 10th to an air spring or from the low-floor area 31 up to the bogie connection 30th is for example between 1 m and 4 m and in particular between 2 m and 3 m.

The compressed air volume for the secondary suspension can be at least 40 I, especially at least 80 I, include. A compressed air volume for an air spring of the secondary suspension advantageously comprises at least 40 I, especially at least 80 I. Secondary suspensions often have two air springs, so the total compressed air volume of the pressure vessel arrangement then 80 I and in particular 160 I includes. A pressure vessel 11 , 12 , 13 , 14 , 15 , 16 the pressure vessel arrangement 10th For example, a print volume of 20th I provide. The air spring assembly can have additional pressure vessels 3rd , 4th have, in particular in the transition area between the low-floor area 31 and bogie connection 30th can be arranged. These can each have an additional print volume of, for example, between 20th I and 30th I provide.

The air spring assembly can be with a car body 100 or a car body module for a low-floor rail vehicle can be combined, the one or the bogie connection 30th and an adjoining low-floor area 31 has, wherein the pressure vessel assembly 10th in the low-floor area 31 is attached. The car body 100 or the car body module can also have a second bogie connection 30 ' then to the low-floor area 31 exhibit and the car body 100 or the car body module can furthermore have a further air spring arrangement, the first and the second pressure container arrangement 10th , 10 ' in the low-floor area 31 is attached. The air spring arrangements can then be mirrored relative to one another or fastened to the car body in a rotated manner. Alternatively, they can also be different embodiments of the air spring arrangement.

According to one embodiment, a rail vehicle with a car body 100 or car body module proposed with a first or a first and a second bogie 101 , 101 ' . The rail vehicle has a first or a first and a second secondary suspension with one or more air springs 1 , 2nd each between the body 100 or car body module and the bogies 101 , 101 ' on, the connecting line 20th or the connecting lines 21st , 21 ' one air spring each 1 , 2nd of the secondary suspensions, each with the compressed air volume of the pressure vessel arrangements 10th connect.

Claims (14)

Air spring arrangement for a secondary suspension of a low-floor rail vehicle with a car body (100) which has a bogie connection (30) and an adjoining low-floor area (31), the air spring arrangement having: a pressure container arrangement (10) which provides a compressed air volume for a secondary suspension of a low-floor rail vehicle, the pressure container arrangement being attachable in the low-floor area (31) of the rail vehicle, and a connecting line (20) for connecting an air spring of the secondary suspension to the compressed air volume of the pressure vessel arrangement (10), the connecting line (20) bridging the low-floor area (31) to the bogie connection (30). The air spring arrangement after Claim 1 , The pressure vessel arrangement (10) can be fastened underfloor in the low-floor area (31) of the rail vehicle. The air spring arrangement according to one of the preceding claims, wherein the pressure container arrangement (10) has at least one pressure container (11) and the pressure container (11) as an elongated tube, in particular with a length - diameter - or length-width ratio of more than 8, preferably more than 10, and the pressure vessel (11) can be fastened parallel to a longitudinal direction of the rail vehicle. The air spring arrangement according to one of the preceding claims, wherein the pressure vessel arrangement (10) has at least two pressure vessels (11, 12) and each of the two pressure vessels (11, 12) as an elongated tube, in particular with a length - diameter - or length-width ratio of more than 8, preferably more than 10, and the pressure vessels (11, 12) can be fastened parallel to a longitudinal direction of the rail vehicle. The air spring arrangement after Claim 4 , wherein the pressure vessel arrangement (10) has at least 4 pressure vessels (11, 12, 13, 14) and at least one of the pressure vessels (11, 12, 13, 14) is designed as an elongated tube, in particular with a length - diameter - or length-width ratio of more than 8, preferably more than 10, and the pressure vessels (11, 12, 13, 14) can be fastened parallel to a longitudinal direction of the rail vehicle. The air spring arrangement after Claim 5 , wherein two of the pressure vessels (11, 12) can be connected to a first air spring via a first connecting line (21) and the other two pressure vessels (13, 14) can be connected to a second air spring via a second connecting line (22), the first and the second connecting line (21, 22) each bridge the low-floor area (31) to the bogie connection (30). The air spring arrangement according to one of the preceding claims, wherein the pressure container arrangement (10) provides at least two compressed air volumes for a first and a second secondary spring of a low-floor rail vehicle. The air spring arrangement according to one of the preceding claims, wherein the air spring arrangement has a first and a second connecting line (21, 22) for connecting a first and a second air spring to the compressed air volume or volumes of the pressure container arrangement (10). The air spring arrangement according to one of the preceding claims, wherein the compressed air volume or the compressed air volumes together comprise at least 40 I, in particular at least 80 I. The air spring arrangement according to one of the preceding claims, wherein the maximum height of the pressure vessel arrangement is 175 mm. The air spring arrangement according to one of the preceding claims, wherein the pressure container arrangement (10) has one or more pressure containers (11, 12, 13, 14, 15, 16) according to DIN 5590: 1999-06 (outer diameter 125mm, length 4720mm). Vehicle body (100) or vehicle body module for a low-floor rail vehicle, which has a bogie connection (30) and an adjoining low-floor area (31), comprising an air spring arrangement according to one of the preceding claims, wherein the pressure container arrangement (10) in the low-floor area (31) is attached. Body (100) or a body module after Claim 12 , wherein the car body (100) or the car body module has a second bogie connection (30 ') adjacent to the low-floor area (31) and the car body (100) or the car body module further has a further air spring arrangement according to one of the Claims 1 to 11 The first and the second pressure vessel arrangement (10, 10 ') are fastened in the low-floor area (31). Rail vehicle with a body (100) or body module after Claim 12 or 13 , further comprising a first or a first and a second bogie (101, 101 ') and a first or a first and a secondary suspension with one or more air springs (1, 2) each between the body (100) or body module and the bogies (101 , 101 '), the connecting line or the connecting lines (21, 21') each connecting an air spring (1, 2) of the secondary suspensions to the compressed air volume of the pressure vessel arrangements (10).

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