EP3310636B1 - Drive arrangement for a rail vehicle, rail vehicle with a drive arrangement and method for producing the drive arrangement and the rail vehicle - Google Patents

Description

The invention relates to a drive arrangement for a rail vehicle and a rail vehicle with a drive arrangement. In particular, the rail vehicle is a light rail vehicle, such as a tram. The invention further relates to methods of manufacturing the drive assembly and the rail vehicle.

The invention particularly relates to low-floor rail vehicles, in particular light low-floor rail vehicles. The bottoms of the passenger compartments of such rail vehicles are not above the height level or even below the height level of the axes of rotation of the wheel disks of the bicycles of the rail vehicle, in particular in the outer door area between the bogies at a height level. There is thus little room for the traction motors of the rail vehicle.

Such as EP 1 197 412 A2 describes, an external longitudinal drive can be provided, ie the longitudinal axis of the rotor of the traction motor extends in the direction of travel or substantially in the direction of travel and the traction motor is arranged outside the space between the wheel discs of a wheelset. In other words, the drive shaft extends outside approximately parallel to the longitudinal members of the bogie, which extend in the longitudinal direction of the vehicle, ie approximately in the direction of travel in particular between two sets of wheels of the bogie. Such longitudinal drives usually have a bevel gear. The disadvantage of this is the complexity of the transmission and the resulting in particular at higher speeds noise with a high sound level. The traction motor is therefore designed for relatively low maximum speeds. This in turn leads to a relatively large weight and space.

Also possible are traction motors with running in the vertical direction rotor and drive shaft, which can be arranged in the region of the transitions between different car bodies of the rail vehicle. The disadvantage of this is the complexity of the transmission, via which the drive energy is introduced by the traction motor in the wheelset.

In addition, the traction motor in the area above a wheel disc of a wheelset, e.g. be arranged below the seats of vehicle seats. However, this requires due to the height of the transmission a separate oil pump with a corresponding risk of failure.

In the aforementioned drives for low-floor rail vehicles, the moving masses and resting masses of the drives are relatively large. Since at least parts of the drive as the transmission, depending on the version but also the traction motor on the bogie, be attached, suspended or supported, the bogie itself must be carried out accordingly stable and therefore usually heavy and bulky.

In addition to the already mentioned concepts of the arrangement of the traction motor, it is also already known to provide a transverse drive, in which the longitudinal axis of the rotor and thus the drive shaft of the motor runs parallel or approximately parallel to the longitudinal axis of the axle. For example disclosed WO 2011/141510 A1 several variants of the attachment or coupling of such a transverse drive to a bogie.

EP 3 034 375 A1 (not before published) describes a bogie with a frame having two side members, two cross members, two axle structures, each having two axle bearings and a transverse axle and extending in the transverse direction between two ends and each support a wheel. The wheels define an interior space between them which is defined in the transverse direction between the wheels on the same axle shaft and limited longitudinally between the two axle shafts. At least one motor supported by at least one of the cross members of the frame is disposed in the interior space. There are provided a clutch shaft of the engine and at least one reducing agent. The reducing agent is arranged outside the interior. The clutch shaft of the engine extends from the engine to beyond the corresponding carrier to the reducing agent.

It is an object of the present invention to provide a drive assembly and a rail vehicle having such a drive assembly that provides space for other structural members and other features of the rail vehicle enlarge and in particular allow the use of a traction motor with low volume and weight. A further object of the invention is to provide methods for producing a drive arrangement and a rail vehicle with which these goals can be achieved.

According to a basic idea of the present invention, it is proposed to integrate a traction motor of the rail vehicle drive into a supporting structure of a bogie. At least a part of the supporting structure of the bogie thus fulfills two functions, namely on the one hand to take up at least a part of the weight of the rail vehicle and to transfer at least one wheel set to the rails and on the other hand to contain at least a partial volume of the traction motor. The term of containing the sub-volume or volume refers to the volume of the supporting structure of the bogie, which is defined by the envelope surfaces of the volume. At least a partial volume of Traction motor is located within these envelope surfaces. In particular, the supporting structure of the bogie has a recess or a cavity, which thus lies within the envelope surfaces and in which at least part of the traction motor is received.

In this way, the construction volume required outside of the supporting parts of the bogie for the traction motor is reduced. Furthermore, at least the integrated into the bogie portion of the drive motor is protected by parts of the bogie from external influences, such as shocks. Thereby, e.g. a housing of the traction motor space-saving (eg., With less housing wall thickness) are performed or even at least a part of the housing are omitted. In other words, the supporting structure of the bogie can form at least a part of the motor housing.

It is also proposed to drive the drive assembly with a transverse drive, i. the longitudinal axis of the traction motor, in the direction of the mechanical drive energy is transmitted from the engine to the wheel or the wheel set, transverse to the direction of travel of the rail vehicle, in particular parallel or approximately parallel to a Radsatzwelle or a virtual axis, the centers of the wheels of a Wheelset connects. The longitudinal axis of the rotor of the traction motor therefore extends in particular in the horizontal direction, e.g. when the rail vehicle is moving on a track that is not inclined to the right or left while driving. This is usually the case when driving straight ahead.

The transverse drive allows the use of a transmission that makes do with the transmission of drive energy from the motor drive shaft to the wheel or the wheelset without bevel gears. In particular, the drive assembly may therefore have a spur gear, wherein the traction motor during operation couples the drive energy via a drive shaft of the spur gear in this. In particular, the drive shaft and an output shaft of the spur gear can run parallel to the wheelset shaft or said virtual wheelset axle. It is also possible that the wheel set shaft is the output shaft of the spur gear or the wheelset shaft and the drive shaft are coaxial with each other.

A spur gear has over a bevel gear the advantage of a smaller, construction volume, for this reason a lower mass with similar materials and lower noise at the same speeds. A spur gear also has the advantage that a multi-stage gear can be realized in a simple manner, which in turn are large ratios of the rotational speeds of the drive shaft and output shaft of the transmission with low noise possible. Multi-stage helical gearboxes, but also one-stage helical gearboxes are therefore suitable for building drives with low weight and high gear ratios. This in turn makes it possible to operate the traction motor at higher speeds and therefore, run at the same drive power, with a smaller volume. This, in turn, facilitates integration of the traction motor into the supporting structure of the bogie, i. a major portion or all of the traction motor may be within the envelope of the bearing portions of the bogie.

An advantage of the space savings both by the at least partial integration of the traction motor in the supporting structure of the bogie as well as by using a spur gear is that the lateral projection of components of the drive assembly can be reduced to the outside compared to other drive assemblies with external parts. This advantage is in particular over known arrangements in which the drive motor is completely outside of the longitudinal beams of the supporting structure of the bogie. In particular, when cornering this reduces the width of the clearance gauge of the vehicle at the height of the bogie. Also for the provision of sufficient space in which can move over the bogie sprung parts of the rail vehicle, this clearance is beneficial. In addition, by the at least partial integration into the bogie clearance for the construction of a low-floor rail vehicle exists. This applies in particular to transitions between different car bodies of the rail vehicle, which are usually arranged in the bogies.

In particular, in bogie constructions with running in the direction of travel of the rail vehicle side rails on the opposite sides right and left in the direction of travel of the traction motor can be fully or partially integrated in a recess and / or a cavity of a longitudinal member / be. This has the advantage that the spur gear in close proximity to the traction motor on the side rail can be arranged / can be. The drive shaft of the spur gear can therefore be particularly short, which weight and cost can be saved.

In particular, the side rail may have a recess extending from the outside of the bogie into the side rail, and e.g. has a closed circumferential edge. Preferably, the shape and size of the closed peripheral edge is matched to the shape and size of the outer circumference of the traction motor such that the stator of the traction motor is at least partially received in the recess and thereby on different sides of the outer periphery in contact with the edge of the recess is. The edge of the recess holds the stand and thus the traction motor therefore in the stop position.

The recess may extend into the interior of the longitudinal member but not through it. In this way there is a stop for the insertion of the traction motor into the recess, which is e.g. is formed by the rear wall of the recess. However, it is preferred that the recess extends through the longitudinal member. This increases the space for the inclusion of the traction motor and a part of the traction motor can also be located on the inside of the longitudinal member.

Alternatively or additionally, at least a partial volume of the traction motor can be integrated into a cross member of the bogie. The cross member extends (in straight travel of the rail vehicle) in the horizontal direction. The use of a cross member has the advantage that in the direction of the greatest length of the cross member, i. in the transverse direction, sufficient space for the arrangement of the traction motor, in particular the entire length of the traction motor is available.

Alternatively or in addition to the volume or sub-volume of the traction motor, a portion of a cooling device for cooling the traction motor may be integrated during its operation into the supporting structure of the bogie. In particular, a fan of the cooling device for cooling an air flow may at least partially be integrated into the supporting structure of the bogie. Alternatively or additionally, a portion of a coolant line of the cooling device for guiding a flow of cooling fluid can be integrated into the supporting structure of the bogie. Further alternatively or additionally, a coolant pump the cooling device for driving a cooling liquid flow at least partially integrated in the supporting structure of the bogie / be. Further alternatively or additionally, a heat exchanger for transferring heat of a cooling liquid to the supporting structure and / or to the environment of the supporting structure may at least partially be integrated into the supporting structure of the bogie.

In particular, cooling fluid conduits may run within the supporting structure, e.g. from the traction motor via conduits within a longitudinal beam and / or cross member of the supporting structure optionally via a cooling liquid pump integrated in the supporting structure and optionally via an additional heat exchanger for recooling the cooling fluid back to the traction motor.

In all these cases, the at least partial integration of the cooling device results in a free space available for other structural elements and other devices of the rail vehicle.

If both at least a partial volume of the traction motor and at least a partial volume of the cooling device for cooling the traction motor during its operation is integrated into the supporting structure of the bogie, components of the cooling device can be saved. In particular, the integration of at least one part of the cooling device makes it possible to dissipate the heat generated during operation of the traction motor via the supporting structure of the bogie. The supporting structure can therefore be used in particular as a heat exchanger for transmitting heat of an engine coolant to the ambient air.

In particular, a part of the cooling device, for example the additional heat exchanger, the coolant pump and / or the fan, can be introduced into a recess of a longitudinal member of the supporting structure of the bogie. For this recess, in particular, the same applies as was done above for the recess for introducing the traction motor. In particular, both a recess for the traction motor and at least one recess for the part of the cooling device can be provided. In particular, the traction motor and / or at least part of the cooling device can be introduced into a side member of the supporting structure.

• eine tragende Konstruktion eines Drehgestells,
• einen Traktionsmotor mit einem Ständer und einem Läufer und
• ein Getriebe zur Übertragung von Antriebsenergie des Traktionsmotors auf zumindest einen Radsatz des Drehgestells,

wobei die Antriebsanordnung als Querantrieb ausgestaltet ist, zumindest ein Teilvolumen des Traktionsmotors in die tragende Konstruktion integriert ist, das Getriebe ein Stirnradgetriebe ist, wobei eine Antriebswelle des Stirnradgetriebes mit dem Läufer des Traktionsmotors gekoppelt ist und eine Abtriebswelle des Stirnradgetriebes an zumindest ein Rad des Radsatzes ankoppelbar oder angekoppelt ist.In particular, it is proposed: A drive arrangement for a rail vehicle, comprising:

• a load-bearing construction of a bogie,
• a traction motor with a stand and a runner and
• a transmission for transmitting drive energy of the traction motor to at least one wheelset of the bogie,

wherein the drive assembly is configured as a transverse drive, at least a partial volume of the traction motor is integrated into the supporting structure, the transmission is a spur gear, wherein a drive shaft of the spur gear is coupled to the rotor of the traction motor and an output shaft of the spur gear to at least one wheel of the wheelset can be coupled or docked.

In particular, in one of the embodiments described in this specification, the drive assembly may be part of a rail vehicle.

• ein Getriebe zum Übertragen von Antriebsenergie auf ein Rad oder einen Radsatz eines Drehgestells unmittelbar und/oder über einen Traktionsmotor an einer tragenden Konstruktion des Drehgestells abgestützt wird und
• ein Läufer des Traktionsmotors mit einer Antriebswelle des Getriebes gekoppelt wird,

wobei die Antriebsanordnung als Querantrieb ausgestaltet wird, zumindest ein Teilvolumen des Traktionsmotors in die tragende Konstruktion integriert wird und als Getriebe ein Stirnradgetriebe verwendet wird.It is also proposed: A method for producing a drive arrangement for a rail vehicle, in particular an embodiment of the drive arrangement, which are described in this description, wherein:

• a transmission for transmitting drive energy to a wheel or a wheel set of a bogie is supported directly and / or via a traction motor on a supporting structure of the bogie and
• a rotor of the traction motor is coupled to a drive shaft of the transmission,

wherein the drive arrangement is designed as a transverse drive, at least a partial volume of the traction motor is integrated into the supporting structure and a spur gear is used as the transmission.

In particular, in the manufacture of a railway vehicle, a drive assembly may be made in any of the configurations described in this specification.

In particular, an axis of rotation of the rotor about which the rotor rotates during operation of the traction motor, and the drive shaft of the spur gear in the horizontal direction. This refers to the case that the rail vehicle at a Operation of the drive assembly moves straight in the rail vehicle. In particular, it is therefore also possible to let an output shaft of the spur gear also run with its axis of rotation in the horizontal direction. The drive energy transmission from the traction motor to a wheel or a wheelset therefore takes place in particular exclusively by rotational movements about horizontally extending axes of rotation. A reversal of rotational movements (as in bevel gearboxes) is therefore not required.

As mentioned above, the supporting structure of the bogie may have a longitudinal beam extending in one direction of travel during operation of the rail vehicle, the volume or sub-volume of the traction motor being integrated in the side rail. In this case, a favorable, at least partially balanced weight distribution can be achieved, in particular in the following manner: The load-bearing construction of the bogie has a right-hand side, which is located on a right side in the direction of travel when operating the rail vehicle, and a left-side region , which is located on the left in the direction of travel during operation of the rail vehicle. The drive arrangement has a first and a second traction motor, wherein at least a partial volume of the first traction motor is integrated into the right-side area and at least a partial volume of the second traction motor is integrated in the left-side area. In particular, the first traction motor and the second traction motor may each be coupled via a spur gear with at least one wheel of the bogie / be. In particular, the overall arrangement of the two traction motors and the two spur gear can, viewed from above, be punctiform symmetrical to a center on the central longitudinal axis of the rail vehicle. This longitudinal axis runs in the direction of travel of the rail vehicle. In other words, the arrangement of the first traction motor with the coupled thereto first spur gear is arranged point-symmetrical to the arrangement of the second traction motor with the second spur gear coupled thereto.

Fig. 1

eine Draufsicht auf ein Drehgestell mit zwei Antriebsanordnungen,

Fig. 2

eine Seitenansicht des in Fig. 1 dargestellten Drehgestells und

Fig. 3

eine stirnseitige Ansicht des in Fig. 1 und Fig. 2 dargestellten Drehgestells von der rechts in Fig. 1 und von der rechts in Fig. 2 liegenden Seite.

Embodiments of the invention will now be described with reference to the accompanying drawings. The individual figures of the drawing show:

Fig. 1

a top view of a bogie with two drive assemblies,

Fig. 2

a side view of the in Fig. 1 shown bogies and

Fig. 3

a frontal view of the in Fig. 1 and Fig. 2 shown bogie from the right in Fig. 1 and from the right in Fig. 2 lying side.

This in Fig. 1 shown bogie 1 has two sets of wheels 2a, 2b and 2c, 2d, wherein the wheels 2a and 2b and 2c and 2d each rotatably connected to each other via a wheelset 3a, 3b, ie rotate with the exception of elasticity-related torsions about the axis of rotation of the wheelset the wheels and the wheelset synchronously about the axis of rotation.

The wheel set shafts 3a, 3b are each coupled via two pivot bearings not shown with the supporting structure of the bogie 1. The supporting structure has in the illustrated embodiment, two side members 5a, 5b and a cross member 4. The longitudinal members 5a, 5b extend with their longitudinal axis, in Fig. 1 from left to right, in the direction of travel of the rail vehicle. The cross member 4 connects the longitudinal members 5a, 5b in their central longitudinal section with each other. As a result, an H-shaped supporting structure of the bogie 1 is achieved. However, the invention is not limited to such a supporting structure of a bogie. Rather, other, already known bogie constructions for the integration of the traction motor and / or the cooling device can be used. In the embodiment of Fig. 1 are the pivot bearing for supporting the wheelset shafts 3a, 3b in the opposite end longitudinal sections of the side members 5a, 5b.

In the side members 5a, 5b, a traction motor 7a, 7b is partially integrated in each case. Further, in each of the side rails 5a, 5b, a cooling device 9a, 9b for cooling one of the traction motors 7a, 7b partially integrated. In the exemplary embodiment, each of the longitudinal members 5a, 5b in each of the two longitudinal sections, which extend on both sides of the connection to the cross member 4 in the direction of the pivot bearing, a recess which extends from the outside (top and bottom in Fig. 1 ) extend into the interior of the longitudinal member 5a, 5b. The recess for the second traction motor 7b is in Fig. 2 denoted by the reference numeral 6b. The recess for the second cooling device 9b is in Fig. 2 denoted by the reference numeral 8b. At least the recesses 8 for the cooling devices 9a, 9b extend through the side members 5a, 5b through to the inside. They thus form a two-sided open housing for receiving the cooling device 9. Optionally, this is also the case for the recesses 6 for the traction motors 7. In the exemplary embodiment, the traction motor 7 or the cooling device 9 protrude out of the recess on the outside.

The view of the first longitudinal member 5a from the outside, ie from above in Fig. 1 is similar to the view of the second longitudinal member 5b, the in Fig. 2 is shown. Therefore, the overall arrangement of the motors 7a, 7b (and also the transmission, which will be discussed in more detail) point-symmetrical to the center P of the cross member ( Fig. 1 ). In this way, the weight distribution is balanced. There are on the right and the left side of the vehicle about the same size masses.

Each of the traction motors 7a, 7b has a drive shaft which is part of the rotor. The rotor 12b of the second traction motor 7b is in Fig. 1 shown schematically with broken lines. It is coupled to the drive shaft 13b (also shown schematically with dashed lines) of the associated spur gear 11b, which is located on the outside of the longitudinal member 5b. The second spur gear 11b has (as shown schematically lower right in FIG Fig. 1 also shown with dashed lines) to an output shaft 14b, which is coupled to the second Radsatzwelle 3b. Therefore, during operation of the second traction motor 7b, drive energy is transmitted to the second wheel set shaft 3b via the second spur gear 11b, and thus the wheel set is driven by the wheels 2c and 2d. For the coupling of the first traction motor 7a to the associated spur gear 11a on the outside of the first longitudinal member 5a applies accordingly.

In the frontal view of the Fig. 3 are the gear 11 a and 11 b au ßenseitig right and left in Fig. 3 recognizable because they project further to the side than the traction motors. In the side view of Fig. 2 is the second gear 11b with the schematically indicated drive shaft 13b and output shaft 14b recognizable.

In the cooling device 9a, 9b, which is partially integrated in the side members 5a, 5b, is in the illustrated embodiment, a heat exchanger for recooling the cooling liquid. A coolant pump that circulates coolant in a coolant circuit, not shown, can also in the Bogie be integrated. Coolant conduits therefore run, for example, respectively from the traction motor 7a, 7b within the longitudinal member 5a, 5b via the coolant pump and via the heat exchanger back to the traction motor 7a, 7b. The cooling liquid circuits in the various side members 5a, 5b are separated from each other in the embodiment. Already without an additional heat exchanger, due to the integration of the cooling liquid lines in the respective longitudinal members 5a, 5b, a heat transfer of the cooling liquid heated by the traction motor 7a, 7b to the material of the longitudinal member 5a, 5b takes place. Therefore, the longitudinal beams 5a, 5b acts as a heat exchanger to the surrounding air. During the journey of the rail vehicle, air usually flows turbulently over surfaces of the longitudinal member 5a, 5b, so that it is effectively cooled by the air. Optionally, a fan may additionally be provided, which causes an additional air flow along surfaces of the longitudinal member and along the surface of protruding from the side member 5a, 5b partial volume of the traction motor 7a, 7b, especially at low speeds of the rail vehicle.

Claims (12)

1. A drive system for a rail vehicle, comprising:

   • a supporting structure of a bogie (1);

   • a traction motor (7a, 7b) comprising a stator (15a, 15b) and a rotor (12b); and

   • a gear mechanism for transmitting driving energy of the traction motor (7a, 7b) to at least one wheelset (2a, 2b, 2c, 2d) of the bogie (1),

   the drive system being designed as a transverse drive, the gear mechanism being a spur gear mechanism (11a, 11b), an input shaft (13b) of the spur gear mechanism (11a, 11b) being coupled to the rotor (12b) of the traction motor (7a, 7b), and an output shaft (14b) of the spur gear (11a, 11b) being couplable or coupled to at least one wheel (2d) of the wheelset (2a, 2b, 2c, 2d),
   characterized in that
   at least a partial volume of the traction motor (7a, 7b) is integrated into the supporting structure of the bogie (1).
2. The drive system according to claim 1, wherein a rotational axis of the rotor (12b), about which the rotor (12b) rotates during operation of the traction motor (7a, 7b), and the input shaft (13b) of the spur gear mechanism (11a, 11b) extend in horizontal direction when the rail vehicle drives straight ahead during operation of the drive system in the rail vehicle.
3. The drive system according to claim 1 or 2, wherein a cooling device (9a, 9b) for cooling the traction motor (7a, 7b) is at least partially integrated into the supporting structure of the bogie (1).
4. The drive system according to claim 3, wherein a fan of the cooling device for generating an air flow is at least partially integrated into the supporting structure of the bogie (1).
5. The drive system according to claim 3 or 4, wherein at least a section of a coolant line of the cooling device for conducting a coolant flow is integrated into the supporting structure of the bogie (1).
6. The drive system according to any one of claims 3 to 5, wherein a coolant pump of the cooling device (9a, 9b) for driving a coolant flow is at least partially integrated into the supporting structure of the bogie (1).
7. The drive system according to any one of claims 1 to 6, wherein the supporting structure of the bogie (1) comprises a longitudinal beam (5a, 5b) extending in a driving direction during operation of the rail vehicle, and the volume or partial volume of the traction motor (7a, 7b) is integrated into the longitudinal beam (5a, 5b).
8. A drive system according to any one of claims 1 to 7, wherein the supporting structure of the bogie (1) comprises a right-side region that, during operation of the rail vehicle, is located on a side situated on the right in the driving direction, and a left-side region that, during operation of the rail vehicle, is located on a side situated on the left in the driving direction, the drive system comprising a first (7a) and a second (7b) traction motor, at least a partial volume of the first traction motor (7a) being integrated into the right-side region and at least a partial volume of the second traction motor (7b) being integrated into the left-side region, and the first traction motor (7a) and the second traction motor (7ab) each being coupled by way of a spur gear mechanism (11a, 11b) to at least one wheel (2a, 2b, 2c, 2d) of the bogie (1).
9. A rail vehicle, comprising a drive system according to any one of claims 1 to 8, wherein the output shaft of the spur gear mechanism (11a, 11b) is coupled to at least one wheel (2b, 2d) of the wheelset.
10. A method for producing a drive system for a rail vehicle, in particular the drive system according to any one of claims 1 to 9,

    • a gear mechanism for transmitting driving energy to a wheel (2b, 2d) or a wheelset (2a, 2b, 2c, 2d) of a bogie (1) being supported directly and/or by way of a traction motor (7a, 7b) on a supporting structure of the bogie (1), and

    • a rotor (12b) of the traction motor (7a, 7b) being coupled to an input shaft of the gear mechanism,

    the drive system being designed as a transverse drive, and a spur gear mechanism (11a, 11b) being used as the gear mechanism,
    characterized in that
    at least a partial volume of the traction motor (7a, 7b) is integrated into the supporting structure of the bogie (1).
11. The method according to claim 10, wherein a cooling device (9a, 9b) for cooling the traction motor (7a, 7b) is at least partially integrated into the supporting structure of the bogie (1).
12. A method for producing a rail vehicle, wherein a drive system of the rail vehicle is produced according to claim 10 or 11.

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