EP0792784B1 - Driving device for a railway vehicle and railway vehicle provided with at least one of such driving device - Google Patents

Abstract

The drive device has a drive motor (2) supported on a drive axis via a bearing arrangement (6). A pinion (414) is connected to the motor shaft. A gear (3) contains a toothed wheel (15) connected to the drive axle (5) and to be coupled to the pinion (14). A gear housing (27) supported on the drive axle (5) and the motor housing (12) contains the toothed wheel (15) and the pinion (14). The bearing arrangement (6) and the motor housing (12) each have an extension associated respectively with the toothed wheel or the pinion. The gear housing contains a first connection part (31) fixedly connectable to one of the extensions and a second connection part movable connectable to the other extension. A sealing support arrangement (34) which can be bent back in the radial and/or axial direction is inserted between the first and second connection parts to support the second.

Description

The invention relates to a drive device according to the preamble of claim 1.

In one known from CH-PS 609 290 Rail vehicle with drive devices of the above Kind are the drive motors each with two approaches their housing arranged bearings on the associated Drive axle supported, which is rotatable in these bearings and axially slidably mounted and with a gear connected is. The gear is with one on the Motor shaft attached pinion in the axial direction flexibly coupled and with this in one Gearbox arranged, which on the drive motor attached and axially displaceable on the drive axis is stored. Such drive devices with each the drive axle unsprung supported drive motor require a relatively high manufacturing and Assembly effort to the given in the chassis, in usually confined space for maintenance and maintenance work easily accessible drive assembly to achieve a low-loss transmission of the Drive power as well as a secure attachment and Sealing of the gear housing guaranteed.

The invention has for its object a further developed especially in this regard Drive device of the type mentioned, in one compact, simple design to create which Relative movements of the interacting drive parts and / or a compensation of construction tolerances Drive device allows and easy access to both the gearbox and the interacting drive parts for assembly, disassembly and maintenance work guaranteed.

This object is achieved by the im characterizing part of claim 1 specified Features resolved.

The embodiment according to the invention allows one functional separation of those in the area of the first Approach part trained, in the axial and in the radial Direction of the fixed support arrangement from that in the area of the second extension part, in axial and in radial direction compliant support assembly which the Relative movements of the occurring during operation interacting parts without affecting the Allows power transmission. It can Gear housing in the form of an external force largely free, correspondingly thin-walled formwork be carried out, which is characterized by a simple, low-cost design and what with relatively simple sealing arrangements against that Motor housing and the drive axle is sealable.

Embodiments of the invention are in the dependent Claims specified.

A rail vehicle with at least one Drive device designed according to the invention Subject matter of claim 10.

Fig.1

eine erfindungsgemäss ausgebildete Antriebseinrichtung für ein Schienenfahrzeug, in einer Teildraufsicht mit einem horizontalen Teilschnitt,

Fig.2

eine Seitenansicht der Antriebseinrichtung mit einem Teilschnitt entsprechend der Linie II - II in Fig.1,

Fig.3

eine Einzelheit der Antriebseinrichtung in einem Teilschnitt entsprechend der Linie III - III in Fig.1, in einer grösseren Darstellung,

Fig.4

eine Einzelheit der Antriebseinrichtung in einem Teilschnitt entsprechend der Linie IV -IV in Fig. 2 in einer grösseren Darstellung,

Fig.5

eine Einzelheit V aus Fig. 1 in einer grösseren Darstellung,

Fig.5a,b

weitere Einzelheiten V, je in einer anderen Ausführungsform,

Fig.6

ein Getriebegehäuse einer Antriebseinrichtung in einer abgewandelten Ausführungsform, in einem Schnitt entsprechend der Darstellung nach Fig. 2, und

Fig.7

eine Seitenansicht eines Schienenfahrzeugs mit erfindungsgemäss ausgebildeten Antriebseinrichtungen.

The invention is explained on the basis of exemplary embodiments shown schematically in the drawing. Show it:

Fig. 1

a drive device designed according to the invention for a rail vehicle, in a partial top view with a horizontal partial section,

Fig. 2

2 shows a side view of the drive device with a partial section along the line II-II in FIG. 1,

Fig. 3

1 shows a detail of the drive device in a partial section along the line III - III in FIG. 1, in a larger representation,

Fig. 4

2 shows a detail of the drive device in a partial section along the line IV-IV in FIG. 2,

Fig. 5

1 shows a detail V from FIG. 1 in a larger representation,

Fig.5a, b

further details V, each in a different embodiment,

Fig. 6

a gear housing of a drive device in a modified embodiment, in a section corresponding to the illustration of FIG. 2, and

Fig. 7

a side view of a rail vehicle with drive devices designed according to the invention.

According to Figure 1 is a wheelset 1 of a rail vehicle provided with a drive device that a Drive motor 2 and a transmission 3 comprises. The wheel set 1 contains one connected to two rail wheels 4 Drive axis 5, the ends of which are not shown in FIG lateral axle bearings are stored. The drive motor 2 is with the motor axis running parallel to the drive axis 5 arranged and via a bearing arrangement 6 on the Drive axis 5, and via a movable holding arrangement 7 supported on a support part 8 of the rail vehicle. The support part 8 can on a not shown Bogie frame to be formed on the lateral axle bearings is supported. The bearing arrangement 6 contains a bearing housing 10 in which the drive shaft 5 is rotatably and axially displaceably mounted on which connecting flanges 11 are formed, on which the housing 12 of the drive motor 2 by means of screws 13 is attached. The gear 3 contains one on the shaft the drive motor 2 fixed pinion 14 and a so meshing gear 15, which with its hub 16 on the Drive shaft 5 is attached. The pinion 14 and the gear 15 can also have at least one, not shown Interacting idler gear.

The motor housing 12 is in with a from the motor plate projecting axially over the pinion 14, Free-standing support part 17 provided to the a free-standing bracket at its free end 18 for an outer bearing 20, which on the Motor housing 12 side facing away from the pinion 14 arranged and for receiving one with the pinion 14 connected shaft end 21 is determined. The support part 17 is in the embodiment shown on the motor plate releasably attached by means of screws 22. With others Embodiments can with a corresponding support part welded, glued or to the motor plate in be cast in one piece. The support part 17 is as ring segment-shaped shell 23, which the Surrounds pinion 14 at a radial distance and over a Extends circumferential portion which is substantially through the Engagement area of the cooperating with the pinion 14 Gear 15 determined and by the circumference of the gear 15 is limited. The shell 23 is with a pinion 14 essentially concentrically enclosing peripheral wall executed which with the pinion 14 one of a Lubricating oil / air mixture flow-through interior limited. The peripheral wall is in several Offset circumferentially against each other, outwards radially projecting longitudinal ribs 24 and at least in arranged part of the peripheral portion Passage openings 25 provided which the interior the shell 23 with a partial space surrounding the shell 23 26 one surrounding the gear 15 and the support part 17 Connect the gearbox 27.

The gear housing 27 is in the form of a casing executed, which consists of two parts 27a and 27b, which in a single, as shown by the Axes of the drive axis 5 and the pinion 14 extending Parting plane E by means of screws 28 with each other and with the Bearing housing 10 are detachably connected. The bearing housing 10 and the motor housing 12 are each one against Gear 15 and the pinion 14 protruding first and second extension part 10a or 12a with a cylindrical seat. The Gear housing 27 contains a drive motor 2 facing, first side wall 30, in which one on the first attachment part 10a of the bearing housing 10 attachable first Connection part 31 and one on the second extension part 12a of the Drive motor 2 loosely attachable second connection section 32 are formed, and one of the drive motor 2 second side wall 30a facing away, in which a hub 16 third connecting part 33 loosely surrounding the gear wheel 15 is trained. As in particular from FIG. 1 emerges, the gear housing 27 is a between the second attachment part 12 a and the second connection part 32 sealable, resilient support assembly 34 am Motor housing 12 in the radial and / or axial direction kept agile and about one in the third Connection part 33 provided sealing arrangement 33a with the hub 16 of the gear 15 radially and axially movable coupled. According to another embodiment, a corresponding seal arrangement 33a also directly between the connecting part 33 and the drive shaft 5 be arranged. That is largely from external forces Free gear housing 27 can thus be advantageous in one lightweight thin-walled construction, which easy handling for assembly and Disassembly work permitted. The gear housing 27 can as a simple sheet metal or plastic construction or as a light metal cast construction be executed, the second Sidewall 30a as shown in the region of the pinion 14 a the bracket 18 and the outer bearing 20th Receiving local bulge 30b, so that outside of this area there is enough space for other units, e.g. one dash-dotted in Figure 1 indicated braking device 35, remains free.

As can be seen in particular from FIG. 5, the Support arrangement 34 one on the second extension part 12a Slidable inner guide ring 36, one with the Connection section 32 mergable outer Guide ring 37 and one between the rings 36 and 37 arranged, connected to them, e.g. vulcanized, intermediate ring 38 from one rubber-elastic material. Between the connection section 31 and the second extension part 12a or between the inner Guide ring 36 and the second extension part 12a, and between the outer guide ring 37 and the connecting part 32 are sealing elements in the form of O-rings 40 provided, each in a in the first or second attachment part 10a or 12a or circumferential groove 41 formed in the outer ring 37 can be arranged.

There are numerous embodiments of the support arrangement 34 possible. According to FIG. 5a, an immediate between the second attachment part 12 a and the connection part 32 sealingly inserted intermediate ring 39 rubber-elastic material as a support arrangement 34 be provided. According to a further embodiment 5b, the support arrangement 34 can be an intermediate the guide rings 36 and 37 arranged Ring spring element 47 and one with the guide rings 36 and 37 sealed bellows 48 included.

It is understood that one in the manner described executed and arranged gear housing 27 also in Connection with a gearbox with a floating bearing Pinion can be provided, in which case the bulge 30b is unnecessary. Furthermore, in deviation from the embodiment shown, the drive shaft 5 in Bearing housing 10 may also be axially fixed, so that there are no axial relative movements between Drive shaft 5 and drive motor 2 or between the Gear 15 and the pinion 14 and between the hub 16th and the second side wall 30a of the transmission case 27 may occur.

In the embodiment shown with in the outer bearing 20 stored pinion 14 is a much cheaper Stress in the area of the tooth mesh achievable as for versions with overhung pinion; in particular occur on the pinion 14 during operation much smaller deformations because the Deflection of the motor shaft carrying the pinion 14, and thus a corresponding inclination of the engaged located teeth of the pinion 14 kept so small can be that a relatively low load on the interacting tooth flanks by surface pressure achieved and the gearing with a corresponding small, across the tooth width "Longitudinal crowning" can be performed. Corresponding can narrow gears 15 and Pinion 14 with appropriate weight and Cost savings are used and therefore, given a given Space for the gearbox, increased performance and torque transmission can be achieved. In particular with larger gear ratios or small ones The diameter of the pinion 14 used is larger specific power transmission achievable.

In rail vehicles with high drive power can the gear housing 27 for the flow through a relatively large amount - e.g. 100 l / sec. or more - des provided lubricating oil / air mixture. At Versions with a relatively narrow gear 15 and pinion 14 can the corresponding amount of lubricant / air be reduced compared to previous versions, so that correspondingly lower hydraulic losses occur and thus a better efficiency of the Gear is achieved. A particular advantage of Version described above with in the outer bearing 20th stored pinion 14 is that with short-term Overloads, e.g. for drive devices with the so-called GTO ("gate turn-off") technology operated three-phase motors as a result of an electrical Short circuit in the motor or with a corresponding one Protective shutdown occur, the risk of tooth breakage can be significantly reduced. This is especially true for so-called "Tatzlagerantriebe" according to the Representation according to Figure 1, wherein the drive axis 5 and the Motor shaft can be coordinated so that their bending lines at least approximately under load run parallel to each other, and thus also at maximum load a very low, practical negligible difference angle between the two Bending lines exist.

The pinion 14 can be designed in any way and e.g. with a cylindrical or conical press fit be attached to the motor shaft. Can be used as a press fit e.g. an adhesive-shrunk connection is also provided his. In other embodiments, the pinion 14 in Form one in an inner cone of the motor shaft end attachable pinion running or, after a another embodiment, by a directly on the Motor shaft attached teeth are formed.

Another advantage of the arrangement described is in that the outer bearing 20 regardless of the diameter the motor shaft, i.e. for one with one smaller diameter stub shaft 21 can be interpreted. As a result of that shown in the Execution achievable due to favorable bearing load which is essentially across the width of the bearing a uniform, even load distribution achieved relatively long life of the outer bearing 20 become. The outer bearing 20 is also for Bearing inspections easily accessible and can be done easily Way, without disassembling the drive motor 2, replaced become.

Because of the outer bearing of the pinion 14 achievable exact guidance of the motor shaft, can at execution shown a between the transmission and the motor shaft to be provided seal, not shown trained as a run-flat camp and in the as an attachment part 12a trained motor shield can be arranged. The Emergency run bearings can be equipped with one or more sensors Monitoring the respective status, e.g. of Temperature, vibrations and relative movements of the Motor shaft in the sealing gap.

The distance from the support member 17 and from the External storage of the pinion 14 arranged, and thus of Bearing forces free gear housing 27 allows one functional separation between the fixed Attachment to the bearing housing 10 and in the radial and resilient support on the axial direction second attachment part 12a of the drive motor 2. This enables one structurally particularly simple design and sealing as well as easy installation and removal of the Gear housing 27 with large permissible construction tolerances, which a free exchange of the drive components and a simple, clear delimitation of the scope of delivery and the responsibilities between the engine and the Allow gearbox manufacturers.

The supporting part 17 designed with longitudinal ribs 24 can do so be interpreted that he the bearing reactions permanently absorbs and at the same time a desired rigidity having. Accordingly, those in the above described, short-term overloads occurring Shocking moments, which in normal operation too transmitting drive torque many times over exceed, added without damaging the gearbox become. In the embodiment shown with a so-called "sliding bearing drive", i.e. with in Tatzlagerehäus 10 rotatable and axially displaceable stored drive shaft 5, the support member 17 and that Gear 14 dimensioned so that the gear 15 each relative to the maximum sliding path in the axial direction to set the pinion 14.

The support part 17 can at the same time as Oil trap can be formed, through which a Oil supply for lubrication and cooling of the outer bearing 20 and the area of engagement between gear 15 and pinion 14 can be created. As especially from the Figures 2 and 4 shows the top two Longitudinal ribs 24 with the shell 23 and one in the area of Bracket 18 formed wall section 42 a tub 43rd form, in each of which a part of the in the subspace 26 located lubricating oil and caught in the Bracket 18 provided holes 44 the outer bearing 20th can be supplied. According to another embodiment can also the wall section 42 through a peripheral portion one which does not surround the holder (18) in a ring cross rib shown to be formed. Another part of the lubricating oil can in the to the tub 43rd adjoining upper peripheral regions of the shell 23 caught by the longitudinal ribs 24 and by the corresponding passage openings 25 in the pinion 14 surrounding interior of the shell 23 are guided. Due to the in the lower peripheral regions of the shell 23 trained through openings 25, the lubricating oil can be removed from the interior of the shell 23. By the passage openings 25 can thus equalize pressure between the interior of the shell 23 and the shell 23 surrounding subspace 26 of the transmission housing 27 is achieved and thus an overload of the between the Motor housing 12 and the motor shaft seal located be avoided.

As can be seen in particular from FIGS. 3 and 4, within the shell 23 a the lower peripheral portion of the pinion 14 surrounding, additional catch shell 45 for the lubricating oil can be provided as an immersion bath for the Pinion 14 is formed. Accordingly, the Starting, especially when starting under full load longer downtimes, each with a quick oil supply to the meshing area of the gear 15 and the pinion 14 be ensured.

According to FIG. 6, the gear housing 27 can also be equipped with a in the area of the pinion 14 undivided housing section executed and in a through the drive axis 5 running parting plane E 'divided, which with the through the axes of the drive shaft 5 and the pinion 14 certain reference plane any angle of inclination, as shown, an angle N = approx. 45 °, includes.

The rail vehicle according to FIG. 7 contains one Vehicle body 51 with two rotary positions 52, each have two wheel sets 1. The wheel sets 1 are each with a drive device designed according to the invention connected, which is a drive motor 2 and a transmission 3 includes.

In summary, the invention can be summarized as follows describe:

The drive device contains a drive motor 2 a pinion 14 which is connected to a drive shaft 5 attached gear 15 meshes. The motor housing 12 is on supported a bearing housing 10 in which the Drive shaft 5 is rotatably and axially displaceably mounted. The gear 15 and the pinion 14 are in one Gear housing 27 arranged, one side wall 30th attached to the bearing housing 10 and the motor housing 12 in resiliently supported radial and / or axial direction , and the other side wall 30a with a one Hub portion 16 of the gear 15 surrounding Seal arrangement 33a is provided. The engine case 12 is with a support member projecting beyond the pinion 14 17 provided, which on the motor housing 12th opposite side of the pinion 14 an outer bearing 20 for a shaft end 21 connected to the pinion 14 wearing. The gear housing 27 free of bearing forces can in a light, by simple sealing arrangements 33a, 40 sealable construction. By the outer bearing of the pinion 14 can deform in Tooth mesh area can be minimized.

Claims (10)

1. Drive arrangement for a rail vehicle, with a drive motor (2), which is supported on a driving shaft by way of a bearing arrangement (6) and has a pinion (14) connected to the motor shaft, with a transmission (3), which includes a gearwheel (15) that is to be coupled to the pinion (14) and is connected to the driving shaft (5), and with a transmission housing (27) that can be supported on the driving shaft (5) and the motor housing (12) and surrounds the gearwheel (15) and the pinion (14), characterized in that the bearing arrangement (6) and the motor housing (12) are embodied with a first and a second extension piece (10a and 12a respectively) associated respectively with the gearwheel (15) and the pinion (14), in that the transmission housing (27) includes a first connecting part (31), which can be connected in a fixed manner to the one, first extension piece (10a), and a second connecting part (32), which can be coupled in a moveable manner to the other, second extension piece (12a), and in that a supporting arrangement (34), which can be inserted in a sealing manner between the second extension piece (12a) and the second connecting part (32) and can yield in the radial and/or axial direction, is provided for the second connecting part (32).
2. Drive arrangement according to Claim 1, the transmission housing (27) of which has a first side wall (30) facing the drive motor (2) and a second side wall (30a) facing away from the drive motor (2), characterized in that the two connecting parts (31, 32) are formed on the first side wall (30) and in that the second side wall (30a) is provided with a sealing arrangement (33a) that surrounds the driving shaft (5) or a hub part (16) of the gearwheel (15).
3. Drive arrangement according to Claim 1 or 2, characterized in that the yielding supporting arrangement (34) comprises an inner guide ring (36), which can be mounted on the second extension piece (12a), an outer guide ring (37), which can be fitted to the second connecting part (32) of the transmission housing (27), and an intermediate ring (38) made of a rubber-elastic material, arranged between these guide rings (36 and 37), and in that respective sealing elements (40) are provided between the inner guide ring (36) and the second extension piece (12a) and between the outer guide ring (37) and the second connecting part (32).
4. Drive arrangement according to one of the preceding claims, characterized in that the motor housing (12) is provided with a supporting part (17) that projects beyond the pinion (14) in the axial direction and, on the opposite side of the pinion (14) from the motor housing (12), has a holding device (18) for an outer bearing (20) intended to receive a shaft stub (21) connected to the pinion (14), and in that the transmission housing (27) is embodied in such a way that, in its operational position of installation, it surrounds the outer bearing (20) and the supporting part (17) with a clearance in each case.
5. Drive arrangement according to Claim 4, characterized in that the supporting part (17) comprises a shell (23) in the form of an annular segment that surrounds the pinion (14) with a radial clearance and extends over a region of the circumference that is delimited essentially by the circumference of the gearwheel (15) interacting with the pinion (14)
6. Drive arrangement according to Claim 5, characterized in that the shell (23) is embodied with an essentially cylindrical circumferential wall, which is provided with outward-projecting longitudinal ribs (24) offset from one another in the circumferential direction and with a plurality of through-openings (25) that passes through at least part of the circumferential wall and connect the interior space of the shell (23) containing the pinion (14) to a component space (26) that surrounds the shell (23) and belongs to the transmission housing (27).
7. Drive arrangement according to one of Claims 4 to 6, characterized in that the supporting part (17) includes a lubricant-collecting shell (45) that surrounds a lower circumferential section of the pinion (14) and is designed as a splash-lubrication bath for the pinion (14).
8. Drive arrangement according to one of Claims 4 to 7, characterized in that, in the region of the outer bearing (20), the transmission housing (27) is embodied with a local bulge (30b) that accommodates the said bearing.
9. Drive arrangement according to one of the preceding claims, characterized in that the transmission housing (27) comprises two parts (27a, 27b), which are connected releasably to one another in a single parting plane (E, E').
10. Rail vehicle with at least one drive arrangement according to one of the preceding claims.

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