EP3504097B1 - Wheel assembly for a rail vehicle - Google Patents

Wheel assembly for a rail vehicle Download PDF

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Publication number
EP3504097B1
EP3504097B1 EP17765438.1A EP17765438A EP3504097B1 EP 3504097 B1 EP3504097 B1 EP 3504097B1 EP 17765438 A EP17765438 A EP 17765438A EP 3504097 B1 EP3504097 B1 EP 3504097B1
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EP
European Patent Office
Prior art keywords
carrier element
wheel
axle
speed sensor
carrier
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EP17765438.1A
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German (de)
French (fr)
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EP3504097A1 (en
Inventor
Harald JANSKY
Martin Teichmann
Andreas Kitzmüller
Florian Mair
Johann BLAHA
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Siemens Mobility Austria GmbH
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Siemens Mobility Austria GmbH
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Publication of EP3504097A1 publication Critical patent/EP3504097A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/20—Details
    • B61F15/28—Axle-boxes modified to ensure electrical conductivity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H5/00—Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes

Definitions

  • the invention relates to a wheel arrangement for a rail vehicle, in particular for a loose-wheel chassis of a low-floor vehicle, the wheel arrangement having at least one wheel, at least one stub axle, at least one speed sensor, at least one grounding contact, and a carrier device arranged on the stub axle.
  • the carrier device comprises at least a first carrier element and a second carrier element, which are each designed as individual components, the second carrier element having at least one first recess in which at least components are arranged which rotate with the wheel.
  • Components such as speed sensors, grounding contacts and brake units, etc. are often arranged at the ends of wheelset axles or axle stubs of running gears, in particular of low-floor vehicles.
  • wheelset shafts extending over the entire width of the running gear cannot be provided due to the low floor height.
  • Wheels are rotatably connected to portal axles arranged near the ground via axle stubs on the outside of the running gear in order to provide space for a car body in the center of the running gear.
  • a brake unit of a rail vehicle can, for example, comprise a brake disk and a brake caliper as well as other components.
  • the brake disc is often firmly connected to the wheel via a wheel hub and rotates with it, while the brake caliper is firmly connected to the axle stub and does not rotate.
  • the load on the stub axle from the components arranged on it is inconsistent: while the brake unit is subjected to a heavy load due to weight and braking forces exerts, the load due to the speed sensor and the ground contact, etc. is reduced.
  • the carrier element is arranged on the end face of an axle stub and is firmly connected to it.
  • a vehicle wheel which is intended in particular for a low-floor vehicle.
  • a device is provided on the outside end face of a wheel hub, on which various components, such as a transmission part, a brake disc, etc., can be optionally arranged.
  • DE 196 54 339 A1 describes a receiving device for a grounding contact for a rail vehicle, which is connected to a wheel and a wheel axle via various components.
  • a plastic sealing body and a pressure cap are provided between the wheel axle and the receiving device.
  • the invention is based on the object of specifying a wheel arrangement which is improved over the prior art.
  • this object is achieved with a wheel arrangement of the type mentioned in the introduction, in which at least one component of a grounding contact is arranged in a second recess.
  • first support element and the second support element which depends on the loading of the first support element and the second support element due to the components to be arranged thereon.
  • a brake unit can be arranged on the first carrier element and this can be connected to an end face of the axle stub. Due to the weight and braking forces that occur, the first carrier element is heavily loaded and is therefore designed as a massive component made of a high-quality material.
  • the second carrier element can be arranged, for example, in the form of a jacket around the axle stub.
  • the speed sensor and the grounding contact can be arranged on the second carrier element. Since the second support element is only loaded due to the weight of the speed sensor and the grounding contact, a lighter material with poorer mechanical properties can be selected than for the first support element. This results in a weight advantage. Due to the arrangement described, in which the heavier, first carrier element is provided on the inside with respect to its radial position to the axis of rotation of the wheel assembly and the lighter, second carrier element is provided on the outside, a low mass moment of inertia of the carrier device is achieved.
  • a speed sensor and a speed sensor crown wheel can be arranged in the first recess.
  • At least the first carrier element is designed as a pressure cap.
  • the first carrier element in addition to its function as a holding means for components of the wheel arrangement (e.g. a brake unit), also secures the wheel against unwanted axial movements. Due to this functionality, the first carrier element can also be used for wheel assemblies in which no component (e.g. no brake unit) is arranged on the first carrier element, but only its function as a pressure cap is required.
  • the first support element can be connected axially, for example via a screw connection, and the second support element can be connected radially to the axle stub via a feather key connection.
  • first carrier element and the second carrier element and the components arranged thereon can be replaced quickly.
  • the invention is explained in more detail below using exemplary embodiments.
  • a in 1 The oblique view shown shows a variant of a wheel arrangement according to the invention for a loose-wheel chassis of a low-floor tram, a wheel 3 being arranged on the outside of a chassis frame that is not visible and to which a portal axle 1 is connected on the inside. Wheel 3 is via an in 2 visible stub axle 2 rotatably connected to the portal axle 1.
  • the wheel 3 has a wheel flange 5 , a tread 6 and a wheel web 7 , the wheel web 7 being firmly connected to a wheel hub 8 .
  • a flange brake disk 9 is detachably connected to the wheel hub 8 via a first hexagonal screw 11, a second hexagonal screw 12, a third hexagonal screw 13 and other screws that are not visible.
  • a carrier device 23 comprises a first carrier element 24 and a second carrier element 25.
  • the first carrier element 24 is provided on a side facing away from the chassis frame or the portal axle 1 are arranged to the axis of rotation 4 and around it, is connected to the stub axle 2 at the end.
  • the first carrier element 24 has a sector-shaped section to which a brake unit 28 designed as a brake caliper is connected via an eighth hexagon screw 18, a ninth hexagon screw 19, a tenth hexagon screw 20, an eleventh hexagon screw 21 and a twelfth hexagon screw 22.
  • the first carrier element 24 is made of tempered steel 42CrMo4+QT.
  • a friction ring 10 of the flange brake disc 9 is arranged between a first leg 29 and a second leg 30 of the brake unit 28 .
  • brake linings provided on the first leg 29 and the second leg 30 are pressed against the friction ring 10 .
  • the cylindrical second carrier element 25 is arranged around the first carrier element 24 and encasing it. It is connected on the shell side to the stub axle 2 via a feather key connection (not shown) and is secured against twisting in this way.
  • a speed sensor 31 and a grounding contact 33 are provided on the face side of the second carrier element 25 and are screwed to the second carrier element 25 .
  • the second carrier element 25 is mechanically only slightly loaded by the speed sensor 31 and the grounding contact 33 and is therefore made of structural steel S355J2+N. According to the invention, it is also conceivable to manufacture the second carrier element 25 from an aluminum material, as a result of which a great weight advantage is achieved.
  • FIG. 2 shows a detail of the in 1 described wheel assembly for a loose wheel chassis of a low-floor tram in a sectional view.
  • a wheel hub 8 is firmly connected.
  • a stub axle 2 is equipped with an in 1 visible portal axis 1 firmly connected.
  • the wheel hub 8 is rotatably mounted on the axle stub 2 via a tapered roller bearing 35 .
  • a carrier device 23 comprises a first carrier element 24 and a second carrier element 25.
  • the first carrier element 24 With one end face of the stub axle 2, the first carrier element 24 via a fourth hexagonal screw 14, a fifth hexagonal screw 15, a sixth hexagonal screw 16 and in 1 Visible seventh hexagonal screw 17, which are designed as headless screws and are arranged parallel to an axis of rotation 4 of the wheel 3, connected.
  • the first carrier element 24 is centered with respect to the axle stub 2 via a centering projection 41 . Due to the arrangement of the first carrier element 24 in the vicinity of the axis of rotation 4 of the wheel 3 and its small dimensions in the radial direction with respect to the axis of rotation 4, the centering projection 41 is short and can therefore be produced easily and inexpensively.
  • the cylindrical second carrier element 25 is arranged around the first carrier element 24 and encasing it. This adjoins the wheel hub 8 and the tapered roller bearing 35 with an end face facing the wheel 3 .
  • a pressure ring 36 is arranged between the second carrier element 25 and the tapered roller bearing 35 .
  • the second carrier element 25 has a first recess 26 in which an annular speed sensor crown wheel 32, which is arranged around the axis of rotation 4 of the wheel 3, and a speed sensor 31 are provided.
  • the longitudinal axis of the speed sensor 31 runs parallel to the axis of rotation 4 of the wheel 3.
  • the speed sensor 31 borders in the first recess 26 with one of its ends on the speed sensor crown wheel 32 and protrudes with its other end from the second carrier element 25, i.e. is from the second carrier element 25 is partially shielded from the surroundings of the chassis.
  • the speed sensor crown wheel 32 is arranged between the second carrier element 25, the wheel hub 8 and the tapered roller bearing 35 and is therefore completely shielded from the surroundings of the chassis.
  • the speed sensor crown wheel 32 is connected to the wheel hub 8 via a first headless screw 37 and other screws (not visible) and moves with it.
  • a grounding contact 33 is arranged on the end face of the second carrier element 25 facing away from the wheel 3 and is screwed to the second carrier element 25 via screw connections parallel to the axis of rotation 4 of the wheel 3 .
  • annular grounding contact slip ring 34 is arranged, which runs around the axis of rotation 4 of the wheel 3 .
  • the grounding contact slip ring 34 is connected to the wheel hub 8 and moves with it via a second headless screw 38, a third headless screw 39 and other screws that are not visible and run parallel to the axis of rotation 4 of the wheel 3. About an invisible one
  • the grounding contact 33 touches the grounding contact slip ring 34.
  • the ground contact slip ring 34 is arranged between the second carrier element 25 and the wheel hub 8 and is completely shielded from the surroundings of the chassis.
  • the second carrier element 25 is secured against unintentional twisting via a non-visible feather key connection, which is arranged on a lateral surface of the stub axle 2 and a lateral surface of the second carrier element 25 adjoining the stub axle 2 .
  • a non-visible feather key connection which is arranged on a lateral surface of the stub axle 2 and a lateral surface of the second carrier element 25 adjoining the stub axle 2 .
  • other positive or non-positive connections between the second carrier element 25 and the axle stub 2 are alternatively conceivable.
  • the first carrier element 24 borders on the front side of the second carrier element 25 via a shoulder 40 and secures this and the tapered roller bearing 35, the wheel hub 8 and the wheel 3 against unintentional movements in the direction of the axis of rotation 4 of the wheel 3, and therefore performs the function of a pressure cap.

Description

Die Erfindung betrifft eine Rad-Anordnung für ein Schienenfahrzeug, insbesondere für ein Losrad-Fahrwerk eines Niederflurfahrzeugs, wobei die Rad-Anordnung zumindest ein Rad, zumindest einen Achsstummel, zumindest einen Drehzahlgeber, zumindest einen Erdungskontakt, sowie eine auf dem Achsstummel angeordnete Trägereinrichtung aufweist, wobei die Trägereinrichtung zumindest ein erstes Trägerelement und ein zweites Trägerelement umfasst, die jeweils als einzelne Bauteile ausgeführt sind, wobei das zweite Trägerelement zumindest eine erste Ausnehmung aufweist, in welcher zumindest Komponenten angeordnet sind, welche mit dem Rad rotieren.The invention relates to a wheel arrangement for a rail vehicle, in particular for a loose-wheel chassis of a low-floor vehicle, the wheel arrangement having at least one wheel, at least one stub axle, at least one speed sensor, at least one grounding contact, and a carrier device arranged on the stub axle. wherein the carrier device comprises at least a first carrier element and a second carrier element, which are each designed as individual components, the second carrier element having at least one first recess in which at least components are arranged which rotate with the wheel.

An Enden von Radsatzwellen bzw. Achsstummeln von Fahrwerken, insbesondere von Niederflurfahrzeugen, sind häufig Komponenten wie Drehzahlgeber, Erdungskontakte und Bremseinheiten etc. angeordnet. Insbesondere bei Niederflurfahrzeugen können aufgrund der geringen Fußbodenhöhe keine sich über die ganze Breite des Fahrwerks erstreckende Radsatzwellen vorgesehen werden. Räder werden über Achsstummeln an Fahrwerksaußenseiten drehbar mit in Bodennähe angeordneten Portalachsen verbunden, um in Fahrwerksmitte Raum für einen Wagenkasten bereit zu stellen. Eine Bremseinheit eines Schienenfahrzeugs kann z.B. eine Bremsscheibe und eine Bremszange sowie weitere Komponenten umfassen. Insbesondere bei Niederflurfahrzeugen ist die Bremsscheibe häufig über eine Radnabe fest mit dem Rad verbunden und rotiert mit diesem, während die Bremszange fest mit dem Achsstummel verbunden ist und keine Rotation ausführt.Components such as speed sensors, grounding contacts and brake units, etc. are often arranged at the ends of wheelset axles or axle stubs of running gears, in particular of low-floor vehicles. In the case of low-floor vehicles in particular, wheelset shafts extending over the entire width of the running gear cannot be provided due to the low floor height. Wheels are rotatably connected to portal axles arranged near the ground via axle stubs on the outside of the running gear in order to provide space for a car body in the center of the running gear. A brake unit of a rail vehicle can, for example, comprise a brake disk and a brake caliper as well as other components. In low-floor vehicles in particular, the brake disc is often firmly connected to the wheel via a wheel hub and rotates with it, while the brake caliper is firmly connected to the axle stub and does not rotate.

Die Belastung des Achsstummels durch die auf ihm angeordneten Komponenten ist uneinheitlich: Während die Bremseinheit aufgrund von Gewichts- und Bremskräften eine starke Belastung ausübt, ist die Belastung aufgrund des Drehzahlgebers und des Erdungskontakts etc. geringer.The load on the stub axle from the components arranged on it is inconsistent: while the brake unit is subjected to a heavy load due to weight and braking forces exerts, the load due to the speed sensor and the ground contact, etc. is reduced.

Aus dem Stand der Technik ist die EP 1 258 410 B1 bekannt. Darin wird eine Anordnung beschrieben, bei der Komponenten einer Erdungskontaktanordnung, einer Geberanordnung für eine Gleitschutzeinrichtung sowie einer Bremseinrichtung über Aufnahmemittel auf einem einzigen Trägerelement gelagert sind.From the prior art is the EP 1 258 410 B1 known. An arrangement is described therein in which the components of a grounding contact arrangement, a sensor arrangement for an anti-skid device and a braking device are mounted on a single carrier element via receiving means.

Das Trägerelement ist stirnseitig auf einem Achsstummel angeordnet und fest mit diesem verbunden.The carrier element is arranged on the end face of an axle stub and is firmly connected to it.

Im Zusammenhang mit der EP 1 258 410 B1 ist auch die EP 1 258 410 A1 bekannt.In connection with the EP 1 258 410 B1 is also the EP 1 258 410 A1 known.

In der EP 0 943 519 B1 wird ein Fahrzeugrad gezeigt, das insbesondere für ein Niederflurfahrzeug vorgesehen ist. Auf der außenseitigen Stirnfläche einer Radnabe ist eine Einrichtung vorgesehen, auf der wahlweise verschiedene Komponenten, wie z.B. ein Getriebeteil, eine Bremsscheibe etc. angeordnet werden können.In the EP 0 943 519 B1 a vehicle wheel is shown which is intended in particular for a low-floor vehicle. A device is provided on the outside end face of a wheel hub, on which various components, such as a transmission part, a brake disc, etc., can be optionally arranged.

Ferner ist in der DE 196 54 339 A1 eine Aufnahmevorrichtung für einen Erdungskontakt für ein Schienenfahrzeug beschrieben, welche über verschiedene Bauteile mit einem Rad und mit einer Radachse verbunden ist. Zwischen der Radachse und der Aufnahmevorrichtung sind ein Kunststoff-Dichtkörper sowie eine Druckkappe vorgesehen.Furthermore, in the DE 196 54 339 A1 describes a receiving device for a grounding contact for a rail vehicle, which is connected to a wheel and a wheel axle via various components. A plastic sealing body and a pressure cap are provided between the wheel axle and the receiving device.

Der Erfindung liegt die Aufgabe zugrunde, eine gegenüber dem Stand der Technik verbesserte Rad-Anordnung anzugeben.The invention is based on the object of specifying a wheel arrangement which is improved over the prior art.

Erfindungsgemäß wird diese Aufgabe gelöst mit einer Rad-Anordnung der eingangs genannten Art, bei der in einer zweiten Ausnehmung zumindest eine Komponente eines Erdungskontakts angeordnet ist.According to the invention, this object is achieved with a wheel arrangement of the type mentioned in the introduction, in which at least one component of a grounding contact is arranged in a second recess.

Dadurch wird der Vorteil erzielt, dass die Trägereinrichtung flexibel im Hinblick auf auftretende Belastungen ausgelegt werden kann und sich daraus eine Gewichts- und Kostenersparnis ergibt.This achieves the advantage that the carrier device can be designed flexibly with regard to the loads that occur, resulting in weight and cost savings.

Beispielsweise kann für das erste Trägerelement und das zweite Trägerelement jeweils eine eigene Werkstoffwahl getroffen werden, die sich nach der Belastung des ersten Trägerelements und des zweiten Trägerelements aufgrund der darauf anzuordnenden Komponenten richtet.For example, a separate choice of material can be made for the first support element and the second support element, which depends on the loading of the first support element and the second support element due to the components to be arranged thereon.

Beispielsweise kann eine Bremseinheit auf dem ersten Trägerelement angeordnet sein und dieses mit einer Stirnfläche des Achsstummels verbunden sein. Aufgrund auftretender Gewichts- und Bremskräfte wird das erste Trägerelement stark belastet und ist daher als massige Komponente aus einem hochwertigen Werkstoff ausgeführt.For example, a brake unit can be arranged on the first carrier element and this can be connected to an end face of the axle stub. Due to the weight and braking forces that occur, the first carrier element is heavily loaded and is therefore designed as a massive component made of a high-quality material.

Das zweite Trägerelement kann beispielsweise mantelförmig um den Achsstummel angeordnet sein. Auf dem zweiten Trägerelement können der Drehzahlgeber und der Erdungskontakt angeordnet sein. Da das zweite Trägerelement nur aufgrund der Gewichtskräfte des Drehzahlgebers und des Erdungskontakts belastet wird, kann ein leichterer Werkstoff mit schlechteren mechanischen Eigenschaften als für das erste Trägerelement gewählt werden. Dadurch wird ein Gewichtsvorteil bewirkt. Aufgrund der beschriebenen Anordnung, bei der das schwerere, erste Trägerelement in Bezug auf seine radiale Position zur Drehachse der Rad-Anordnung innenliegend und das leichtere, zweite Trägerelement außenliegend vorgesehen ist, wird ein geringes Massenträgheitsmoment der Trägereinrichtung erzielt. Weiterhin sind im Vergleich zu dem ersten Trägerelement, wenn auf diesem beispielsweise eine Bremseinheit angeordnet ist, für das zweite Trägerelement, wenn auf diesem beispielsweise ein Drehzahlgeber und ein Erdungskontakt angeordnet sind, keine präzisen Fertigungstoleranzen erforderlich, wodurch sich in der Herstellung ein Kostenvorteil ergibt.The second carrier element can be arranged, for example, in the form of a jacket around the axle stub. The speed sensor and the grounding contact can be arranged on the second carrier element. Since the second support element is only loaded due to the weight of the speed sensor and the grounding contact, a lighter material with poorer mechanical properties can be selected than for the first support element. This results in a weight advantage. Due to the arrangement described, in which the heavier, first carrier element is provided on the inside with respect to its radial position to the axis of rotation of the wheel assembly and the lighter, second carrier element is provided on the outside, a low mass moment of inertia of the carrier device is achieved. Furthermore, in comparison to the first carrier element, if a brake unit is arranged on it, for example, no precise manufacturing tolerances are required for the second carrier element if a speed sensor and a grounding contact are arranged on it, which results in a cost advantage in production.

Darüber hinaus ist eine Montage und Demontage des ersten Trägerelements und des zweiten Trägerelements unmittelbar von einer Seite eines Schienenfahrzeugs aus, ohne Infrastruktureinrichtungen wie eine Grube, ein Hochgleis etc. und daher einfach, rasch und kostengünstig möglich.In addition, assembly and disassembly of the first support member and the second support member directly from one side of a rail vehicle, without infrastructure facilities such as a pit, a raised track, etc. and is therefore possible easily, quickly and inexpensively.

Durch diese Maßnahme wird weiterhin eine günstige, vor Umgebungseinflüssen schützende Ummantelung von Komponenten erzielt. Beispielsweise können in der ersten Ausnehmung ein Drehzahlgeber sowie ein Drehzahlgeber-Kronrad angeordnet sein.This measure also achieves a favorable encapsulation of components that protects against environmental influences. For example, a speed sensor and a speed sensor crown wheel can be arranged in the first recess.

Es ist günstig, wenn das zumindest erste Trägerelement als Druckkappe ausgeführt ist.It is favorable if at least the first carrier element is designed as a pressure cap.

Durch diese Maßnahme wird der Vorteil erzielt, dass das erste Trägerelement neben seiner Funktion als Haltemittel für Komponenten der Rad-Anordnung (z.B. eine Bremseinheit) auch das Rad gegen ungewollte, axiale Bewegungen sichert. Das erste Trägerelement kann aufgrund dieser Funktionalität auch für Rad-Anordnungen eingesetzt werden, bei denen keine Komponente (z.B. keine Bremseinheit) auf dem ersten Trägerelement angeordnet wird, sondern lediglich dessen Funktion als Druckkappe benötigt wird.This measure has the advantage that the first carrier element, in addition to its function as a holding means for components of the wheel arrangement (e.g. a brake unit), also secures the wheel against unwanted axial movements. Due to this functionality, the first carrier element can also be used for wheel assemblies in which no component (e.g. no brake unit) is arranged on the first carrier element, but only its function as a pressure cap is required.

Eine vorteilhafte Ausgestaltung erhält man, wenn das zumindest erste Trägerelement und das zweite Trägerelement lösbar mit dem zumindest einen Achsstummel verbunden sind. Durch diese Maßnahme wird eine günstige Flexibilität und Effizienz im Hinblick auf eine Montage und Demontage des ersten Trägerelements und des zweiten Trägerelements erzielt. Das erste Trägerelement kann beispielsweise über eine Schraubenverbindung axial, das zweite Trägerelement über eine Passfederverbindung radial mit dem Achsstummel verbunden werden.An advantageous embodiment is obtained when the at least first carrier element and the second carrier element are detachably connected to the at least one axle stub. This measure achieves favorable flexibility and efficiency with regard to assembly and disassembly of the first carrier element and the second carrier element. The first support element can be connected axially, for example via a screw connection, and the second support element can be connected radially to the axle stub via a feather key connection.

Bei Wartungs- und Instandhaltungstätigkeiten ist ein rascher Tausch des ersten Trägerelements und des zweiten Trägerelements sowie darauf angeordneter Komponenten möglich. Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen näher erläutert.During maintenance and repair work, the first carrier element and the second carrier element and the components arranged thereon can be replaced quickly. The invention is explained in more detail below using exemplary embodiments.

Es zeigen beispielhaft:

Fig. 1:
Einen Schrägriss einer beispielhaften Ausführung einer erfindungsgemäßen Rad-Anordnung, wobei ein Rad mit einer Radnabe, einer Flanschbremsscheibe, einem ersten Trägerelement mit einer Bremszange und einem zweiten Trägerelement mit einem Drehzahlgeber und einem Erdungskontakt sowie ein Ausschnitt aus einer Portalachse dargestellt sind, und
Fig. 2:
Einen Schrägriss einer beispielhaften Ausführung einer erfindungsgemäßen Rad-Anordnung, wobei ein Erdungskontakt sowie ausschnittsweise ein Achsstummel, eine Radnabe, ein erstes Trägerelement und ein zweites Trägerelement dargestellt sind.
Examples show:
Figure 1:
An oblique view of an exemplary embodiment of a wheel assembly according to the invention, showing a wheel with a wheel hub, a flanged brake disc, a first carrier element with a brake caliper and a second carrier element with a speed sensor and a grounding contact, as well as a detail from a portal axle
Figure 2:
An oblique view of an exemplary embodiment of a wheel assembly according to the invention, with a grounding contact and details of an axle stub, a wheel hub, a first carrier element and a second carrier element being shown.

Ein in Fig. 1 dargestellter Schrägriss zeigt eine Variante einer erfindungsgemäßen Rad-Anordnung für ein Losrad-Fahrwerk einer Niederflur-Straßenbahn, wobei auf einer Außenseite eines nicht sichtbaren Fahrwerksrahmens, mit dem auf einer Innenseite eine Portalachse 1 verbunden ist, ein Rad 3 angeordnet ist. Das Rad 3 ist über einen in Fig. 2 sichtbaren Achsstummel 2 drehbar mit der Portalachse 1 verbunden. Das Rad 3 weist einen Spurkranz 5, eine Lauffläche 6 sowie einen Radsteg 7 auf, wobei der Radsteg 7 fest mit einer Radnabe 8 verbunden ist. Eine Flanschbremsscheibe 9 ist über eine erste Sechskantschraube 11, eine zweite Sechskantschraube 12, eine dritte Sechskantschraube 13 sowie nicht sichtbare, weitere Schrauben lösbar mit der Radnabe 8 verbunden.a in 1 The oblique view shown shows a variant of a wheel arrangement according to the invention for a loose-wheel chassis of a low-floor tram, a wheel 3 being arranged on the outside of a chassis frame that is not visible and to which a portal axle 1 is connected on the inside. Wheel 3 is via an in 2 visible stub axle 2 rotatably connected to the portal axle 1. The wheel 3 has a wheel flange 5 , a tread 6 and a wheel web 7 , the wheel web 7 being firmly connected to a wheel hub 8 . A flange brake disk 9 is detachably connected to the wheel hub 8 via a first hexagonal screw 11, a second hexagonal screw 12, a third hexagonal screw 13 and other screws that are not visible.

Eine Trägereinrichtung 23 umfasst ein erstes Trägerelement 24 und ein zweites Trägerelement 25.A carrier device 23 comprises a first carrier element 24 and a second carrier element 25.

Im Bereich einer Drehachse 4 des Rads 3 ist auf einer dem Fahrwerksrahmen bzw. der Portalachse 1 abgewandten Seite das erste Trägerelement 24 vorgesehen, das über eine vierte Sechskantschraube 14, eine fünfte Sechskantschraube 15, eine sechste Sechskantschraube 16 und eine siebente Sechskantschraube 17, die parallel zu der Drehachse 4 und um diese herum angeordnet sind, mit dem Achsstummel 2 stirnseitig verbunden ist. Das erste Trägerelement 24 weist einen kreissektorförmigen Abschnitt auf, mit dem über eine achte Sechskantschraube 18, eine neunte Sechskantschraube 19, eine zehnte Sechskantschraube 20, eine elfte Sechskantschraube 21 sowie eine zwölfte Sechskantschraube 22 eine als Bremszange ausgeführte Bremseinheit 28 verbunden ist.In the area of an axis of rotation 4 of the wheel 3, the first carrier element 24 is provided on a side facing away from the chassis frame or the portal axle 1 are arranged to the axis of rotation 4 and around it, is connected to the stub axle 2 at the end. The first carrier element 24 has a sector-shaped section to which a brake unit 28 designed as a brake caliper is connected via an eighth hexagon screw 18, a ninth hexagon screw 19, a tenth hexagon screw 20, an eleventh hexagon screw 21 and a twelfth hexagon screw 22.

Aufgrund starker Belastungen durch die Bremseinheit 28 ist das erste Trägerelement 24 aus vergütetem Stahl 42CrMo4+QT ausgeführt.Due to heavy loads from the brake unit 28, the first carrier element 24 is made of tempered steel 42CrMo4+QT.

Ein Reibring 10 der Flanschbremsscheibe 9 ist zwischen einem ersten Schenkel 29 und einem zweiten Schenkel 30 der Bremseinheit 28 angeordnet. Bei einer Bremsung werden auf dem ersten Schenkel 29 und dem zweite Schenkel 30 vorgesehene Bremsbeläge an den Reibring 10 gepresst.A friction ring 10 of the flange brake disc 9 is arranged between a first leg 29 and a second leg 30 of the brake unit 28 . When braking, brake linings provided on the first leg 29 and the second leg 30 are pressed against the friction ring 10 .

Um das erste Trägerelement 24 herum und dieses ummantelnd ist das zylindrische zweite Trägerelement 25 angeordnet. Es ist über eine nicht dargestellte Passfederverbindung mantelseitig mit dem Achsstummel 2 verbunden und auf diese Weise gegen Verdrehung gesichert.The cylindrical second carrier element 25 is arranged around the first carrier element 24 and encasing it. It is connected on the shell side to the stub axle 2 via a feather key connection (not shown) and is secured against twisting in this way.

Auf dem zweiten Trägerelement 25 sind stirnseitig ein Drehzahlgeber 31 und ein Erdungskontakt 33 vorgesehen, die mit dem zweiten Trägerelement 25 verschraubt sind. Das zweite Trägerelement 25 wird durch den Drehzahlgeber 31 und den Erdungskontakt 33 mechanisch nur schwach belastet und ist daher aus Baustahl S355J2+N ausgeführt. Erfindungsgemäß ist es auch vorstellbar, das zweite Trägerelement 25 aus einem Aluminiumwerkstoff zu fertigen, wodurch ein großer Gewichtsvorteil erzielt wird.A speed sensor 31 and a grounding contact 33 are provided on the face side of the second carrier element 25 and are screwed to the second carrier element 25 . The second carrier element 25 is mechanically only slightly loaded by the speed sensor 31 and the grounding contact 33 and is therefore made of structural steel S355J2+N. According to the invention, it is also conceivable to manufacture the second carrier element 25 from an aluminum material, as a result of which a great weight advantage is achieved.

Fig. 2 zeigt ein Detail der in Fig. 1 beschriebenen Rad-Anordnung für ein Losrad-Fahrwerk einer Niederflur-Straßenbahn in Schnittdarstellung. Mit einem Rad 3 ist eine Radnabe 8 fest verbunden. Ein Achsstummel 2 ist mit einer in Fig. 1 sichtbaren Portalachse 1 fest verbunden. Die Radnabe 8 ist über ein Kegelrollenlager 35 auf dem Achsstummel 2 drehbar gelagert. 2 shows a detail of the in 1 described wheel assembly for a loose wheel chassis of a low-floor tram in a sectional view. With a wheel 3, a wheel hub 8 is firmly connected. A stub axle 2 is equipped with an in 1 visible portal axis 1 firmly connected. The wheel hub 8 is rotatably mounted on the axle stub 2 via a tapered roller bearing 35 .

Eine Trägereinrichtung 23 umfasst ein erstes Trägerelement 24 und ein zweites Trägerelement 25.A carrier device 23 comprises a first carrier element 24 and a second carrier element 25.

Mit einer Stirnseite des Achsstummels 2 ist das erste Trägerelement 24 über eine vierte Sechskantschraube 14, eine fünfte Sechskantschraube 15, eine sechste Sechskantschraube 16 und eine in Fig. 1 sichtbare siebente Sechskantschraube 17, die als Schaftschrauben ausgeführt und parallel zu einer Drehachse 4 des Rads 3 angeordnet sind, verbunden.With one end face of the stub axle 2, the first carrier element 24 via a fourth hexagonal screw 14, a fifth hexagonal screw 15, a sixth hexagonal screw 16 and in 1 Visible seventh hexagonal screw 17, which are designed as headless screws and are arranged parallel to an axis of rotation 4 of the wheel 3, connected.

Das erste Trägerelement 24 ist über einen Zentrieransatz 41 bezüglich des Achsstummels 2 zentriert. Der Zentrieransatz 41 ist aufgrund der Anordnung des ersten Trägerelements 24 in der Nähe der Drehachse 4 des Rads 3 und seiner geringen Abmessungen in radialer Richtung bezüglich der Drehachse 4 kurz ausgeführt und somit einfach sowie kostengünstig herstellbar.The first carrier element 24 is centered with respect to the axle stub 2 via a centering projection 41 . Due to the arrangement of the first carrier element 24 in the vicinity of the axis of rotation 4 of the wheel 3 and its small dimensions in the radial direction with respect to the axis of rotation 4, the centering projection 41 is short and can therefore be produced easily and inexpensively.

Um das erste Trägerelement 24 herum und dieses ummantelnd ist das zylindrische zweite Trägerelement 25 angeordnet. Dieses grenzt mit einer dem Rad 3 zugewandten Stirnseite an die Radnabe 8 und an das Kegelrollenlager 35. Zwischen dem zweiten Trägerelement 25 und dem Kegelrollenlager 35 ist ein Druckring 36 angeordnet.The cylindrical second carrier element 25 is arranged around the first carrier element 24 and encasing it. This adjoins the wheel hub 8 and the tapered roller bearing 35 with an end face facing the wheel 3 . A pressure ring 36 is arranged between the second carrier element 25 and the tapered roller bearing 35 .

Das zweite Trägerelement 25 weist eine erste Ausnehmung 26 auf, in der ein ringförmiges Drehzahlgeber-Kronrad 32, das um die Drehachse 4 des Rads 3 herum angeordnet ist, sowie ein Drehzahlgeber 31 vorgesehen sind. Die Längsachse des Drehzahlgebers 31 verläuft parallel zu der Drehachse 4 des Rads 3. Der Drehzahlgeber 31 grenzt in der ersten Ausnehmung 26 mit einem seiner Enden an das Drehzahlgeber-Kronrad 32 und ragt mit seinem anderen Ende aus dem zweiten Trägerelement 25 heraus, d.h. ist von dem zweiten Trägerelement 25 teilweise gegenüber einer Umgebung des Fahrwerks abgeschirmt. Das Drehzahlgeber-Kronrad 32 ist zwischen dem zweiten Trägerelement 25, der Radnabe 8 und dem Kegelrollenlager 35 angeordnet, ist demnach vollständig gegenüber der Umgebung des Fahrwerks abgeschirmt.The second carrier element 25 has a first recess 26 in which an annular speed sensor crown wheel 32, which is arranged around the axis of rotation 4 of the wheel 3, and a speed sensor 31 are provided. The longitudinal axis of the speed sensor 31 runs parallel to the axis of rotation 4 of the wheel 3. The speed sensor 31 borders in the first recess 26 with one of its ends on the speed sensor crown wheel 32 and protrudes with its other end from the second carrier element 25, i.e. is from the second carrier element 25 is partially shielded from the surroundings of the chassis. The speed sensor crown wheel 32 is arranged between the second carrier element 25, the wheel hub 8 and the tapered roller bearing 35 and is therefore completely shielded from the surroundings of the chassis.

Über eine erste Schaftschraube 37 sowie weitere, nicht sichtbare Schrauben ist das Drehzahlgeber-Kronrad 32 mit der Radnabe 8 verbunden und bewegt sich mit dieser mit.The speed sensor crown wheel 32 is connected to the wheel hub 8 via a first headless screw 37 and other screws (not visible) and moves with it.

Auf der dem Rad 3 abgewandten Stirnseite des zweiten Trägerelements 25 ist ein Erdungskontakt 33 angeordnet und über Schraubenverbindungen parallel zu der Drehachse 4 des Rads 3 mit dem zweiten Trägerelement 25 verschraubt.A grounding contact 33 is arranged on the end face of the second carrier element 25 facing away from the wheel 3 and is screwed to the second carrier element 25 via screw connections parallel to the axis of rotation 4 of the wheel 3 .

In einer zweiten Ausnehmung 27 des zweiten Trägerelements 25 ist ein ringförmiger Erdungskontakt-Schleifring 34 angeordnet, der um die Drehachse 4 des Rads 3 herum verläuft.In a second recess 27 of the second carrier element 25 an annular grounding contact slip ring 34 is arranged, which runs around the axis of rotation 4 of the wheel 3 .

Über eine zweite Schaftschraube 38, eine dritte Schaftschraube 39 sowie weitere, nicht sichtbare Schrauben, die parallel zu der Drehachse 4 des Rads 3 verlaufen, ist der Erdungskontakt-Schleifring 34 mit der Radnabe 8 verbunden und bewegt sich mit dieser mit. Über einen nicht sichtbarenThe grounding contact slip ring 34 is connected to the wheel hub 8 and moves with it via a second headless screw 38, a third headless screw 39 and other screws that are not visible and run parallel to the axis of rotation 4 of the wheel 3. About an invisible one

Bereich der zweiten Ausnehmung 27, der parallel zu der Drehachse 4 des Rads 3 verläuft, berührt der Erdungskontakt 33 den Erdungskontakt-Schleifring 34.In the area of the second recess 27 that runs parallel to the axis of rotation 4 of the wheel 3, the grounding contact 33 touches the grounding contact slip ring 34.

Der Erdungskontakt-Schleifring 34 ist, zwischen dem zweiten Trägerelement 25 und der Radnabe 8 angeordnet, vollständig von der Umgebung des Fahrwerks abgeschirmt.The ground contact slip ring 34 is arranged between the second carrier element 25 and the wheel hub 8 and is completely shielded from the surroundings of the chassis.

Das zweite Trägerelement 25 ist über eine nicht sichtbare Passfederverbindung, die auf einer Mantelfläche des Achsstummels 2 und einer an den Achsstummel 2 grenzenden Mantelfläche des zweiten Trägerelements 25 angeordnet ist, gegen unbeabsichtigte Verdrehungen gesichert. Erfindungsgemäß sind alternativ auch andere, form- oder kraftschlüssige Verbindungen zwischen dem zweiten Trägerelement 25 und dem Achsstummel 2 vorstellbar.The second carrier element 25 is secured against unintentional twisting via a non-visible feather key connection, which is arranged on a lateral surface of the stub axle 2 and a lateral surface of the second carrier element 25 adjoining the stub axle 2 . According to the invention, other positive or non-positive connections between the second carrier element 25 and the axle stub 2 are alternatively conceivable.

Das erste Trägerelement 24 grenzt über eine Schulter 40 stirnseitig an das zweite Trägerelement 25 und sichert dieses sowie das Kegelrollenlager 35, die Radnabe 8 und das Rad 3 gegen unbeabsichtigte Bewegungen in Richtung der Drehachse 4 des Rads 3, führt daher die Funktion einer Druckkappe aus.The first carrier element 24 borders on the front side of the second carrier element 25 via a shoulder 40 and secures this and the tapered roller bearing 35, the wheel hub 8 and the wheel 3 against unintentional movements in the direction of the axis of rotation 4 of the wheel 3, and therefore performs the function of a pressure cap.

Liste der BezeichnungenList of designations

11
Portalachseportal axis
22
Achsstummelstub axle
33
Radwheel
44
Drehachseaxis of rotation
55
Spurkranzwheel flange
66
Laufflächetread
77
Radstegwheel dock
88th
Radnabewheel hub
99
Flanschbremsscheibeflange brake disc
1010
Reibringfriction ring
1111
Erste SechskantschraubeFirst hex screw
1212
Zweite SechskantschraubeSecond hex bolt
1313
Dritte SechskantschraubeThird hex bolt
1414
Vierte SechskantschraubeFourth hex bolt
1515
Fünfte SechskantschraubeFifth hex bolt
1616
Sechste SechskantschraubeSixth hex bolt
1717
Siebente SechskantschraubeSeventh hex bolt
1818
Achte SechskantschraubeEighth hex bolt
1919
Neunte SechskantschraubeNinth hex bolt
2020
Zehnte SechskantschraubeTenth hex bolt
2121
Elfte SechskantschraubeEleventh hex bolt
2222
Zwölfte SechskantschraubeTwelfth hex bolt
2323
Trägereinrichtungcarrier device
2424
Erstes TrägerelementFirst carrier element
2525
Zweites TrägerelementSecond carrier element
2626
Erste AusnehmungFirst recess
2727
Zweite AusnehmungSecond recess
2828
Bremseinheitbrake unit
2929
Erster SchenkelFirst leg
3030
Zweiter Schenkelsecond leg
3131
Drehzahlgeberspeed sensor
3232
Drehzahlgeber-KronradSpeed sensor crown wheel
3333
Erdungskontaktground contact
3434
Erdungskontakt-SchleifringGround contact slip ring
3535
Kegelrollenlagertapered roller bearing
3636
Druckringpressure ring
3737
Erste SchaftschraubeFirst shank screw
3838
Zweite SchaftschraubeSecond set screw
3939
Dritte SchaftschraubeThird shank screw
4040
Schultershoulder
4141
Zentrieransatzcentering approach

Claims (7)

  1. Wheel arrangement for a rail vehicle, in particular for an idler-wheel undercarriage of a low-floor vehicle, having at least one wheel (3), at least one axis stub (2), at least one rotational-speed sensor (31), at least one earthing contact (33), and having a carrier device (23) which is arranged on the axle stub (2), wherein the carrier device (23) comprises at least one first carrier element (24) and a second carrier element (25), which are each designed as individual components, wherein the second carrier element (25) has at least one first cutout (26) in which at least components which rotate with the wheel are arranged, characterized in that at least one component of an earthing contact (33) is arranged in a second cutout (27).
  2. Wheel arrangement according to Claim 1, characterized in that at least one brake unit (28) is arranged on the at least first carrier element (24).
  3. Wheel arrangement according to Claim 1 or 2,
    characterized in that the at least first carrier element (24) is designed as a pressure cap.
  4. Wheel arrangement according to one of Claims 1, 2 and 3,
    characterized in that the at least first carrier element (24) and the second carrier element (25) are releasably connected to the at least one axle stub (2).
  5. Wheel arrangement according to one of Claims 1, 2, 3 and 4, characterized in that the at least first carrier element (24) is screwed to the at least one axle stub (2).
  6. Wheel arrangement according to one of Claims 1, 2, 3, 4 and 5, characterized in that the second carrier element (25) is connected via a feather-key connection to the at least one axle stub (2) so as to encase the latter.
  7. Wheel arrangement according to one of Claims 1 to 6,
    characterized in that at least one component of a rotational-speed sensor (31) is arranged in the first cutout (26).
EP17765438.1A 2016-09-29 2017-09-13 Wheel assembly for a rail vehicle Active EP3504097B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50875/2016A AT519147B1 (en) 2016-09-29 2016-09-29 Wheel arrangement for a rail vehicle
PCT/EP2017/072984 WO2018059937A1 (en) 2016-09-29 2017-09-13 Wheel assembly for a rail vehicle

Publications (2)

Publication Number Publication Date
EP3504097A1 EP3504097A1 (en) 2019-07-03
EP3504097B1 true EP3504097B1 (en) 2023-07-05

Family

ID=59858734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17765438.1A Active EP3504097B1 (en) 2016-09-29 2017-09-13 Wheel assembly for a rail vehicle

Country Status (3)

Country Link
EP (1) EP3504097B1 (en)
AT (1) AT519147B1 (en)
WO (1) WO2018059937A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020143363A1 (en) * 2019-01-10 2020-07-16 中车青岛四方机车车辆股份有限公司 Low-floor vehicle, bogie and shaft end structure thereof, and friction disc
AT525890B1 (en) 2022-06-28 2023-09-15 Siemens Mobility Austria Gmbh Method and device for determining wheel geometry and rail vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1259373B (en) * 1965-04-14 1968-01-25 Max Frost Earthing contact for electrical bridging of the axle bearings of rail vehicles
DE19654339B4 (en) * 1996-12-24 2004-12-02 G. Dietrich Gmbh Ground contact means
DE10122185A1 (en) * 2001-05-08 2002-11-14 Gutehoffnungshuette Radsatz Loose wheel assembly for rail vehicles has support element to accommodate stationary components of three functional units, while wheel provides mountings for associated rotating components
CN203601289U (en) * 2013-12-04 2014-05-21 南车株洲电力机车有限公司 Low-floor light rail vehicle

Also Published As

Publication number Publication date
AT519147A1 (en) 2018-04-15
EP3504097A1 (en) 2019-07-03
AT519147B1 (en) 2021-11-15
WO2018059937A1 (en) 2018-04-05

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