EP0077586B1 - Halterung für einen Eisenbahnbremsklotz - Google Patents

Halterung für einen Eisenbahnbremsklotz Download PDF

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Publication number
EP0077586B1
EP0077586B1 EP19820201268 EP82201268A EP0077586B1 EP 0077586 B1 EP0077586 B1 EP 0077586B1 EP 19820201268 EP19820201268 EP 19820201268 EP 82201268 A EP82201268 A EP 82201268A EP 0077586 B1 EP0077586 B1 EP 0077586B1
Authority
EP
European Patent Office
Prior art keywords
brake block
block holder
brake
push rod
cradle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19820201268
Other languages
English (en)
French (fr)
Other versions
EP0077586A1 (de
Inventor
Bo Nilsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sab Industri AB
Original Assignee
Sab Industri AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sab Industri AB filed Critical Sab Industri AB
Publication of EP0077586A1 publication Critical patent/EP0077586A1/de
Application granted granted Critical
Publication of EP0077586B1 publication Critical patent/EP0077586B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H1/00—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like
    • B61H1/003—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like with an actuator directly acting on a brake head

Definitions

  • This invention relates to a railway vehicle brake block holder, preferably for a brake unit, with means for its suspension, including brake block hangers pivotally attached to a fixed part, preferably a bracket, of the brake unit and to the brake block holder. Further, there is an arrangement for connection to a brake force applying push rod, this arrangement being at or near the center of the brake block holder and including a curved cradle. In this cradle is arranged a force transmitting member having a front surface for force receiving cooperation with a push plate at the end of the push rod.
  • a railway vehicle brake block holder of this kind is disclosed in EP 0018050.
  • the present invention is an improvement over the design shown therein.
  • a railway vehicle brake block holder is intended to act as a mounting means for a brake block or brake shoe, which transmits a braking force to a wheel of the vehicle and is replaced after having been worn out.
  • the brake block holder is conventionally suspended at its center as viewed from the side, preferably by means of brake block hangers, and the brake force is normally also applied to the brake block holder center, for example by means of a push rod.
  • the available space at a railway vehicle wheel is often very limited, and it is therefore of outmost importance to keep the external dimensions of the arrangement at a minimum.
  • the conventional solution with brake block holder hangers extending upwards from the center of the brake block holder past the whole holder to a fixed part on the housing of a brake unit is not optimal in this respect, especially if the brake unit itself is compact and a special bracket extending out from the unit is required for the brake block holder suspension.
  • each brake block hanger therefore extends downwardly beyond the center of the brake block holder from its pivotal attachment to the fixed part of the brake unit and is pivotally attached to the lower part of the brake block holder.
  • the force transmitting arrangement between the push rod and the brake block holder is at or near the center of the brake block holder.
  • the push rod is normally only axially movable, whereas the brake block holder due to its suspension will move along an arc. This means that relative movements between these two parts must be admitted.
  • the brake block holder is provided with a curved cradle, in which is arranged a force transmitting member having a front surface with a shape corresponding to the cradle (or in other words an arcuate shape) and a flat back surface for force receiving cooperation with a push plate at the end of the push rod.
  • these means are of the frictional type and comprise plungers in through bores in said member, the plungers being biased by springs into engagement with flat side walls in the brake block holder.
  • the spring biased plungers frictionally cooperating with said flat surfaces may namely give rise to non-desirable wear under the influence of the movements and vibrations occuring at normal operation of a railway vehicle.
  • the means for keeping the force transmitting member in place in the cradle comprise at least one, preferably Q-shaped, prestressed spring in a suitable recess in the force transmitting member for biasing said member against the cradle.
  • connection arrangement between the push rod and the brake block holder includes holding means in the form of a bundle of leaf springs extending through an axial slot in the push rod and abutting the push plate with its central part.
  • an Q-shaped spring is arranged on either side of the leaf spring bundle and in parallel therewith.
  • the legs of the a-shaped springs and the ends of the leaf spring bundle are supported by a cover attached to the brake block holder and having a central opening for the push rod.
  • This cover is preferably provided with two diametrically opposed heads for guiding the leaf spring bundle.
  • Fig. 1 is a side view, partly in section, of a brake block holder suspension according to the invention on a brake unit (only shown in part)
  • Fig. 2 is a top view, partly in section (lower part), of the same device
  • Fig. 3 is a front view, partly in section, of the same device.
  • a conventional brake unit 1 is in the shown case of the type having not shown means for transforming a certain movement of a not shown piston under the action of a fluid under pressure admitted thereto into a movement perpendicular thereto of a sleeve 2, preferably containing slack adjuster of any conventional kind.
  • a threaded spindle 3 which is only axially movable and below is called a push rod, is shown and extends out of the brake unit 1.
  • the push rod 3 is near its end provided with an axial slot 4 for a purpose to be described and has its end formed as a push plate 5.
  • a return spring 6 for the sleeve 2 is arranged around the same and acts with its shown, left hand end on the brake unit housing and with its right hand end on a not shown abutment on the sleeve 2.
  • the brake unit 1 is provided with holes 7 for mounting of the brake unit to a suitable, not shown part of a rail vehicle underframe in the vicinity of a not shown wheel.
  • the brake unit 1 is provided with two fixed suspension brackets 8 extending forward in the same general direction as the push rod 3.
  • a brake block hanger 9 is pivotally attached to each of these brackets 8 by means of a bracket screw 10.
  • a special journal and sealing arrangement at the pivotal connection between the members 8-10 is shown in the upper left part of Fig. 3. It consists of a hanger bushing 25, pressed into the hanger 9, a bushing 26, between these a low friction plastic journal bearing (not shown), a washer 27, and two sealing rings 28.
  • a brake block holder 11 with conventional, not further described means for releasably mounting of a not shown brake block or brake shoe is pivotally attached to the brake block hangers 9 by means of a common brake block holder screw 12 in inserts 13 in the brake block hangers 9. These inerts 13 are serrated at their ends abutting each other and are pressed into engagement with their respective hanger 9.
  • journal and sealing arrangement as shown in the lower part of Fig. 3 is provided at the pivotal connection between the members 11 and 13. It consists of a holder bushing 29 pressed into a corresponding hole in the holder 11, a low friction plastic journal bearing 30 and sealing rings 31.
  • connection between the brake block hangers 9 and the brake block holder 11 is at the lower part of the brake block holder 11, which primarily extends upwards between the brake block hangers 9, as appears clearly in Figs. 1 and 3.
  • a force transmitting member 15 has a front surface with an arcuate shape corresponding to the shape of the cradle 14, a flat back surface for engagement with the push plate 5 and a flat side surface near the brake holder side-walls 11'.
  • the center of said arc lies to the right of the push plate 5 as viewed in Fig. 1, thus making the force transmitting member 15 self- adjusting.
  • a rubber bellows 19 for preventing the intrusion of moist, dirt and the like is arranged between the brake unit 1 and a cover 20, which is attached to the brake block holder 11 by means of screws 21.
  • a cover 20 which is attached (for example by welding) two diametrically opposed heads 22, which are both indicated in Fig. 3 but of which only one is indicated in Fig. 1.
  • a bundle of leaf springs 23, bent to an open V-shape as appears from Fig. 1, is arranged in the cover 20 guided by the two heads 22 and extends through the axial slot 4 in the adjuster spindle 3 and is in contact with the push plate 5 on the push rod 3.
  • the leaf springs 23 will keep the holder substantially perpendicular to the push rod 3 or in other words substantially vertical in the shown case irrespective of the position of the hangers.
  • the leaf springs 23 will also keep the different parts in the device together in a substantially play-free manner. Moreover the forces from the shocks and vibrations during normal service of the vehicle will be taken up by the leaf springs 23 so as to prevent the force transmitting means 15 from moving except when required during braking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Claims (4)

1. Schienenfahrzeugbremsklotzhalter (11), vorzugsweise für eine Bremsanlage (1) mit einer Einrichtung zu seiner Aufhängung, die Bremsklotzhängeeisen (9) einschließt, die schwenkbar an einem festen Teil, vorzugsweise einem Träger (8) der Bremsanlage und an dem Bremsklotzhalter (11), angebracht sind, und mit einer Anordnung zur Verbindung mit einer die Bremskraft anlegenden Zugstange (3), wobei diese Anordnung sich im wesentlichen an und nahe der Mitte des Bremsklotzhalters befindet und eine gekrümmte Wiege (14) enthält, in die ein Kraftübertragungselement (15) eingreift, das eine Vorderfläche mit einer Form, die der Wiege entspricht, und eine ebene Rückfläche zur kraftaufnehmenden Zusammenarbeit mit einer Zugplatte (5) am Ende der Zugstange hat, gekennzeichnet durch wenigstens eine, vorzugszweise Q-förmige vorgespannte Feder (16) in einer geeigneten Aussparung (17) im Kraftübertragungselement (15) zum Vorspannen dieses Elementes gegen die Wiege (14).
2. Bremsklotzhalter nach Anspruch 1, bei dem die Verbindungsanordnung zwischen der Zugstange (3) und dem Bremsklotzhalter (11) eine Halteeinrichtung in Form eines Paketes von Blattfedern (23) einschließt, die sich durch einen axialen Schlitz (4) in der Zugstange (3) erstrecken und mit ihrem mittleren Teil an der Zugplatte (5) anliegen, dadurch gekennzeichnet, daß eine 0- förmige Feder (16) auf einer Seite des Blattfederpaketes (23) und parallel dazu angeordnet ist.
3. Bremsklotzhalter nach Anspruch 2, dadurch gekennzeichnet, daß die Schenkel der Ω-förmigen Federn (16) und die Enden des Blattfederpaketes (23) von einer Kappe (20) gehalten sind, die am Bremsklotzhalter (11) angebracht ist und eine mittlere Öffnung für die Zugstange (3) aufweist.
4. Bremsklotzhalter nach Anspruch 3, dadurch gekennzeichnet, daß die Kappe (20) mit zwei diametral gegenüberliegenden Köpfen (22) zum Führen des Blattfederpaketes (23) versehen ist.
EP19820201268 1981-10-16 1982-10-12 Halterung für einen Eisenbahnbremsklotz Expired EP0077586B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8106129 1981-10-16
SE8106129A SE439469B (sv) 1981-10-16 1981-10-16 Bromsblockhallare hos ett jernvegsfordon

Publications (2)

Publication Number Publication Date
EP0077586A1 EP0077586A1 (de) 1983-04-27
EP0077586B1 true EP0077586B1 (de) 1985-07-31

Family

ID=20344812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820201268 Expired EP0077586B1 (de) 1981-10-16 1982-10-12 Halterung für einen Eisenbahnbremsklotz

Country Status (3)

Country Link
EP (1) EP0077586B1 (de)
DE (1) DE3265097D1 (de)
SE (1) SE439469B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172070B (en) * 1985-02-16 1988-06-29 Marmon Holdings Railway vehicles
US6535912B1 (en) 1999-08-31 2003-03-18 Lucent Technologies Inc. Method for creating and playing back a smart bookmark that automatically retrieves a requested Web page through a plurality of intermediate Web pages
SE535759C2 (sv) 2011-04-06 2012-12-11 Faiveley Transport Nordic Ab Bromsaktuator för ett rälsfordon med en bromsblockhållare
FR3132071A1 (fr) * 2022-01-24 2023-07-28 Faiveley Transport Amiens Système de freinage ferroviaire pour véhicule ferroviaire, à freins à au moins un sabot, et véhicule ferroviaire pourvu d’un tel système

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469504A (en) * 1948-06-14 1949-05-10 Illinois Railway Equipment Co Brake beam supporting means for railroad cars
SE434377B (sv) * 1979-04-20 1984-07-23 Sab Ind Ab Bromsblockhallare hos ett jernvegsfordon

Also Published As

Publication number Publication date
SE439469B (sv) 1985-06-17
DE3265097D1 (en) 1985-09-05
EP0077586A1 (de) 1983-04-27
SE8106129L (sv) 1983-04-17

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