EP0137431B1 - Klotzbremse für Schienenfahrzeuge - Google Patents

Klotzbremse für Schienenfahrzeuge Download PDF

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Publication number
EP0137431B1
EP0137431B1 EP84111619A EP84111619A EP0137431B1 EP 0137431 B1 EP0137431 B1 EP 0137431B1 EP 84111619 A EP84111619 A EP 84111619A EP 84111619 A EP84111619 A EP 84111619A EP 0137431 B1 EP0137431 B1 EP 0137431B1
Authority
EP
European Patent Office
Prior art keywords
friction
axis
shoe
brake
rotation
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
EP84111619A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0137431A3 (enExample
EP0137431A2 (de
Inventor
Josef Staltmeir
Bernd Wosegien
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.)
Knorr Bremse AG
Original Assignee
Knorr Bremse AG
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 Knorr Bremse AG filed Critical Knorr Bremse AG
Publication of EP0137431A2 publication Critical patent/EP0137431A2/de
Publication of EP0137431A3 publication Critical patent/EP0137431A3/xx
Application granted granted Critical
Publication of EP0137431B1 publication Critical patent/EP0137431B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H13/00—Actuating rail vehicle brakes
    • B61H13/34—Details
    • B61H13/38—Suspension of transmitting mechanisms
    • 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

  • the invention relates to a block brake for rail vehicles, with a brake block shoe movable on the vehicle frame via at least one intermediate part at least approximately radially to the axis of a vehicle wheel to be braked, and a brake block shoe rotatably held about an axis of rotation at least approximately parallel to this axis, the axis of rotation being at a distance from the center of gravity of the brake block shoe , with a brake pad actuator effective between the intermediate part and the brake block shoe, which has in one of the parts - brake block shoe or intermediate part - at least one displaceably held friction block which is resiliently pressed against a friction surface of the other part - intermediate part or brake block shoe, with relative rotations between ' Intermediate part and brake shoe around the axis of rotation are prevented from friction by relative displacements between the friction block and the friction surface.
  • a block brake of the type mentioned above is known from DE-C-16 05 853.
  • the brake shoe which has an interchangeable brake block, is suspended by means of the axis of rotation from a pendulum lever to be addressed as an intermediate part, and at the same time the piston rod of a brake cylinder, which is to be referred to as a push rod, acts on the axis of rotation, under whose force the brake shoe can be pressed against the vehicle wheel.
  • Two rocking blocks are slidably mounted in the pendulum lever with a common axis parallel to the axis of rotation, between which a spring that spreads apart the friction blocks is clamped.
  • the spring presses the friction pads against curved friction surfaces on the brake shoe arranged in planes that are perpendicular to the axis of rotation.
  • the axis of rotation passes through the brake shoe near its end facing away from the vehicle wheel, while the center of gravity of the brake shoe is near the vehicle wheel due to the relatively heavy brake shoe; gravity thus exerts a constant torque on the brake shoe around the axis of rotation, which tries to disrupt the respective setting of the brake shoe by the brake pad actuator and which must be absorbed by the brake pad actuator.
  • the brake pad actuator must therefore be designed to be strong, with high frictional force, nevertheless it is not guaranteed that the brake pad shoe will not be unscrewed from its target position, especially in the case of hard, vertical driving impacts.
  • the friction surface is designed as a wedge surface which presses back the friction block against its spring loading when the brake shoe rotates about the axis of rotation due to gravity.
  • the friction surface is designed as a wedge surface which presses back the friction block against its spring loading when the brake shoe rotates about the axis of rotation due to gravity.
  • the subclaims show particularly advantageous design options for the block brake, with a particularly uniform lifting stroke of the brake block shoe from the vehicle wheel being obtained when the brake block actuator is arranged between the brake block shoe and a push rod in the released state of the block brake.
  • a brake block unit 1 is shown as a block brake, which is held on a vehicle frame 2 in any known manner.
  • the brake block unit 1 has a pendulum lever 3, which extends essentially vertically and has a bearing 4 on the housing of the brake block unit 1 with its upper end and a bearing with an axis of rotation 5 to a brake block shoe 6 at its lower end.
  • the brake shoe 6 has, on the one hand, a customary, arch-shaped brake block 7 connected to it in an interchangeable manner or held interchangeably, which in the released state of the brake faces the tread 8 of a vehicle wheel 9 rotatable about an axis (not shown) with a ventilation stroke a.
  • the axis of rotation 5 is located near the end remote from the vehicle wheel 9 on the brake shoe 6;
  • a push rod 10 is articulated, which extends essentially radially to the vehicle wheel 9 and via which, in a manner not shown, a contact stroke and a pressing force for the brake shoe or its brake shoe 7 from the brake shoe unit 1 the tread 8 is transferable.
  • the force acts on an only indicated adjusting device 11 via a transmission linkage, also not shown, the push rod 10 can be the threaded spindle of the adjusting device 11.
  • the brake shoe 6 is double-walled, i.e. it has two cheeks 12 offset in the direction of the axis of rotation 5 parallel to the axis of the vehicle wheel 9, as can be seen in FIG. 2. 1, the pendulum lever 3 and the push rod 10 engage between the cheeks 12 and are supported there on the axis of rotation 5.
  • the push rod 10 has, below the axis of rotation 5, a vertically downwardly projecting extension 13 which on both sides carries near its lower end friction surfaces 14 to which friction elements 15 mounted in the cheeks 12 can be pressed.
  • FIG. 2 which shows a section along the dash-dotted line I-I in FIG. 1 on an enlarged scale, shows the brake shoe 6 with the brake shoe 7 removed or omitted; a common spring tongue holder for the brake pad 7 is shown under the reference number 16.
  • the cheeks 12 spanning the distance 13 on both sides according to FIG. 2 have mutually coaxial and parallel to the axis of rotation 5 through holes into which essentially pot-like friction element holders 17 are firmly screwed.
  • a spring 18, preferably designed as a plate spring which, via an intermediate plate 19, loads a friction block 20 in the pressing direction against one of the friction surfaces 14 of the extension 13.
  • the intermediate plates 19 and friction blocks 20 are mounted so as to be displaceable coaxially in the friction element holders 17.
  • the extension 13 is wedge-shaped in the area of the friction elements 13, such that the friction surfaces 14 form wedge surfaces diverging in the direction of distance from the vehicle wheel 9, which wedge surfaces are perpendicular to the axis of the friction elements 15 and thus also to the axis of rotation 5 or axis of the vehicle wheel 9 Mirror plane 21, each run at an angle a; the friction surfaces 14 thus delimit a wedge with the wedge angle 2a.
  • the brake pad 7 is a particularly heavy component, it is therefore obvious according to FIG. 1 that the center of gravity S of the brake shoe 6 is closer to the vehicle wheel 9 than the axis of rotation 5 and the brake shoe 6 thus under the influence of gravity 1 constantly experiences effective torque in the direction of FIG. 1 acting counterclockwise.
  • the friction elements 15 undergo a shift to the right according to the sectional view according to FIG. 2 relative to the stationary extension 13, as a result of which the friction blocks 20 run onto the wedge formed by the friction surfaces 15 and counter to the forces of the springs 18 be pushed back.
  • the angles a are expediently chosen such that the proportion of the movement resistance caused by the pushing back of the friction pads 20 and compression of the springs 18 keeps the balance precisely with the torque exerted by gravity on the brake shoe 6, the torque is thus compensated.
  • the brake shoe 6 is then essentially only rotatable in both directions of rotation against the frictional inhibition, which the friction blocks 20 experience on the friction surfaces 14 by frictional engagement, and the rotational movement therefore essentially opposes the same movement resistances in both directions of rotation.
  • the two friction elements 15 are arranged coaxially, this means that the end faces 22 of the friction pads 20 facing the friction surfaces 14 are inclined at an angle a to a common axis 23 of the friction elements 15.
  • the friction pads 20 must therefore be in a certain rotational position about the axis 23 in the friction elements 15. This is not the case in the embodiment according to FIG. 3, here the friction pads 20 can be in any rotational positions about the axes 23 of the friction elements 15.
  • the friction elements 15 are not arranged coaxially, but rather inclined to one another, such that the two axes 23 of the friction elements 15 intersect approximately in the mirror plane 21; each friction axis 23 is perpendicular to the friction surface 14 assigned to its friction element 15.
  • the friction pads 20 also have end faces 22 on the part of the friction surfaces 14, which are perpendicular to the respective axis 23. 3 corresponds to that of FIG. 2 and therefore need not be described further.
  • the friction pads 20 can assume any rotational position about the axis 23 in the friction elements 15.
  • the push rod 10 has a downwardly projecting extension 26 and an upwardly projecting extension 27 in the region of the axis of rotation 5.
  • the extension 26 ends with a cylindrical friction surface 28 and the extension 27 with a likewise cylindrical friction surface 29.
  • the cylinder axis 30 runs farther, the cylinder axis 31 closer to the vehicle wheel 9 than the axis of rotation 5.
  • the two friction elements 15 are designed similarly to the friction elements according to FIG. 2, only the intermediate plates 19 also have guide sleeves for the springs 18 and mounting sections for the friction blocks 20. 5, the two friction elements 15 are arranged above and below the axis of rotation 5 in the brake block shoe 6, such that their axes 23 are only slightly inclined to the vertical and that the friction blocks 20 can be pressed against the friction surfaces 28 and 29.
  • hysteresis with regard to the torques required for the rotation of the brake shoe 6 in one or the other direction of rotation can occur in all the arrangements described above, but these hysteresis are not further disturbing.
  • friction surfaces 14 and 28 and 29 each form double wedges
  • the friction angle ⁇ or the diameter of the circle 33, that is to say the wedge pitch, is then expediently chosen to be steeper than in the exemplary embodiments described above.
  • the brake pad adjusters comprising the friction pads 20 and the friction surfaces 14, 28, 29 are arranged distributed on the brake pad shoe 6 and on parts firmly connected to the push rod 10.
  • the pendulum lever 3 instead of the latter parts, such that the brake pad actuators act between the brake pad shoe 6 and the pendulum lever 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
EP84111619A 1983-10-11 1984-09-28 Klotzbremse für Schienenfahrzeuge Expired EP0137431B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3336983 1983-10-11
DE19833336983 DE3336983A1 (de) 1983-10-11 1983-10-11 Klotzbremse fuer schienenfahrzeuge

Publications (3)

Publication Number Publication Date
EP0137431A2 EP0137431A2 (de) 1985-04-17
EP0137431A3 EP0137431A3 (enExample) 1985-05-15
EP0137431B1 true EP0137431B1 (de) 1986-12-10

Family

ID=6211563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111619A Expired EP0137431B1 (de) 1983-10-11 1984-09-28 Klotzbremse für Schienenfahrzeuge

Country Status (9)

Country Link
US (1) US4650040A (enExample)
EP (1) EP0137431B1 (enExample)
JP (1) JPS6094865A (enExample)
KR (1) KR920005590B1 (enExample)
AU (1) AU572427B2 (enExample)
CA (1) CA1230832A (enExample)
DE (2) DE3336983A1 (enExample)
ES (2) ES281921Y (enExample)
ZA (1) ZA847937B (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE466906B (sv) * 1989-04-27 1992-04-27 Wabco Holdings Sab Bromsklotshaallararrangemang
JPH0446976U (enExample) * 1990-08-23 1992-04-21
DE4235310C2 (de) * 1992-10-20 1996-07-11 Knorr Bremse Ag Vorrichtung zur Parallelführung des Bremsklotzschuhs einer Klotzbremse
DE19605853C1 (de) 1996-02-16 1997-09-11 Knorr Bremse Systeme Bremsklotzeinheit für Schienenfahrzeuge
JP5284367B2 (ja) * 2008-11-18 2013-09-11 ナブテスコ株式会社 ユニットブレーキ
CN103342129A (zh) * 2013-07-29 2013-10-09 南车株洲电力机车有限公司 一种用于机车制动器的闸瓦托装置
CN104442895A (zh) * 2014-11-26 2015-03-25 南京浦镇海泰制动设备有限公司 一种踏面制动器
CN104477202A (zh) * 2014-11-26 2015-04-01 南京浦镇海泰制动设备有限公司 一种轨道车辆踏面制动器闸瓦托防翻转结构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1643837A (en) * 1927-09-27 Brake structure
US1143671A (en) * 1914-11-28 1915-06-22 American Steel Foundries Adjustable brake-head.
GB111742A (en) * 1917-01-03 1917-12-13 Birmingham Railway Carriage An Improvements in Brake Mechanism for Railway and Tramway Rolling Stock and for other uses.
US1453838A (en) * 1921-08-08 1923-05-01 American Steel Foundries Adjustable brake head
US2474239A (en) * 1944-09-16 1949-06-28 American Steel Foundries Brakehead balancing device
US2545213A (en) * 1945-07-05 1951-03-13 American Steel Foundries Brakehead arrangement
US2496250A (en) * 1945-11-14 1950-01-31 American Steel Foundries Brakehead arrangement
US2516696A (en) * 1948-05-04 1950-07-25 American Steel Foundries Brake head balancing device
DE1605853A1 (de) * 1968-01-12 1975-07-31 Knorr Bremse Gmbh Klotzbremse,insbesondere fuer Schienenfahrzeuge

Also Published As

Publication number Publication date
ES281921U (es) 1985-12-16
JPS6094865A (ja) 1985-05-28
EP0137431A3 (enExample) 1985-05-15
ES281921Y (es) 1986-07-16
KR850004216A (ko) 1985-07-11
ZA847937B (en) 1985-06-26
ES285420Y (es) 1986-07-16
DE3461616D1 (en) 1987-01-22
US4650040A (en) 1987-03-17
CA1230832A (en) 1987-12-29
AU572427B2 (en) 1988-05-05
EP0137431A2 (de) 1985-04-17
KR920005590B1 (ko) 1992-07-09
ES285420U (es) 1985-12-16
DE3336983A1 (de) 1985-04-25
AU3410284A (en) 1985-04-18

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