EP1401758B1 - Cable brake on a speed-limiter for lifts - Google Patents

Cable brake on a speed-limiter for lifts Download PDF

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Publication number
EP1401758B1
EP1401758B1 EP02737714A EP02737714A EP1401758B1 EP 1401758 B1 EP1401758 B1 EP 1401758B1 EP 02737714 A EP02737714 A EP 02737714A EP 02737714 A EP02737714 A EP 02737714A EP 1401758 B1 EP1401758 B1 EP 1401758B1
Authority
EP
European Patent Office
Prior art keywords
brake
cable
cast iron
blocks
lifts
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 - Lifetime
Application number
EP02737714A
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German (de)
French (fr)
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EP1401758A1 (en
Inventor
Peter MÖRI
Walter Windlin
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.)
Inventio AG
Original Assignee
Inventio AG
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Filing date
Publication date
Application filed by Inventio AG filed Critical Inventio AG
Priority to EP02737714A priority Critical patent/EP1401758B1/en
Publication of EP1401758A1 publication Critical patent/EP1401758A1/en
Application granted granted Critical
Publication of EP1401758B1 publication Critical patent/EP1401758B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
    • B66B5/185—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by acting on main ropes or main cables

Definitions

  • the invention relates to a cable brake on a speed limiter for lifts, wherein the cable brake has two brake shoes.
  • Such cable brakes are operated when exceeding an allowable speed of the speed limiter, so that a guided over a pulley of the speed limiter, firmly braked with an elevator car limiter rope braked and a safety gear is triggered, by means of which the elevator car is brought to a standstill.
  • a speed limiter is known with a cable brake, which has a stationary and a movable brake shoe.
  • the movable brake shoe is fastened to a bracket guided in a cable brake housing.
  • Two standing under the action of a respective compression spring levers are hinged at one end to two bolts mounted in the bracket and the other end rotatably mounted on two axles mounted in the cable brake housing.
  • the compression springs are each biased between two discs, wherein the one disc bears against a shoulder of the lever and the other disc on the axis, and provided in the levers slots enable a displacement of the lever and thus the movable brake shoe in the direction of action of the compression springs.
  • the brake shoes consist in rope brakes of the type described above mostly either Alubronze (CuAl) or ductile iron (GGG). With brake shoes made of Alubronze a good braking effect is achieved. The heat released by the braking is dissipated quickly, but the wear is considerable with long braking distances. The brake shoes made of nodular cast iron have a less good braking effect. They are less worn, but can dissipate the brake heat worse. In addition, wear on the governor rope must be expected.
  • the invention has for its object to propose a rope brake according to the preamble, come in the above-mentioned disadvantages of the brake shoe material less effect.
  • the one brake shoe made of Alubronze and the other brake shoe made of ductile iron or gray cast iron are made of Alubronze and the other brake shoe made of ductile iron or gray cast iron.
  • Particularly powerful embodiments also have two brake shoes made of different materials, each one of the brake shoes consists of a ceramic-containing material.
  • both brake shoes consist of a ceramic-containing material.
  • 1 designates a brake housing that consists of two side parts 2, 3 with bent flanges 2. 1, 3. 1.
  • the side parts 2, 3 are connected to each other via a spacer 4 and a spacer tube 5.
  • an immovable brake shoe 6 is fixed, which consists for example of ductile iron (GGG) or gray cast iron.
  • GGG ductile iron
  • CuAl Alubronze
  • existing movable brake shoe 7 is connected to a guided between the side parts 2,3 of the brake housing 1 guide part 8.
  • Two telescopic levers 9 each consist of a cylinder part 9.1 and a piston part 9.2.
  • the cylinder parts 9.1 are hinged to two, mounted on the guide part 8 bolts 10, while the piston parts 9.2 are rotatably mounted on two arranged in the brake housing 1 axles 11.
  • compression springs 12 are arranged, which at the ends via washers 13 on the axes 11 and supported on the cylinder parts 9.1.
  • a tension spring 16 is stretched.
  • the traverse 14 is supported on an actuator of a speed limiter, not shown, so that the components guided on the telescopic levers 9 - Traverse 14, guide member 8 and brake shoe 7 - are held in an upper position.
  • said actuator When exceeding the permissible speed of an elevator car said actuator is shifted so that it no longer supports the cross member 14, so that the guide member 8 falls with the movable brake shoe 7 down and the brake shoe 7 by the compression springs 12 against a between her and the immovable brake shoe 6 running governor rope 17 is pressed. As a result, the governor rope 17 is braked and triggered a safety gear.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Abstract

A lower rate of wear of brake blocks and a speed limiter cable for a lift speed limiter brake apparatus and thus a longer service life can be achieved with a cable brake having brake blocks of different materials. In a preferred embodiment, one of the brake blocks is of aluminium-bronze and the other brake block is of nodular cast iron or soft cast iron. In further embodiments, one or both of the brake blocks may be formed of a ceramic-containing material.

Description

Die Erfindung betrifft eine Seilbremse an einem Geschwindigkeitsbegrenzer für Aufzüge, wobei die Seilbremse zwei Bremsbacken aufweist.The invention relates to a cable brake on a speed limiter for lifts, wherein the cable brake has two brake shoes.

Derartige Seilbremsen werden beim Ueberschreiten einer zulässigen Geschwindigkeit vom Geschwindigkeitsbegrenzer betätigt, so dass ein über eine Seilscheibe des Geschwindigkeitsbegrenzers geführtes, mit einer Aufzugskabine fest verbundenes Begrenzerseil abgebremst und eine Fangvorrichtung ausgelöst wird, mittels welcher die Aufzugskabine zum Stillstand gebracht wird.Such cable brakes are operated when exceeding an allowable speed of the speed limiter, so that a guided over a pulley of the speed limiter, firmly braked with an elevator car limiter rope braked and a safety gear is triggered, by means of which the elevator car is brought to a standstill.

Mit der Deutschen Patentschrift 25 28 067 ist ein Geschwindigkeitsbegrenzer mit einer Seilbremse bekannt geworden, die eine unbewegliche und eine bewegliche Bremsbacke aufweist. Die bewegliche Bremsbacke ist an einem in einem Seilbremsgehäuse geführten Bügel befestigt. Zwei unter der Einwirkung je einer Druckfeder stehende Hebel sind einenends an zwei im Bügel gelagerten Bolzen angelenkt und anderenends an zwei im Seilbremsgehäuse gelagerten Achsen drehbar gelagert. Die Druckfedern sind je zwischen zwei Scheiben vorgespannt, wobei die eine Scheibe an einer Schulter des Hebels und die andere Scheibe an der Achse anliegt, und wobei in den Hebeln vorgesehene Langlöcher eine Verschiebung der Hebel und damit auch der beweglichen Bremsbacke in Wirkungsrichtung der Druckfedern ermöglichen. Am Bügel ist ein Betätigungsblech vorgesehen, mittels welchem ein Betätigungsarm des Geschwindigkeitsbegrenzers die bewegliche Bremsbacke aus einer Offenstellung in eine Bremsstellung verschieben kann. Die Bremsbacken bestehen bei Seilbremsen der vorstehend beschriebenen Art meistens entweder aus Alubronze (CuAl) oder aus Sphäroguss (GGG). Mit Bremsbacken aus Alubronze wird eine gute Bremswirkung erreicht. Die durch die Bremsung freiwerdende Wärme wird rasch abgeführt, jedoch ist der Verschleiss bei langen Bremswegen beträchtlich. Die Bremsbacken aus Sphäroguss haben eine weniger gute Bremswirkung. Sie werden weniger verschlissen, können jedoch die Bremswärme schlechter abführen. Ausserdem muss mit Verschleiss am Begrenzerseil gerechnet werden.With the German Patent 25 28 067 a speed limiter is known with a cable brake, which has a stationary and a movable brake shoe. The movable brake shoe is fastened to a bracket guided in a cable brake housing. Two standing under the action of a respective compression spring levers are hinged at one end to two bolts mounted in the bracket and the other end rotatably mounted on two axles mounted in the cable brake housing. The compression springs are each biased between two discs, wherein the one disc bears against a shoulder of the lever and the other disc on the axis, and provided in the levers slots enable a displacement of the lever and thus the movable brake shoe in the direction of action of the compression springs. On the bracket an actuating plate is provided, by means of which an actuating arm of the speed limiter can move the movable brake shoe from an open position to a braking position. The brake shoes consist in rope brakes of the type described above mostly either Alubronze (CuAl) or ductile iron (GGG). With brake shoes made of Alubronze a good braking effect is achieved. The heat released by the braking is dissipated quickly, but the wear is considerable with long braking distances. The brake shoes made of nodular cast iron have a less good braking effect. They are less worn, but can dissipate the brake heat worse. In addition, wear on the governor rope must be expected.

Der Erfindung liegt die Aufgabe zugrunde, eine Seilbremse gemäss Oberbegriff vorzuschlagen, bei der vorstehend erwähnte Nachteile des Bremsbackenmaterials weniger zur Auswirkung kommen.The invention has for its object to propose a rope brake according to the preamble, come in the above-mentioned disadvantages of the brake shoe material less effect.

Diese Aufgabe wird durch die in den unabhängigen Patentansprüchen 1 und 4 angegebene Erfindung gelöst.This object is achieved by the invention specified in the independent claims 1 and 4.

In einer bevorzugten Ausführung besteht die eine Bremsbacke aus Alubronze und die andere Bremsbacke aus Sphäroguss oder Grauguss.In a preferred embodiment, the one brake shoe made of Alubronze and the other brake shoe made of ductile iron or gray cast iron.

Besonders leistungsfähige Ausführungen weisen ebenfalls zwei Bremsbacken aus unterschiedlichen Materialien auf, wobei jeweils eine der Bremsbacken aus einem keramikhaltigen Material besteht.Particularly powerful embodiments also have two brake shoes made of different materials, each one of the brake shoes consists of a ceramic-containing material.

Bei einer weiteren Ausführung bestehen beide Bremsbacken aus einem keramikhaltigen Material.In a further embodiment, both brake shoes consist of a ceramic-containing material.

Die mit der Erfindung erzielten Vorteile sind darin zu sehen, dass die günstigen Eigenschaften beider Materialien ausgenutzt werden können. Beim Bremsen wird vor allem durch die Bremsbacke aus Alubronze die Wärme vom Begrenzerseil weggeführt, was sich positiv auf den Seilverschleiss auswirkt. Die Bremsbacke aus Sphäroguss gewährleistet einen geringen Verschleiss. Die Vorteile der weiteren Ausführung liegen in der hohen Verschleissfestigkeit und Wärmebeständigkeit des keramikhaltigen Materials.The advantages achieved by the invention can be seen in the fact that the favorable properties of both materials can be exploited. When braking, especially through the brake shoe made of Alubronze, the heat from the governor rope led away, which has a positive effect on the rope wear. The brake shoe made of ductile iron ensures low wear. The advantages of further execution lie in the high wear resistance and heat resistance of the ceramic material.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispieles im Zusammenhang mit der Zeichnung näher erläutert.In the following the invention will be explained in more detail using an exemplary embodiment in conjunction with the drawing.

Es zeigen:

Fig.1
eine Ansicht der Seilbremse,
Fig.2
eine Ansicht der Seilbremse in Richtung A der Fig.1,
Fig.3
eine Ansicht der Seilbremse in Richtung B der Fig.1.
Show it:
Fig.1
a view of the rope brake,
Fig.2
a view of the rope brake in the direction A of Figure 1,
Figure 3
a view of the rope brake in the direction B of Figure 1.

In den Fig. 1 bis 3 ist mit 1 ein Bremsgehäuse bezeichnet, dass aus zwei Seitenteilen 2,3 mit angebogenen Flanschen 2.1, 3.1 besteht. Die Seitenteile 2, 3 sind über ein Distanzstück 4 und ein Distanzrohr 5 miteinander verbunden. Am Distanzstück 4 ist eine unbewegliche Bremsbacke 6 befestigt, die beispielsweise aus Sphäroguss (GGG) oder Grauguss besteht. Eine beispielsweise aus Alubronze (CuAl) bestehende bewegliche Bremsbacke 7 ist mit einem zwischen den Seitenteilen 2,3 des Bremsgehäuses 1 geführten Führungsteil 8 verbunden.In FIGS. 1 to 3, 1 designates a brake housing that consists of two side parts 2, 3 with bent flanges 2. 1, 3. 1. The side parts 2, 3 are connected to each other via a spacer 4 and a spacer tube 5. At the spacer 4 an immovable brake shoe 6 is fixed, which consists for example of ductile iron (GGG) or gray cast iron. An example of Alubronze (CuAl) existing movable brake shoe 7 is connected to a guided between the side parts 2,3 of the brake housing 1 guide part 8.

Zwei teleskopartige Hebel 9 bestehen aus je einem Zylinderteil 9.1 und einem Kolbenteil 9.2. Die Zylinderteile 9.1 sind an zwei, am Führungsteil 8 gelagerten Bolzen 10 angelenkt, während die Kolbenteile 9.2 an zwei im Bremsgehäuse 1 angeordneten Achsen 11 drehbar gelagert sind. Auf den Kolbenteilen 9.2 sind Druckfedern 12 angeordnet, die sich an den Enden über Scheiben 13 auf die Achsen 11 bzw. auf die Zylinderteile 9.1 abstützen. Zwischen einer am Führungsteil 8 befestigten Traverse 14 und einem am Bremsgehäuse 1 angeordneten Winkel 15 ist eine Zugfeder 16 gespannt. Die Traverse 14 stützt sich auf ein Betätigungsglied eines nicht dargestellten Geschwindigkeitsbegrenzers ab, so dass die an den teleskopartigen Hebeln 9 geführten Komponenten - Traverse 14, Führungsteil 8 und Bremsbacke 7 - in einer oberen Stellung gehalten sind.
Bei Ueberschreiten der zulässigen Geschwindigkeit einer Aufzugskabine wird das genannte Betätigungsglied so verschoben, dass es die Traverse 14 nicht mehr stützt, so dass das Führungsteil 8 mit der beweglichen Bremsbacke 7 nach unten fällt und die Bremsbacke 7 durch die Druckfedern 12 gegen ein zwischen ihr und der unbeweglichen Bremsbacke 6 laufendes Begrenzerseil 17 gedrückt wird. Dadurch wird das Begrenzerseil 17 abgebremst und eine Fangvorrichtung ausgelöst.Two telescopic levers 9 each consist of a cylinder part 9.1 and a piston part 9.2. The cylinder parts 9.1 are hinged to two, mounted on the guide part 8 bolts 10, while the piston parts 9.2 are rotatably mounted on two arranged in the brake housing 1 axles 11. On the piston parts 9.2 compression springs 12 are arranged, which at the ends via washers 13 on the axes 11 and supported on the cylinder parts 9.1. Between a fortified on the guide member 8 Traverse 14 and arranged on the brake housing 1 angle 15 a tension spring 16 is stretched. The traverse 14 is supported on an actuator of a speed limiter, not shown, so that the components guided on the telescopic levers 9 - Traverse 14, guide member 8 and brake shoe 7 - are held in an upper position.
When exceeding the permissible speed of an elevator car said actuator is shifted so that it no longer supports the cross member 14, so that the guide member 8 falls with the movable brake shoe 7 down and the brake shoe 7 by the compression springs 12 against a between her and the immovable brake shoe 6 running governor rope 17 is pressed. As a result, the governor rope 17 is braked and triggered a safety gear.

Es ist auch möglich, für die unbewegliche Bremsbacke 6 Alubronze (CuAl), und für die bewegliche Bremsbacke 7 Sphäroguss (GGG) oder Grauguss (GG) zu verwenden.
Auch kann anstelle der unterschiedlichen Metalle bzw. Legierungen für eine oder für beide Bremsbacken ein keramikhaltiges Material verwendet werden.It is also possible to use Alubronze (CuAl) for the immovable brake shoe 6 and nodular cast iron (GGG) or cast iron (GG) for the movable brake shoe 7.
Also, instead of the different metals or alloys for one or both brake shoes, a ceramic-containing material can be used.

Es liegt im Rahmen der Erfindung, Bremsbacken gleichen Materials mit Bremsbelägen unterschiedlichen Materials auszustatten, wobei vorzugsweise die vorstehend genannten Materialien für die Bremsbeläge verwendet werden.It is within the scope of the invention to provide brake shoes of the same material with brake pads of different material, wherein preferably the aforementioned materials are used for the brake pads.

Claims (7)

  1. Cable brake at a speed limiter for lifts, wherein the cable brake comprises two brake blocks (6, 7), characterised in that one brake block (6, 7) consists of a first material and the other brake block (6, 7) consists of a second material, wherein the first material has better heat conduction properties than the second and the second material has a higher wear resistance than the first.
  2. Cable brake according to claim 1, characterised in that one brake block (6, 7) consists of aluminium-bronze and the other brake block (6, 7) consists of nodular cast iron or soft cast iron.
  3. Cable brake according to claim 2, characterised in that the non-movable brake block (6) consists of nodular cast iron or soft cast iron and the movable brake block (7) consists of aluminium-bronze.
  4. Cable brake according to claim 2, characterised in that the non-movable brake block (6) consists of aluminium-bronze and the movable brake block (7) consists of nodular cast iron or soft cast iron.
  5. Cable brake according to claim 1, characterised in that one of the two brake blocks (6, 7) consists of a material containing ceramic.
  6. Cable brake according to claim 1, characterised in that one of the two brake blocks (6, 7) consists of material containing ceramic and the other brake block (6, 7) consists of aluminium-bronze, nodular cast iron or soft cast iron.
  7. Cable brake of a speed limiter for lifts, wherein the cable brake comprises two brake blocks (6, 7), characterised in that the brake blocks (6, 7) consist of a material containing ceramic.
EP02737714A 2001-06-29 2002-06-25 Cable brake on a speed-limiter for lifts Expired - Lifetime EP1401758B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02737714A EP1401758B1 (en) 2001-06-29 2002-06-25 Cable brake on a speed-limiter for lifts

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01810631 2001-06-29
EP01810631 2001-06-29
PCT/CH2002/000340 WO2003002446A1 (en) 2001-06-29 2002-06-25 Cable brake on a speed-limiter for lifts
EP02737714A EP1401758B1 (en) 2001-06-29 2002-06-25 Cable brake on a speed-limiter for lifts

Publications (2)

Publication Number Publication Date
EP1401758A1 EP1401758A1 (en) 2004-03-31
EP1401758B1 true EP1401758B1 (en) 2006-03-29

Family

ID=8183991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02737714A Expired - Lifetime EP1401758B1 (en) 2001-06-29 2002-06-25 Cable brake on a speed-limiter for lifts

Country Status (12)

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US (1) US20040149524A1 (en)
EP (1) EP1401758B1 (en)
JP (1) JP2004530612A (en)
CN (1) CN1290753C (en)
AT (1) ATE321724T1 (en)
CA (1) CA2448057A1 (en)
DE (1) DE50206232D1 (en)
ES (1) ES2261679T3 (en)
HK (1) HK1065012A1 (en)
PT (1) PT1401758E (en)
TW (1) TWI269774B (en)
WO (1) WO2003002446A1 (en)

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
JP4904012B2 (en) * 2005-04-08 2012-03-28 東芝エレベータ株式会社 Rope brake device for elevator
DE602005008205D1 (en) * 2005-05-09 2008-08-28 Dynatech Dynamics & Technology Safety catch for a gradual bidirectional safety device
BRPI0601926B1 (en) * 2005-06-17 2018-06-12 Inventio Aktiengesellschaft BRAKE PARACHUTE DEVICE
AU2007224584A1 (en) 2006-03-16 2007-09-20 Niconovum Ab Improved snuff composition
US9321611B2 (en) * 2011-04-19 2016-04-26 Otis Elevator Company Elevator brake having a brake release feature
EP3328772B1 (en) * 2015-07-29 2020-05-06 Otis Elevator Company Safety block for elevator
ES2698365T3 (en) * 2015-09-12 2019-02-04 Otis Elevator Co Elevator speeding regulator
CN109963805B (en) 2016-11-10 2021-02-26 因温特奥股份公司 Cable brake, elevator car and elevator system
CN106429709A (en) * 2016-12-09 2017-02-22 佛山市南海区永通力电梯配件厂（普通合伙） Rope gripper
CN110626905B (en) * 2018-06-22 2021-01-15 株式会社日立制作所 Elevator and speed limiter thereof
CN110759203B (en) * 2019-09-25 2022-05-13 浙江威特电梯有限公司 Control device with power failure emergency and electric brake release integration

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US2122405A (en) * 1937-01-23 1938-07-05 Raybestos Manhattan Inc Metallic inlaid friction surface
US3239319A (en) * 1963-05-10 1966-03-08 American Brake Shoe Co Cast railroad brake shoe and method of making same
DE2251124A1 (en) * 1971-11-01 1973-05-03 Us Elevator Corp OVER-SPEED ROPE DECELERATION DEVICE
US4807728A (en) * 1986-03-20 1989-02-28 Hitachi Metals, Ltd. Brake member and method of manufacturing same
DE3802488C2 (en) * 1988-01-28 1999-06-24 Stihl Maschf Andreas Brake band for stopping the saw chain of a motor chain saw
US5299661A (en) * 1992-11-03 1994-04-05 Otis Elevator Company Mechanical overspeed safety device
JPH06346932A (en) * 1993-06-08 1994-12-20 Akebono Brake Ind Co Ltd Frictional material
US5957251A (en) * 1996-05-02 1999-09-28 The Dow Chemical Company Brake or clutch components having a ceramic-metal composite friction material
US6364072B1 (en) * 1997-04-28 2002-04-02 Alliedsignal Bremsbelag Gmbh Sintered material for a magnetic track brake
JP2004211888A (en) * 2002-12-24 2004-07-29 Inventio Ag Brake-shoe for braking cable

Also Published As

Publication number Publication date
CN1290753C (en) 2006-12-20
US20040149524A1 (en) 2004-08-05
TWI269774B (en) 2007-01-01
DE50206232D1 (en) 2006-05-18
WO2003002446A1 (en) 2003-01-09
ATE321724T1 (en) 2006-04-15
CN1516675A (en) 2004-07-28
PT1401758E (en) 2006-06-30
ES2261679T3 (en) 2006-11-16
HK1065012A1 (en) 2005-02-08
EP1401758A1 (en) 2004-03-31
CA2448057A1 (en) 2003-01-09
JP2004530612A (en) 2004-10-07

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