EP1751048A1 - Frein de securite - Google Patents

Frein de securite

Info

Publication number
EP1751048A1
EP1751048A1 EP05749879A EP05749879A EP1751048A1 EP 1751048 A1 EP1751048 A1 EP 1751048A1 EP 05749879 A EP05749879 A EP 05749879A EP 05749879 A EP05749879 A EP 05749879A EP 1751048 A1 EP1751048 A1 EP 1751048A1
Authority
EP
European Patent Office
Prior art keywords
brake
safety brake
linear motor
measuring sensor
safety
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.)
Granted
Application number
EP05749879A
Other languages
German (de)
English (en)
Other versions
EP1751048B1 (fr
Inventor
Herbert Seeger
Udo Meller
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.)
Ortlinghaus Werke GmbH
Original Assignee
Ortlinghaus Werke GmbH
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 Ortlinghaus Werke GmbH filed Critical Ortlinghaus Werke GmbH
Publication of EP1751048A1 publication Critical patent/EP1751048A1/fr
Application granted granted Critical
Publication of EP1751048B1 publication Critical patent/EP1751048B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B29/00—Safety devices of escalators or moving walkways

Definitions

  • the present invention relates to a safety brake according to the preamble of the main claim.
  • Such safety brakes are used in mechanical engineering to brake known loads to a standstill. In the event that the braking process begins, the load to be braked and still moved must come to a standstill.
  • the load torque which is impressed by external forces and which exists due to the moving load is countered by the braking torque which arises between the brake rotor and brake stator.
  • the braking torque therefore continuously leads to the complete destruction of the kinetic energy presented by the load torque.
  • the safety brake is then in the brake lock position, with static friction between the brake rotor and brake stator.
  • Such safety brakes are known, for example, as spring-operated brakes, which are released by a pressure medium.
  • the springs act as force transmitters that can even be supported in their force by hydraulic components.
  • the function of these force transmitters is in any case canceled by the piston-cylinder unit when the safety brake is shifted into its brake release position.
  • BESTATIGUNGSKOPIE The braking function is initiated via the spring force, while the pressure medium introduced counteracts this spring force in order to release the safety brake again.
  • active brakes can also be considered, in which, in addition to or instead of spring force actuation, the brake function is brought about by a hydraulic or pneumatic pressure medium.
  • Brakes based on the reverse principle can also be used without restricting the invention. This is to be understood to mean that the brakes are shifted into the brake release position by the force transmitter while they are acted upon by the pressure medium in the direction of the brake blocking position.
  • Such safety brakes are used, for example, in mechanical engineering to brake loads, e.g. in escalators, presses, transfer belts or the like.
  • the invention solves this problem with the features of the main claim.
  • the advantage of the invention is that the effective braking torque between the maximum braking torque, in which friction between the brake stator and the brake rotor occurs and the value ZERO can be set in an adjustable manner to the respective external operating conditions, which of course cannot be constant over time To take into account.
  • This advantage is achieved in that at least one predetermined operating parameter, which occurs as a significant influencing variable on the safety brake in the operating range outside the brake lock position, is detected by a suitable measuring sensor and is fed back as a manipulated variable into the adjusting mechanism of the safety brake, so that the braking function of the safety brake corresponds to the operating parameters recorded in each case can be adapted.
  • Such measures can e.g. be necessary to take into account the time-dependent course of the braking torque depending on the respective state of wear of the brake pads.
  • Further exemplary embodiments relate to the consideration of any leaks in the pressure-pressurized system.
  • these are hydraulic or pneumatic systems which are naturally also subject to a certain amount of wear and are therefore exposed to the risk of leakage.
  • the piston-cylinder unit for the displacement of the brake stator relative to the brake rotor would travel through a larger free travel if - as before - the corresponding operating parameter was not recorded and returned to the sensor system.
  • the advantage of the invention is therefore also a constant action independent of time and wear.
  • the safety brake which is supplemented by further exemplary embodiments.
  • certain pre-pressures can also be realized, so that the maximum braking force applied via the force transmitter is limited.
  • a linear motor can easily be arranged in the connection between the measuring sensor and the sensor system, which acts on the piston-cylinder unit as a function of the one or more operating parameters (s) recorded in each case.
  • electromagnetic direct drives that are controlled by a servo controller can be considered as linear motors.
  • Such motors consist of only the rotor and stator and are controlled with high dynamics by the servo controller.
  • the detected operating parameters can be impressed on the servo controller via simple electrical circuits, if necessary via appropriate converters, as electrical input signals. If electrically operated linear motors are used, they offer the additional advantage of freedom from wear.
  • the operating range of the safety brake according to the invention within which the respective braking torque is a function proportional to the measured operating parameter (s), is always limited to the range of sliding friction between the brake rotor and brake stator ,
  • the invention should not be used in the area which lies in the transition area between sliding friction and static friction as with ABS, but that a fixed load torque is always assumed, which is to be counteracted by the specified braking torque that the braking torque increases with increasing load torque and vice versa.
  • the respective braking torque expediently runs as a function of the time required to brake the load torque to a standstill according to a rule that can be mathematically described as strictly monotonous, all the masses involved coming to rest after the plant has come to a standstill.
  • the rotor of the linear motor be prepositioned by another linear motor.
  • a predetermined pressure can be built up in the hydraulic or pneumatic system and thus a certain limit torque can be specified which is less than the maximum possible braking torque.
  • using a spring-loaded and fluidically ventilated safety brake can be via the another linear motor to relieve the brake springs by a predetermined pressure and in this way simply specify a limit torque.
  • the further linear motor forms a rear stop for the rotor of the first linear motor, which can be acted upon again and again from this zero point, so to speak.
  • An embodiment is preferably used for the further linear motor, which is held in the pre-positioned position with self-locking.
  • a preferred embodiment consists in a spindle motor.
  • This embodiment offers advantages particularly when e.g. due to a power failure, the previously determined braking torque must then be available again.
  • predetermined functions of the safety brake can be stored in the operating area between the brake release position and outside the brake lock position in function blocks, which can be seated in the connection between the measuring sensor and the encoder system using appropriate converters.
  • changing external loads should also be mentioned here if it makes sense to influence the braking function depending on the external loads.
  • the invention can also be used on clutches, provided that they serve as safety clutches, for example as slip clutches with a predetermined release torque. The above and the following description apply accordingly to these safety couplings.
  • Figure 1 shows a first embodiment of the invention
  • Figure 2 shows an embodiment of the invention with a functional network pressure-time
  • FIG. 3 shows an embodiment of the invention with path-dependent control
  • FIG 4 shows an embodiment of the invention with functional network speed-force
  • FIG. 5 shows an embodiment of the invention with functional network torque-time
  • Figure 6 shows an embodiment of the invention with wear monitoring
  • FIG. 7 shows an embodiment of the invention with two series-connected linear motors
  • the figures show a safety brake 1.
  • a safety brake 1 there is a stationary one Brake stator 3 in front with a brake rotor 2 rotating relative thereto.
  • One or more brake pads are arranged between the brake stator 3 and the brake rotor 2 so that the acting load torque can be braked to a standstill by the opposite braking torque.
  • the stationary arrangement of the brake stator 3 serves with the onset of the braking action as an abutment in order to guide the forces and moments introduced by the load torque into the brake rotor 2 into the foundation.
  • it is a spring-loaded and hydraulically ventilated safety brake.
  • the braking torque is predetermined by the force of a force generator 4.
  • a force generator 4 During the relative rotation between brake rotor 2 and brake stator 3, only sliding friction is present on the brake pads, which only changes into static friction when the brake is at a standstill.
  • a plurality of coil springs are provided as the force transmitter 4, which press the axially movable but not rotating part of the brake stator 3 against the brake surfaces of the brake rotor 2 provided with brake pads as soon as the braking effect is to start.
  • the braking effect is canceled here by pressurizing a piston-cylinder unit 5 filled with a pressure medium, by applying an axial relative movement between the brake rotor 2 and the brake stator 3 due to the pressurization with pressure medium, and in this way the respective braking torque can be changed until the brake release position is reached.
  • an encoder system 7 is used, which is connected to the piston-cylinder unit 5 via a pressure medium line 6.
  • the transmitter system 7 is designed here as a piston-cylinder unit and is connected to a tank 8 which always replenishes the pressure medium located in the closed space between the piston-cylinder unit 5 and the piston-cylinder unit 7 as required.
  • the safety brake 1 comprises at least one measuring sensor 9a-k, which serves to detect at least one predetermined operating parameter in the area of the axial relative movement between the brake rotor 2 and the brake stator 3 and in any case outside the operating range defined by the brake lock position.
  • the measuring sensor 9a-k interacts with the encoder system 7 in such a way that in this operating range and in any case outside the brake lock position, the respective braking torque is a function of the operating parameter recorded in each case, the braking torque predetermined by the coil springs - here subtractively - being supplemented according to a mathematical one Function according to which the transmitter system 7 changes the pressure in the piston-cylinder unit 5 in a directly proportional or indirectly proportional dependence on the value of the operating parameter recorded in each case.
  • the brake lock position is understood to mean the position in which the state of static friction exists between the brake rotor 2 and the brake stator 3.
  • the present invention differs from this known one State of the art in that the respective operating range is to be defined exclusively by the sliding friction present.
  • the encoder system 7 is also designed here as a piston-cylinder unit and is acted upon by a linear motor 10, which is located in the connection between the measuring sensor 9a-k and the encoder system 7.
  • the linear motor 10 is controlled by a control unit, which contains at least the one recorded operating parameter 9 a-k as a necessary input variable.
  • an upstream servo controller 11 which, if necessary via a corresponding converter, receives the recorded operating parameter (s) as an input signal.
  • Simple linear signal dependencies can be achieved in this way, in particular for linear motors 10 with an electric drive, and the electrical drive for the linear motor 10 is subject to practically no wear. It is additionally proposed that the interaction between the measuring sensor 9a-k and the transmitter system 7 always remain limited to the operating range of the sliding friction between the brake rotor 2 and the brake stator 3 according to a predetermined function.
  • a strictly monotonous function is to be understood as a function course in which two arbitrarily successive abscissa values can always be assigned two ordinate values that only become smaller or larger, so that such a function has practically no turning points.
  • the rotor of the linear motor 10 is prepositioned by a further linear motor 12.
  • the further linear motor 12 either engages and displaces the housing of the linear motor 10 with its respective rotor pitch, or the further linear motor 12 directly engages the rotor of the linear motor 10 while the stator of the linear motor 10 is arranged in a stationary manner.
  • the rotor of the linear motor 10 is prepositioned by the further linear motor 12.
  • the further linear motor 12 is designed as a spindle motor, the spindle 13 of which is self-locking in each position corresponding to the prepositioning.
  • the spindle 13 can form a rear stop 14 for the rotor of the linear motor 10.
  • FIGS. 2, 4 and 5 show that the function of the operating parameter shown and recorded as an example is stored in a function block 15 which is located in the connection between the measuring sensor 9a-k and the transmitter system 7.
  • predetermined functional relationships can be driven from the recorded operating parameter (s) with regard to the desired braking torque.
  • FIGS. 1, 2, 3, 4, 5, 6 and 7 show measuring sensors 9a, 9b which are used to record state variables internal to the pressure medium.
  • FIGS. 3, 4 and 6 show exemplary embodiments in which measuring sensors 9c to j are provided, which are used to detect mechanical state variables of the brake.
  • the respective feed is detected in the piston-cylinder unit 5, which e.g. can be seen as equivalent to the maximum specifiable braking torque.
  • the speed is detected on the brake rotor 2 via a corresponding sensor 9j.
  • the brake wear present in each case is detected by a sensor 9e and the piston-cylinder unit 5 is readjusted accordingly.
  • FIG. 5 also shows an exemplary embodiment in which a measuring sensor 9k is used to record the respectively acute load torque in order to readjust the braking force accordingly.
  • the present invention is not limited to the exemplary embodiments shown, as long as the operating parameters are recorded in the operating range that lies outside the brake lock position.

Landscapes

  • Braking Arrangements (AREA)

Abstract

L'invention concerne un frein de sécurité (1), dans lequel un paramètre de fonctionnement est déterminé par un détecteur de mesure à l'intérieur de chaque position relative entre le rotor du frein (2) et le stator du frein (3), qui se trouve à l'extérieur de la position de blocage de frein par liaison de forme. Ledit paramètre de fonctionnement est appliqué au moyen d'un système transmetteur (7) de manière à solliciter une unité piston-cylindre (5) entraînant la position de libération du frein, ce qui permet de remplir une corrélation fonctionnelle dans chaque partie de travail du frein de sécurité (1), qui se trouve à l'extérieur de la position de blocage du frein.
EP05749879A 2004-05-19 2005-05-18 Frein de securite Expired - Fee Related EP1751048B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410025296 DE102004025296A1 (de) 2004-05-19 2004-05-19 Sicherheitsbremse
PCT/EP2005/005395 WO2005113404A1 (fr) 2004-05-19 2005-05-18 Frein de securite

Publications (2)

Publication Number Publication Date
EP1751048A1 true EP1751048A1 (fr) 2007-02-14
EP1751048B1 EP1751048B1 (fr) 2011-04-06

Family

ID=35106783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05749879A Expired - Fee Related EP1751048B1 (fr) 2004-05-19 2005-05-18 Frein de securite

Country Status (4)

Country Link
EP (1) EP1751048B1 (fr)
DE (2) DE102004025296A1 (fr)
TW (1) TW200538652A (fr)
WO (1) WO2005113404A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018100644U1 (de) * 2018-02-06 2019-05-09 Pintsch Bubenzer Gmbh Verschleissnachstellungsanordnung für Sicherheitsbremse

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007060286A1 (de) * 2007-12-12 2009-06-18 Ortlinghaus-Werke Gmbh Sicherheitsbremse
EP2896850B1 (fr) * 2014-01-21 2017-03-15 Ortlinghaus-Werke GmbH Système de sécurité pour éléments de construction à entraînement

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
DE811151C (de) * 1948-10-09 1951-08-16 Elektro Mechanik G M B H Einrichtung zur Bremsregelung elektrischer Antriebe, insbesondere von Hebezeugen
CH537539A (de) * 1972-07-26 1973-05-31 Inventio Ag Lastabhängige Bremsvorrichtung für Fördereinrichtungen
JPH06104448B2 (ja) * 1986-07-07 1994-12-21 本田技研工業株式会社 車両用電動ブレーキ装置
US4702358A (en) * 1986-10-10 1987-10-27 Caterpillar Inc. Clutch brake steering control
DE3917594C2 (de) * 1988-09-10 2002-02-07 Bongers & Deimann Aufzugbremse
US5277278A (en) * 1992-02-18 1994-01-11 Otis Elevator Company Escalator caliper brake assembly with adjustable braking torque
DE4320204A1 (de) * 1993-06-18 1994-12-22 Fichtel & Sachs Ag Stellantrieb für eine Kraftfahrzeug-Reibungskupplung
DE4320205A1 (de) * 1993-06-18 1994-12-22 Fichtel & Sachs Ag Stellantrieb für eine Kraftfahrzeug-Reibungskupplung
DE19723897A1 (de) * 1997-06-05 1998-12-10 O & K Rolltreppen Gmbh Sicherheitseinrichtung für Personenförderanlagen
DE19754491A1 (de) * 1997-12-09 1999-06-17 Stromag Ag Federdruckbremse
US6585088B1 (en) * 2000-05-10 2003-07-01 Poclain Hydraulics Industrie Braking system for braking a rotor relative to a stator
DE10347410A1 (de) * 2002-10-19 2004-04-29 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Verfahren, Vorrichtung und deren Verwendung zum Betrieb eines Kraftfahrzeuges

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005113404A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202018100644U1 (de) * 2018-02-06 2019-05-09 Pintsch Bubenzer Gmbh Verschleissnachstellungsanordnung für Sicherheitsbremse

Also Published As

Publication number Publication date
WO2005113404A1 (fr) 2005-12-01
TW200538652A (en) 2005-12-01
EP1751048B1 (fr) 2011-04-06
DE102004025296A1 (de) 2005-12-08
DE502005011221D1 (de) 2011-05-19

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