WO2020057911A1 - Système de mesure pouvant être équipé ultérieurement pour la détermination d'une usure d'une garniture de frein d'un frein à friction - Google Patents

Système de mesure pouvant être équipé ultérieurement pour la détermination d'une usure d'une garniture de frein d'un frein à friction Download PDF

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Publication number
WO2020057911A1
WO2020057911A1 PCT/EP2019/072811 EP2019072811W WO2020057911A1 WO 2020057911 A1 WO2020057911 A1 WO 2020057911A1 EP 2019072811 W EP2019072811 W EP 2019072811W WO 2020057911 A1 WO2020057911 A1 WO 2020057911A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
measuring system
sensor device
retrofittable
carrier
Prior art date
Application number
PCT/EP2019/072811
Other languages
German (de)
English (en)
Inventor
Alexander Fuchs
Alexander Werth
Michael Blessing
Original Assignee
Knorr-Bremse Systeme für Nutzfahrzeuge 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 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH filed Critical Knorr-Bremse Systeme für Nutzfahrzeuge GmbH
Publication of WO2020057911A1 publication Critical patent/WO2020057911A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • F16D66/026—Apparatus for indicating wear using electrical detection or indication means indicating different degrees of lining wear
    • F16D66/027—Sensors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
    • F16D66/023—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness directly sensing the position of braking members

Definitions

  • Retrofittable measuring system for determining wear of a
  • the invention relates to a retrofittable measuring system for determining wear of a brake lining of a friction brake.
  • Continuously operating measuring systems also continuously or quasi-continuously output a current wear value of a brake pad, the one
  • the degree of wear of the brake pad indicates a percentage.
  • the term continuous is an indication at certain time intervals or at certain driving situations, for. B. at every engine start to understand.
  • Brake system for example, to uneven wear
  • Lead brake pads recognize with continuously working measuring systems.
  • Continuous measuring systems are known in the prior art as integrated systems in vehicle brakes of drive vehicles. For trailers or semi-trailers As a rule, discretely operating measuring systems are used, which can also be used as
  • Retrofit solutions are available. Such a retrofit solution is e.g. in the
  • a measuring system for determining wear of a
  • Brake lining of a friction brake has a sensor device for detecting a position of a brake lining carrier relative to another component of the
  • Friction brake on It is characterized in that the sensor device is designed to distinguishably detect at least three and preferably a plurality of different positions of the brake lining carrier.
  • the measuring system is no longer able to detect only one end point of wear, but to differentiate between several wear states.
  • Brake pad carrier related to the other components of the friction brake detected.
  • the wear on the brake pads can be tracked continuously and an exchange can be planned in advance, which minimizes downtimes and workshop times.
  • the continuous position value can be recorded and processed analog or digital with a suitable resolution.
  • the further component mentioned, relative to which the position of the brake pad carrier is detected is e.g. a caliper.
  • the position value for the brake pad carrier is then a measure of the cumulative wear of both
  • the sensor device has a linearly displaceable sensing element, the displacement of which is detected and which bears against the brake lining carrier.
  • the feeler element is preferably spring-loaded in order to bear against the brake lining carrier with a pressing force.
  • the sensor device can thus sense the position of the brake pad carrier that changes as a result of wear of the brake pads.
  • the feeler element can be straight or single or multiple angled or curved in order to extend from the position of the sensor device to the brake pad carrier.
  • a free end of the push-button element can also be connected to the brake pad carrier in a tensile manner, e.g. through appropriately positive contours.
  • the feeler element can also include a pull rope that is tensioned under spring force.
  • the sensor device itself is fastened to the further component of the friction brake via a holding bracket.
  • a holding bracket By using the retaining bracket, an attachment option in the area of the sensor device that is already present can be selected, for example an existing threaded hole or the like.
  • the holding bracket allows a corresponding flexibility for positioning the sensor device and for using existing fastening options.
  • Sensor device on a sensor for detecting a position of the linearly displaceable element, which is coupled to the probe element or is formed by the probe element.
  • the sensor can work potentiometrically, capacitively, inductively, optically or via ultrasound.
  • the sensor device designed to detect a position of the brake caliper relative to a brake carrier.
  • the sensor device preferably has a further sensing element, the displacement of which is detected and which bears against the brake carrier.
  • the further sensing element detects the position of the brake caliper relative to the Brake carrier and thus the "floating movement" of the brake caliper. This movement is accordingly a measure of the wear of the outer brake pad.
  • Brake pads are determined.
  • a radio transmitter is provided, for example in the sensor device, in order to wirelessly output detected values and / or information calculated from them.
  • Sensor device preferably has a battery, possibly a rechargeable battery, for energy supply.
  • the sensor device becomes self-sufficient with the battery
  • Fig. 1 a part of a friction brake with a measuring system in a first
  • FIG. 1 b shows the arrangement from FIG. 1 a in an isometric view; 2a shows a part of a friction brake with a measuring system in a second
  • Embodiment in a supervision shows the arrangement from FIG. 2a in an isometric view; 3a shows a part of a friction brake with a measuring system in a third
  • FIG. 3b shows the arrangement from FIG. 3a in an isometric view
  • Fig. 4 shows a part of a friction brake with a measuring system in a fourth
  • 5a shows a part of a friction brake with a measuring system in a fifth
  • 5b shows a schematic drawing of the measuring system according to FIG. 5a; and 6 shows a schematic drawing of a sensor device of a measuring system for determining wear of a brake lining
  • FIG. 1 shows a part of a friction brake of a commercial vehicle, for example a trailer, in a top view.
  • the brake shown is a disc brake, the basic principle shown in this application also being transferable to a drum brake.
  • the brake has a brake caliper 1, which is designed as a floating brake caliper, which holds two brake pads 2, which are mounted on brake pad carriers 3.
  • the brake pad carriers 3 are held in position within the brake caliper 1 with the aid of folded springs 4.
  • the brake pads 2 the one shown on the left in FIG. 1 a is fixedly mounted in the brake caliper 1 and is arranged on the outer side of the vehicle. It is also referred to below as the outer brake pad 2.
  • the brake lining 2 shown on the right, which is arranged on the inside of the vehicle, is accordingly also referred to below as the inner brake lining 2.
  • An application device 5 acts on it, by means of which it can be moved towards the outer brake pad 2.
  • the brake disk 6, which is connected to the wheel or a wheel axle and onto which the brake pads 2 are pressed by the application device 5, is arranged between the brake pads 2.
  • the brake shown is supplemented by a retrofittable measuring system for detecting wear of the brake pads 2.
  • This measuring system includes one
  • Fastening element in the present case a screw, to a suitable location on the
  • Brake caliper 1 is mounted.
  • an attachment option in the area of the sensor device 10 that is already present can be selected, for example an existing threaded hole or the like.
  • the holding bracket 11 allows a corresponding flexibility for positioning the sensor device 10 and for using existing fastening options.
  • a sensor element 14 is arranged on the sensor device 10, the free end of which is on a rear side, ie the side opposite the brake lining 2, of the
  • the sensing element 14 is connected to a sliding element which can be displaced linearly in the longitudinal direction of the sensor device 10 and which is subjected to spring force to the front, i.e. extends in the direction of the brake disc 6 from the housing of the sensor device 10. Furthermore, a sensor is arranged in the sensor device 10 which detects the
  • the sensor can be designed in various ways and for example
  • Detection of brightness gradients on the sliding element can be used. Furthermore, a magnetic position detection via an induction measurement and / or a measurement of a magnetic field of a moving permanent magnet, e.g. B. via a Hall sensor, conceivable. Another suitable functional principle that uses a force sensor is described in connection with FIGS. 3a, b.
  • the sensor device 10 is preferably supplied with the necessary operating current via an autonomous energy supply, for example an inserted battery.
  • the wear measure is also preferably output wirelessly via a
  • FIGS. 1a and 1b is a second in the same way as in FIGS. 1a and 1b
  • Embodiment of a measuring system for determining a degree of wear shown which is used retrofitted on the same brake as in Fig. 1 a, b.
  • the structure of the brake and also the basic principle of the measuring system reference is made to the first embodiment.
  • the feeler element 14 which in turn is coupled to a linearly displaceable element and a sensor in the sensor device 10 and which detects the position of the brake pad carrier 3 of the inner brake pad 2 relative to the sensor device 10, there is a further feeler element 15 with its free end probes the brake carrier on which the brake caliper 1 is mounted floating.
  • the further sensing element 15 is connected to a further linear slide in the sensor device 10, the position of which is detected by a further sensor.
  • the arrangement shown enables detection of the cumulative wear dimension of both brake linings 2 with the aid of the pushbutton element 14.
  • the further pushbutton element 15 detects the movement of the brake caliper 1 with respect to the brake carrier. This movement is a measure of the wear of the outer brake pad 2. The individual wear of each of the brake pads 2 can thus be determined with the aid of the two sensor information recorded.
  • Embodiments shown a third embodiment. Regarding the basic structure of the brake, reference is made to the embodiment of the first embodiment.
  • a sensor device 10 with a particularly short design in the direction of the linear movement of the probe element 14 is used.
  • the sensor element 10 can be approximately in the center of the
  • Brake pad 2 may be mounted so that the probing on the inner brake pad 2 takes place essentially centrally of the transverse axis. In this way, tilting and / or misalignment effects on the measured distance from the inner brake pad 2 can be minimized.
  • the sensing element 14 can be straight and not angled, as shown in those previously
  • Embodiments In this way, easier management of the
  • Sliding element can be implemented in the sensor device 10, since the tilting element 14 does not exert any tilting moments on this sliding element.
  • the feeler element 14 can also represent the linearly displaceable element in the sensor device in this sense.
  • the particularly short design of the sensor device 10 shown is possible, for example, by using a force measuring sensor to detect the position of the sensing element 14.
  • the force sensor is inside the housing
  • the feeler element 14 is pressed out of the housing of the sensor device 10 by means of a compression spring and is therefore on the back of the
  • the position of the feeler element 14 can be inferred from the measured force.
  • a contactless measurement of the position of the probe element 14 within the sensor device 10 is also conceivable, for example optically or also via ultrasound sensors.
  • a compression spring can be provided in order to press the feeler element 14 against the brake pad carrier.
  • provision can also be made to connect the sensing element 14 to the brake pad carrier 3, for example
  • FIG. 4 shows a further exemplary embodiment of a brake with a measuring system in a plan view.
  • the position of the brake pad carrier 3 is not touched directly by the feeler element 14, but rather via a fleece kinematics.
  • a two-sided lever 16 with a free end with the brake pad carrier 3 and with its other free end with the
  • the lever 16 is rotatably mounted in a fleece bearing 17 between the two connection points.
  • the axial change in position, which the brake pad plate 3 passes through due to the wear of the brake pads 2, can be reduced to a smaller amount by the lever 16
  • Transfer path range of the probe element 14 This tends to result in a large linear movement towards the range of movement of conventional linear sensors, for example, linear potentiometers or Hall sensors that can be used as sensors.
  • conventional linear sensors for example, linear potentiometers or Hall sensors that can be used as sensors.
  • lever kinematics described are additionally stabilized and fixed by additional guide elements, which are not shown in FIG. 4.
  • FIG. 5a shows, in the same way as FIG. 4a, a further exemplary embodiment of a brake with a measuring system for measuring wear.
  • a brake with a measuring system for measuring wear Regarding the basic structure of the brake, reference is made to the above description.
  • sensor device 10 Shown sensor device 10, the sensing element 14 or further sensing element 15 has pressed against the element to be sensed, the brake pad carrier 3.
  • 5a shows a sensor device 10 with a probe element 14, which is on the
  • Brake pad carrier 3 is attached and on which a train is exerted by the sensor device 10.
  • a possible embodiment of such a sensor device 10 with a push-button element 14 operating in tension is shown in FIG. 5b in a schematic schematic diagram.
  • the feeler element 14 has a pull cable 18 which is guided into the sensor device 10.
  • a cable drum 19 is arranged in the sensor device 10, onto which the traction cable 18 is rolled up and which acts on the traction cable 18 by spring force.
  • a spiral spring can be inserted in the cable drum 19.
  • the cable drum 19 converts a linear movement along the direction of the pulling cable 18 into a rotary movement, which is detected by a corresponding sensor, for example a rotary potentiometer.
  • a corresponding sensor for example a rotary potentiometer.
  • a guide through a telescopic spring can be used as a guide element.
  • the telescopic spring surrounding the pull rope 18 protects the wire rope inside and is able to move in and out with the movement of the feeler element 14.
  • a rubber bellows or a similar elastic element can also be provided to protect the pull cable 18.
  • FIG. 6 shows an example of the internal structure of a sensor device 10 in one
  • the sensor device 10 shown can be used, for example, in one of the exemplary embodiments of a measuring system in FIGS. 1 a to 4 become.
  • the sensor device 10 is designed with a straight sensing element 14, as is used in the exemplary embodiment in FIGS. 3a and 3b.
  • the sensor device 10 according to FIG. 6 can also have an angled one
  • Probe 14 may be provided. In the embodiment according to FIG. 6 this is possible
  • Probe element 14 in a sliding element over (or represents the sliding element), which is guided linearly displaceably in a linear guide 20 inside the sensor device 10. It is biased by means of a compression spring 21, so that the
  • a sensor 22 which detects the linear position of the sliding element or the feeler element 14. This can be a linear potentiometer, for example.
  • Information or signals from sensor 22 are evaluated by an evaluation unit 23. This converts the information from the sensor into an indication of the position of the sensing element 14. The evaluation unit 23 transfers the determined
  • Power lines are on the vehicle.

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

Abstract

Système de mesure pouvant être équipé ultérieurement pour la détermination d'une usure d'une garniture de frein (2) d'un frein à friction, comprenant un dispositif de capteur (10) pour la détection d'une position d'un support de garniture de frein (3) par rapport à un autre composant du frein à friction. Le dispositif de capteur (10) est conçu pour détecter comme distinctes au moins trois différentes positions du support de garniture de frein (3).
PCT/EP2019/072811 2018-09-18 2019-08-27 Système de mesure pouvant être équipé ultérieurement pour la détermination d'une usure d'une garniture de frein d'un frein à friction WO2020057911A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018122882.1A DE102018122882B4 (de) 2018-09-18 2018-09-18 Nachrüstbares Messsystem zur Ermitteln eines Verschleißes eines Bremsbelags einer Reibungsbremse
DE102018122882.1 2018-09-18

Publications (1)

Publication Number Publication Date
WO2020057911A1 true WO2020057911A1 (fr) 2020-03-26

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PCT/EP2019/072811 WO2020057911A1 (fr) 2018-09-18 2019-08-27 Système de mesure pouvant être équipé ultérieurement pour la détermination d'une usure d'une garniture de frein d'un frein à friction

Country Status (2)

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DE (1) DE102018122882B4 (fr)
WO (1) WO2020057911A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112049882A (zh) * 2020-10-23 2020-12-08 坤泰车辆系统（常州）有限公司 盘式制动器的固定式制动钳的摩擦片磨损报警策略

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11788594B2 (en) 2021-04-30 2023-10-17 Webb Wheel Products, Inc. Systems and methods for monitoring a wear state of a disc brake

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658936A (en) * 1985-07-25 1987-04-21 Goodyear Aerospace Corporation Brake temperature and wear indicator
DE4339901A1 (de) * 1992-11-24 1994-06-01 Lucas Ind Plc Verschleißmeßeinrichtung für Bremsbacken
US6237723B1 (en) * 1999-09-02 2001-05-29 Tony W. Salsman Quick check brake indicator
US20060090968A1 (en) * 2004-11-01 2006-05-04 Meritor Heavy Vehicle Braking Systems (Uk) Ltd. Brake assembly with brake pad position and wear sensor
US20110254679A1 (en) * 2010-03-15 2011-10-20 Jamie Bishop Todd Vehicle Brake Monitoring System and Method
DE102008026104B4 (de) 2008-05-30 2012-02-09 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Einrichtung zur Verschleißerkennung eines Bremsbelages einer Scheibenbremse sowie Bremsbelag für eine Scheibenbremse
DE102012017961A1 (de) * 2012-09-12 2014-03-13 Bpw Bergische Achsen Kg Vorrichtung zur Belagdickenbestimmung von Bremsbelägen

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
DE10216871A1 (de) 2002-04-17 2003-10-30 Wabco Gmbh & Co Ohg Verfahren zur Bremsbelagverschleiss-Sensierung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658936A (en) * 1985-07-25 1987-04-21 Goodyear Aerospace Corporation Brake temperature and wear indicator
DE4339901A1 (de) * 1992-11-24 1994-06-01 Lucas Ind Plc Verschleißmeßeinrichtung für Bremsbacken
US6237723B1 (en) * 1999-09-02 2001-05-29 Tony W. Salsman Quick check brake indicator
US20060090968A1 (en) * 2004-11-01 2006-05-04 Meritor Heavy Vehicle Braking Systems (Uk) Ltd. Brake assembly with brake pad position and wear sensor
DE102008026104B4 (de) 2008-05-30 2012-02-09 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Einrichtung zur Verschleißerkennung eines Bremsbelages einer Scheibenbremse sowie Bremsbelag für eine Scheibenbremse
US20110254679A1 (en) * 2010-03-15 2011-10-20 Jamie Bishop Todd Vehicle Brake Monitoring System and Method
DE102012017961A1 (de) * 2012-09-12 2014-03-13 Bpw Bergische Achsen Kg Vorrichtung zur Belagdickenbestimmung von Bremsbelägen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112049882A (zh) * 2020-10-23 2020-12-08 坤泰车辆系统（常州）有限公司 盘式制动器的固定式制动钳的摩擦片磨损报警策略
CN112049882B (zh) * 2020-10-23 2021-10-01 坤泰车辆系统（常州）有限公司 盘式制动器的固定式制动钳的摩擦片磨损报警策略

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DE102018122882B4 (de) 2024-02-01
DE102018122882A1 (de) 2020-03-19

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