WO2019170408A1 - Détecteur d'usure de garniture et garniture de frein - Google Patents

Détecteur d'usure de garniture et garniture de frein Download PDF

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Publication number
WO2019170408A1
WO2019170408A1 PCT/EP2019/054115 EP2019054115W WO2019170408A1 WO 2019170408 A1 WO2019170408 A1 WO 2019170408A1 EP 2019054115 W EP2019054115 W EP 2019054115W WO 2019170408 A1 WO2019170408 A1 WO 2019170408A1
Authority
WO
WIPO (PCT)
Prior art keywords
wear sensor
lining
pad
sensor
brake
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.)
Ceased
Application number
PCT/EP2019/054115
Other languages
German (de)
English (en)
Inventor
Stephan Kotteder
Josef Schropp
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 Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=65657432&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2019170408(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of WO2019170408A1 publication Critical patent/WO2019170408A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16D66/022—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
    • F16D66/024—Sensors mounted on braking members adapted to contact the brake disc or drum, e.g. wire loops severed on contact
    • 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

Definitions

  • the invention relates to a lining wear sensor according to the preamble of
  • the generic DE 10 2008 026 104 A1 describes a device for
  • Pad wear sensor For monitoring the friction lining thickness, in particular for determining a permissible wear limit of the friction lining of the brake lining, contact conductors are known, for example in the form of cables which, when the wear limit is reached, ie when the friction lining has worn away accordingly, comes into contact with the friction lining during braking standing brake disc
  • Such a contact conductor is set in a generic device, which clamped as a holder in a friction lining bearing pad carrier plate of
  • Brake pads engages, wherein the plant leg through which, for example, the said cable is guided, rests in a recess of the friction lining and protrudes into it so far that the inserted cable to a predetermined thickness of the
  • Friction lining is positioned. When falling below the predetermined thickness of
  • a non-fusible aromatic polyimide has been used as the attachment body of the pad wear sensor.
  • This polyimide has a
  • the invention has for its object to provide an alternative attachment body for the pad wear sensor, which corresponds to the material requirements in the braking area and this even to improve compared to the material used to date even.
  • An inventive pad wear sensor for placement on or in a
  • Brake pad of a disc brake has a mounting body and a
  • the contact conductor element is connected to the attachment body. This may be an immediate connection, e.g. through an implementation of the
  • connection may also be a fixed connection or a movable connection, so that the contact conductor element is arranged, for example, movable relative to the fastening body in a passage of the fastening body.
  • the attachment body has in particular an abrasion side, which is at least partially exposed to abrasion by a rotating brake body, such as a brake disc, from a certain service life of the brake pad at normal arrangement of the lining wear sensor on or in the brake pad.
  • the abrasion side of the mounting body is inventively at least partially formed of a cement-based material.
  • cement-based material makes it possible to improve
  • the abrasion side region of the lining wear sensor can be used as
  • Sensor head be formed.
  • the contact conductor may be guided, wherein the sensor head consists of the cementitious material.
  • the attachment body is advantageously resiliently arranged on the brake pad, so that the elasticity of the material of a friction lining of the brake pad is compensated by the resilient mounting.
  • the lining wear sensor can advantageously have a spring element for resilient mounting of the mounting body on the brake pad.
  • This direction of the suspension should preferably in Zuspannraum, ie in the direction of movement of the brake pad to the brake partner, e.g. to the brake disc, out or away.
  • the cementitious material may be formed as a fiber-reinforced cementitious material.
  • the cementitious material may be formed as a UHPC material, more preferably as a HRUHPC material, in particular as a fiber reinforced HRUHPC material.
  • the proportion of fibers in the cementitious material may advantageously be at least 1% by weight, preferably from 2 to 12% by weight.
  • the fibers of the fiber-reinforced cementitious material may be formed as non-conductive fibers, in particular as glass fibers and / or carbon fibers.
  • the proportion of cement in the cementitious material may advantageously be at least 10% by weight, preferably at least 25% by weight
  • the attachment body can be produced in a strand molding process.
  • the attachment body can be attached to a lining carrier plate of a brake pad
  • Embodiment may be advantageous per se and used in other embodiments.
  • FIG. 1 is a detail view of an embodiment of a lining wear sensor without contact conductor and its arrangement on a lining carrier plate.
  • Fig. 2 is a sectional view of the lining wear sensor of Fig. 1 and its
  • FIG. 6 is a perspective view of a first side of the mounting body of the
  • FIG. 7 is a perspective view of a second side of the mounting body of the
  • Fig. 8 is a schematic representation of the Befest onlyskorpuses of Fig. 5-7 of
  • Fig. 9 is a perspective view of a plate spring for use in a
  • Fig. 10 brake pad with the pad wear sensor of Fig. 5-8;
  • FIG. 1 detail view of Fig. 10;
  • FIG. 12 rear view of the brake pad of Fig. 10;
  • Fig. 13 is a perspective view of the pad wear sensor of Figs. 5-12.
  • FIG. 14 perspective view of a third embodiment of a lining wear sensor according to the invention.
  • Fig. 1-8 is a lining wear sensor 1 and a device for
  • the brake pad 2 has a lining carrier plate 3 with a plate plane E and an attached non-illustrated friction lining, which in the case of braking against a brake disc is pressed.
  • the lining wear sensor 1 has a contact conductor 20 and a
  • the fastening body 10 on.
  • the fastening body 10 is u.a. in FIGS. 1 and 2,
  • the pad wear sensor 1 comprises the T-shaped mounting body 10. This has a sensor head 9 with two stop legs 8 with stop surfaces 13 and a sensor foot 1 1, which is arranged in a recess 5 on the plate plane E.
  • the stop surfaces 13 are in the assembled state of
  • the fastening body shown in Fig. 1 shows only a preferred variant of a mounting body. There are also many other variants feasible.
  • the attachment body may be formed without stop leg or only with a stop leg.
  • At least one passage is provided in the sensor head 9, through which the contact conductor 20 can be guided.
  • Bushings 12 are provided, wherein the contact conductor is guided as a conductor loop through both passages 12.
  • the contact conductor 20 may be formed as a cable. Upon contact of the brake disc with the contact conductor 20, there is a detection and generating a
  • Inserted contact conductor 20 to the pad carrier plate 3 is slightly more than the minimum allowable thickness of the friction lining. If the contact conductor is damaged, a display is made to replace the friction lining, so that the truck soon has to go to the workshop to replace the brake pads.
  • the attachment body 10 is clamped in the recess 5 of
  • Pad carrier plate 3 wherein the pad carrier 3 in the recess 5 a pin. 7 having.
  • the sensor foot 1 1 has an opening 6, in particular a bore, through which the pin 7 can be pushed through.
  • the pin 7 may have a groove 14. Furthermore, the pin may have a circumferential projection 18, which between the
  • Pad carrier plate 3 and the mounting body can be arranged. Specifically, the pin 7 is set in a blind hole 19 edge in the lining carrier plate 3. The mounting body 10 can be secured against axial displacement on the pin 7 by a snap ring 15 which engages in the groove 14.
  • the diameter of the opening 6 in the sensor foot 1 1 is dimensioned larger than the diameter of the pin 7, so that a game or a tolerance range between the pin 7 and the mounting body 10 is provided.
  • This tolerance range is bridged by a tolerance sleeve 16, also called tolerance ring, which as
  • This spring element is shown in FIGS. 3 and 4.
  • tolerance sleeve 16 is preferably a slotted sheet metal sleeve, in the beads, preferably wave crests 17, are embossed.
  • a material spring steel strip can be used as a material spring steel strip.
  • a corresponding spring band steel can be used for applications at temperatures of up to 220 ° C or more. He has up to this temperature constant spring properties.
  • the tolerance sleeve sits in the gap between the opening 6 and the pin 7.
  • For the tight fit provide wave peaks 17, which are distributed over the entire circumference of the tolerance sleeve 16 and how many small compression springs act.
  • the wave crests 17 are elastically deformed, whereby a frictional connection between the sensor foot 1 1 and the pin 7 is formed.
  • the attachment body 10 of the lining wear sensor 1 can advantageously be manufactured by an extrusion molding process.
  • the strand molding process is a forming process with which prismatic profiles can be manufactured.
  • An example of a strand forming process is extrusion molding. Extrusion is counted according to DIN 8582 for pressure forming. In this case, a heated to forming temperature compact (block) is pressed with a punch through a die. In the process, the block is replaced by a recipient
  • the outer shape of the pressed strand is determined by the die. Through differently shaped mandrels cavities can be generated.
  • Extrusion is used to produce continuous material, which is separated in the desired length. The continuous material is then cut to length
  • a material composition can be used, which is known to those skilled in the art as Knetbeton.
  • the pad wear sensor 21 has a mounting body 30 also a sensor head 29 and a sensor foot 31.
  • the sensor head 29 is dimensioned wider than the sensor foot 31, so that the
  • Sensor head 29 at the transition between the sensor head 29 and the sensor foot 31 has a circumferential stop surface 33. This is as detailed in FIG. 13
  • the plate spring 37 has, as clearly visible in FIG. 9, starting from a ring region 41, radially inwardly extending spring arms 42. These can be brought into engagement with the toothed ring-like abutment surface 33, so that an anti-rotation of the plate spring 37 is present.
  • the lining wear sensor 21 also has, analogously to FIG. 1, a contact conductor 40. Furthermore, at least one passage is provided in the sensor head 29, through which the contact conductor can be guided. In the in Fig. 5-8 shown
  • Embodiment the sensor head 29 on two bushings 32, wherein the contact conductor is guided as a conductor loop through both passages 32.
  • the sensor foot 31 defines a longitudinal axis 100, wherein the sensor foot 31 has a blind hole 36 parallel to the longitudinal axis 100.
  • part of the lining wear sensor 21 is a plate spring 37, which is arranged in the assembled state between the abutment surfaces 33 of the sensor head 29 and the lining carrier plate 23 and which is detachable from the mounting body 30. This is shown in detail in FIG. 9.
  • the lining carrier plate has an opening 39 perpendicular to the plate plane E, through which the lining wear sensor, in particular the sensor foot 31 of the
  • the sensor foot 31 may have a groove 34 in a terminal area, as in FIG.
  • the mounting body 30 is thus resiliently mounted in the opening 39 of the lining carrier plate 23.
  • the friction lining 24 is shown on the lining carrier plate 23 in FIG. 10 and also enlarged in FIG. 11.
  • At least the sensor head 9, 29, but preferably the entire attachment body 10 or 30 according to the invention of a cementitious material, in particular of a concrete material is formed.
  • This may preferably be a fiber-reinforced cementitious material, as this significantly increases the tensile loads on the attachment body 10 or 30.
  • the sensor foot 1 1, 31 need not necessarily be made of the cementitious material, but it may, for example, in the embodiment of FIGS. 5-8 is a metal sleeve, which is encapsulated in the cementitious material.
  • the aforementioned fiber reinforcement is selected in particular from non-conductive fibers.
  • the non-conductive fibers in contrast to metal fibers, may preferably be glass fibers and / or polymer fibers.
  • Aramid fibers are preferably formed as polymer fibers.
  • the fiber content of the cement-based material may advantageously be between 2 to 25% by volume.
  • the material of the pad sensor is adapted in regions to the material of the friction pad.
  • a reduction of the material costs of the polymer-based lining wear sensor used hitherto is also achieved.
  • the use of the material allows a sufficient temperature stability against a Flitzeitz caused due to a braking operation.
  • the fiber reinforcement also allows an amplification of the mechanical
  • Both the tolerance sleeve 16 and the plate spring 37 serve as spring elements for mechanical compression when applying the brake.
  • the friction material of the Friction pads typically a bit behind. In contrast, the sensor head is off
  • FIG. 14 shows a further variant of a fastening body 51 of a
  • Pad wear sensor 50 This attachment body 51 can also be produced in an extrusion process.
  • the fastening body 51 is dumbbell-shaped and comprises two terminal sensor heads 55, each with a
  • Feedthrough 56 for performing a contact conductor 57 may be provided in the attachment body.
  • the lining wear sensor 50 has two spring elements 52, which can be used in a lining carrier plate 53 of the brake lining. These are as
  • Pad wear sensor to the elasticity of the friction lining material, so that the lining wear sensor does not prematurely trigger after a certain abrasion of the friction lining.
  • the surface pressure by the friction lining material is intended to ensure reliable braking both during the locking process of a parking brake and during a normal braking operation.
  • the material composition of the sensor head 9, 29 is selected so that it is subject to a higher wear rate than the friction material, so that no material bulges form in the region of the sensor head 9, 29 with increasing abrasion.
  • the sensor head 9, 29 be formed as a UHPC material and particularly preferably a HRUHPC material.
  • the latter material has a particularly favorable pressure and stability.
  • the proportion of fibers in the cementitious material should be at least 1% by weight, preferably 2 to 12% by weight.
  • the proportion of cement in the cementitious material may advantageously be at least 10% by weight, preferably at least 25% by weight.
  • the cementitious material may include at least one additive
  • lime is particularly preferably formed as a water scavenger.
  • various additives especially in the form of oxides or carbides, can be added to the cementitious material to adjust the hardness.

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

Abstract

L'invention concerne un détecteur d'usure de garniture (1, 21) à monter sur au dans une garniture de frein (2, 22) d'un frein à disque, ledit détecteur d'usure de garniture comprenant un corps de fixation (10, 30) et un conducteur de contact (20), ledit conducteur de contact (20) étant relié au corps de fixation (10, 30), ledit corps de fixation (10, 30) se composant au moins par endroits d'un matériau à base de ciment. L'invention concerne également une garniture de frein (2).
PCT/EP2019/054115 2018-03-06 2019-02-19 Détecteur d'usure de garniture et garniture de frein Ceased WO2019170408A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018105057.7A DE102018105057B4 (de) 2018-03-06 2018-03-06 Belagverschleißsensor und Bremsbelag
DE102018105057.7 2018-03-06

Publications (1)

Publication Number Publication Date
WO2019170408A1 true WO2019170408A1 (fr) 2019-09-12

Family

ID=65657432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/054115 Ceased WO2019170408A1 (fr) 2018-03-06 2019-02-19 Détecteur d'usure de garniture et garniture de frein

Country Status (2)

Country Link
DE (1) DE102018105057B4 (fr)
WO (1) WO2019170408A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021106219A1 (de) 2021-03-15 2022-09-15 Zf Cv Systems Europe Bv Vorrichtung mit einem Sensor und einem Sprengring zum Anzeigen eines Verschleißes eines Bremsbelags einer Scheibenbremse, sowie diesbezüglicher Sprengring und Nutzfahrzeug
EP4515115A1 (fr) * 2022-04-28 2025-03-05 Stellantis Europe S.p.A. Patin de freinage pour véhicules et procédé d'assemblage de fabrication d'un tel patin de freinage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553642A (en) * 1968-07-19 1971-01-05 Gen Motors Corp Electrical brake lining wear indicator
GB2172945B (en) * 1985-03-25 1989-06-21 Morganite Elect Carbon Friction-linings incorporating wear sensors
EP0992702A2 (fr) * 1998-10-09 2000-04-12 Meritor Heavy Vehicle Systems, LLC Patin de frein avec capteur d'usure de garniture de frein résistif
US6450300B1 (en) * 1998-10-21 2002-09-17 Meritor Heavy Vehicle Systems, Llc Packaging a temperature sensing brake lining wear indicator in a brake shoe assembly
DE102008026104A1 (de) 2008-05-30 2009-12-03 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Einrichtung zur Verschleißerkennung eines Bremsbelages einer Scheibenbremse sowie Bremsbelag für eine Scheibenbremse
US20130306410A1 (en) * 2010-10-20 2013-11-21 Wabco Radbremsen Gmbh Brake lining wear indicator, disc brake having such an indicator and brake shoes for such a disc brake

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE624354A (fr) 1961-11-02 1900-01-01
CN100545420C (zh) 2007-01-26 2009-09-30 同济大学 隧道衬砌管片及其制备方法
DE102013020750A1 (de) 2013-12-10 2015-06-11 Lucas Automotive Gmbh Fixierteil zur Befestigung eines Kennzeichnungsteils an einem Bremssattel einer Scheibenbremse und Scheibenbremse mit einem derartigen Fixierteil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3553642A (en) * 1968-07-19 1971-01-05 Gen Motors Corp Electrical brake lining wear indicator
GB2172945B (en) * 1985-03-25 1989-06-21 Morganite Elect Carbon Friction-linings incorporating wear sensors
EP0992702A2 (fr) * 1998-10-09 2000-04-12 Meritor Heavy Vehicle Systems, LLC Patin de frein avec capteur d'usure de garniture de frein résistif
US6450300B1 (en) * 1998-10-21 2002-09-17 Meritor Heavy Vehicle Systems, Llc Packaging a temperature sensing brake lining wear indicator in a brake shoe assembly
DE102008026104A1 (de) 2008-05-30 2009-12-03 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Einrichtung zur Verschleißerkennung eines Bremsbelages einer Scheibenbremse sowie Bremsbelag für eine Scheibenbremse
US20130306410A1 (en) * 2010-10-20 2013-11-21 Wabco Radbremsen Gmbh Brake lining wear indicator, disc brake having such an indicator and brake shoes for such a disc brake

Also Published As

Publication number Publication date
DE102018105057B4 (de) 2023-01-12
DE102018105057A1 (de) 2019-09-12

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