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WO2013011490A1 - Capteur d'usure acoustique - Google Patents

Capteur d'usure acoustique Download PDF

Info

Publication number
WO2013011490A1
WO2013011490A1 PCT/IB2012/053709 IB2012053709W WO2013011490A1 WO 2013011490 A1 WO2013011490 A1 WO 2013011490A1 IB 2012053709 W IB2012053709 W IB 2012053709W WO 2013011490 A1 WO2013011490 A1 WO 2013011490A1
Authority
WO
WIPO (PCT)
Prior art keywords
leg
jaw member
wear sensor
jaw
brake pad
Prior art date
Application number
PCT/IB2012/053709
Other languages
English (en)
Inventor
Willem Schalk Scholtz
Original Assignee
Compound Technology (Proprietary) Limited
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 Compound Technology (Proprietary) Limited filed Critical Compound Technology (Proprietary) Limited
Priority to EP12767103.0A priority Critical patent/EP2734745A1/fr
Priority to ZA2013/00529A priority patent/ZA201300529B/en
Publication of WO2013011490A1 publication Critical patent/WO2013011490A1/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

Definitions

  • THIS invention relates to an acoustic wear sensor, and more particularly but not exclusively, to an acoustic wear sensor forming part of a brake pad of a disc brake arrangement.
  • a braking system is a critical part of any wheel-driven vehicle, and is used for slowing or stopping the rotation of a wheel that is in motion.
  • One type of brake arrangement is a disc brake arrangement, which comprises a disc that is connected to a wheel, and brake pads that are mounted on a brake caliper, and which can selectively be forced into abutment with the disc so as to slow the wheel down by way of friction.
  • a brake pad typically comprises a backing plate made from a suitable metal onto which friction material or compound is deposited. In use the friction material is urged against the metal disc, thus resulting in gradual wear of friction material. Brake pads must therefore be replaced regularly, and some brake pads are accordingly provided with a mechanism that will alert the drive to the need for replacement.
  • an acoustic wear sensor which is typically in the form of a thin tab of metal that engages the discs when the brake pad material has worn away to a predetermined level, and in so doing emitting a mechanically induced audible squeal, but without causing damage to the disc.
  • acoustic wear sensor typically in the form of a thin tab of metal that engages the discs when the brake pad material has worn away to a predetermined level, and in so doing emitting a mechanically induced audible squeal, but without causing damage to the disc.
  • an acoustic wear sensor including:
  • an elongate metal body having a first leg and a second leg, with the body being shaped in order for the first leg and the second leg to overlie one another;
  • the first leg including a jaw formation suitable for engaging a backing plate of a brake pad, the jaw formation comprising a first jaw member and a second jaw member;
  • the first jaw member is formed by an end of the first leg being bent transversely relative to the first leg; and the second jaw member is formed by a section of the first leg being partially separated from the first leg and bent into a cantilevered configuration relative to the first leg, in order for the second jaw member and the first jaw member to at least partially oppose one another so as to define the jaw formation.
  • first leg There is provided for sides of the first leg to terminate in shoulder formations so as to increase a stiffness of the first leg.
  • the first jaw member may include tapered barb formations extending sideways from the jaw member for engaging friction material of the brake pad.
  • the second jaw member may include a barb formation extending toward the first jaw member for in use engaging a receiving aperture provided in a base plate of the brake pad.
  • a proximal zone of the body that connects the first leg and the second leg may be formed into a scroll in order to provide a degree of resilience between the second leg and the first leg.
  • At least one groove to be provided in a surface of the second leg member.
  • a brake pad including:
  • the backing plate may include a receiving aperture for receiving a barb formation extending from a second jaw member of the acoustic wear sensor.
  • the friction compound may include a recessed section for receiving and end of a first jaw member of the acoustic wear sensor.
  • the recessed section and the first jaw member are complementary configured and dimensioned in order for barb formations extending from the first jaw member to bite into the friction material defining a wall of the recessed section.
  • Figure 1 is a rear perspective view of an acoustic wear sensor in accordance with the invention.
  • Figure 2 is a front perspective view of the acoustic wear sensor of
  • Figure 3 is a bottom perspective view of a brake pad incorporating the wear sensor of Figures 1 and 2;
  • Figure 4 is a top perspective view of the brake pad of Figure 3.
  • a non-limiting example of an acoustic wear sensor in accordance with the invention is generally indicated by reference numeral 10.
  • the acoustic wear sensor 10 is manufactured from an integral section of elongate sheet metal, and comprises a first leg 30, a second leg 50 and an intermediate proximal zone 40.
  • the first leg 30 includes an end zone 31 that terminates in a first jaw formation 32.
  • the first jaw formation 32 is formed by bending a distal end of the first leg 30 substantially perpendicularly away from the first leg 30, and furthermore includes two oppositely directed barb formations 33 extending sideways therefrom.
  • a second jaw formation 34 is also integrally formed with the first leg 30, and is formed by forming a U-shaped slot in the first leg 30, followed by bending the section of material substantially perpendicularly away from the first leg 30, so that the first jaw formation 32 and the second jaw formation 34 are substantially parallel.
  • a barb formation 35 is also formed in the second jaw formation, and protrudes from the second jaw formation 34 on the side facing the first jaw formation 32.
  • Opposing edges of the first leg 30 terminate in shoulder formations 36, which increase the area moment of inertia of the first leg 30. This allows for the use of a material of reduced gauge, whilst also ensuring that the first leg 30 remains structurally sound despite the second jaw formation 34 being formed from part of the body of the first leg 30.
  • the shoulders 36 also define a housing in which the second leg 50 is located.
  • the second leg 50 overlies the first leg 30, is formed by bending the elongate body at a proximal zone 40 thereof.
  • the proximal zone is bent with a relatively large radius so as to form a scroll that increases the resilience of the body.
  • the second leg 50 terminates in an end 51 that protrudes beyond the first jaw formation 32 of the first leg 30.
  • one or more grooves 52 may be provided in the second leg 50 in order to manipulate the harmonic characteristics of the wear sensor.
  • the wear sensor 10 is used with a brake pad 60 that has been specifically configured for receiving the wear sensor 10. More particularly, a backing plate 61 of the brake pad 60 includes a receiving recess (not shown) for receiving the barb formation 35 extending from the second jaw formation 34, and the friction material 62 bonded to the backing plate 61 includes a recessed zone 63 for receiving the first jaw formation 32.
  • the first jaw formation 32 and the recessed zone 63 are configured and dimensioned in order for the barb formations 33 extending from the sides of first jaw formation 32 to bite into the friction material, thus further enhancing the engagement of the wear sensor 10 to the brake pad 60.

Landscapes

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

Abstract

L'invention concerne un capteur d'usure acoustique (10) pour une plaquette de frein d'un agencement de freins à disque, le capteur comprenant un corps métallique allongé comportant une première patte (30) et une seconde patte (50), le corps présentant une forme telle que la première patte et la seconde patte soient superposées. La première patte comprend une partie formant une mâchoire conçue pour pouvoir entrer en prise avec le support d'une plaquette de frein, la partie formant une mâchoire comprenant un premier élément de mâchoire (32) et un second élément de mâchoire (34). Le premier élément de mâchoire est constitué d'une extrémité de la première patte courbée transversalement par rapport à la première patte et le second élément de mâchoire est constitué d'une section de la première patte partiellement séparée de la première patte et courbée de façon à réaliser une configuration en porte-à-faux par rapport à la première patte. Le second élément de mâchoire et le premier élément de mâchoire sont réalisés de manière à se trouver au moins en partie en face l'un de l'autre afin de définir la partie formant une mâchoire.
PCT/IB2012/053709 2011-07-21 2012-07-20 Capteur d'usure acoustique WO2013011490A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12767103.0A EP2734745A1 (fr) 2011-07-21 2012-07-20 Capteur d'usure acoustique
ZA2013/00529A ZA201300529B (en) 2011-07-21 2013-01-21 Acoustic wear sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2011/05385 2011-07-21
ZA201105385 2011-07-21

Publications (1)

Publication Number Publication Date
WO2013011490A1 true WO2013011490A1 (fr) 2013-01-24

Family

ID=46968323

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/053709 WO2013011490A1 (fr) 2011-07-21 2012-07-20 Capteur d'usure acoustique

Country Status (3)

Country Link
EP (1) EP2734745A1 (fr)
WO (1) WO2013011490A1 (fr)
ZA (1) ZA201300529B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8800372B1 (en) * 2012-04-26 2014-08-12 Michael A. Pangerl Noncontact measurement and wireless transmission system
DE102013013290A1 (de) 2013-08-08 2015-02-12 Lucas Automotive Gmbh Bremsbelaganordnung mit Verschleißanzeiger sowie Verschleißanzeiger hierfür
FR3030421A1 (fr) * 2014-12-23 2016-06-24 Renault Sa Detection automatique d'un niveau d'usure d'une plaquette de frein
WO2019063179A1 (fr) * 2017-09-27 2019-04-04 Robert Bosch Gmbh Détection d'usure de frein basée sur le son pour systèmes de freinage de véhicule
EP3097320B1 (fr) * 2014-01-20 2020-04-08 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Frein à disque pour véhicule utilitaire
US20230096318A1 (en) * 2021-09-27 2023-03-30 Goodrich Corporation Rotor clip apparatus and systems

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124105A (en) * 1977-06-27 1978-11-07 Akebono Brake Industry Company, Ltd. Audible alarm sounding type pad clip device for disc brake
GB2109065A (en) * 1981-10-27 1983-05-25 Toyota Motor Co Ltd Friction-pad wear-limit warning device for disc brakes
US5033590A (en) * 1989-03-20 1991-07-23 Tokico Ltd. Brake friction pad
EP0596761A1 (fr) * 1992-11-04 1994-05-11 Alliedsignal Materiaux De Friction Patin de frein à disque muni d'un témoin d'usure sonore

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124105A (en) * 1977-06-27 1978-11-07 Akebono Brake Industry Company, Ltd. Audible alarm sounding type pad clip device for disc brake
GB2109065A (en) * 1981-10-27 1983-05-25 Toyota Motor Co Ltd Friction-pad wear-limit warning device for disc brakes
US5033590A (en) * 1989-03-20 1991-07-23 Tokico Ltd. Brake friction pad
EP0596761A1 (fr) * 1992-11-04 1994-05-11 Alliedsignal Materiaux De Friction Patin de frein à disque muni d'un témoin d'usure sonore

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8800372B1 (en) * 2012-04-26 2014-08-12 Michael A. Pangerl Noncontact measurement and wireless transmission system
US10088003B2 (en) 2013-08-08 2018-10-02 Lucas Automotive Gmbh Brake pad arrangement with wear indicator and wear indicator therefor
WO2015018693A1 (fr) * 2013-08-08 2015-02-12 Lucas Automotive Gmbh Ensemble garniture de frein présentant un témoin d'usure ainsi que indicateur d'usure correspondant
CN105452703A (zh) * 2013-08-08 2016-03-30 卢卡斯汽车股份有限公司 带有磨损指示器的制动衬片装置和用于制动衬片装置的磨损指示器
DE102013013290A1 (de) 2013-08-08 2015-02-12 Lucas Automotive Gmbh Bremsbelaganordnung mit Verschleißanzeiger sowie Verschleißanzeiger hierfür
EP3097320B1 (fr) * 2014-01-20 2020-04-08 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Frein à disque pour véhicule utilitaire
FR3030421A1 (fr) * 2014-12-23 2016-06-24 Renault Sa Detection automatique d'un niveau d'usure d'une plaquette de frein
WO2016102793A1 (fr) * 2014-12-23 2016-06-30 Renault S.A.S Détection automatique d'un niveau d'usure d'une plaquette de frein
WO2019063179A1 (fr) * 2017-09-27 2019-04-04 Robert Bosch Gmbh Détection d'usure de frein basée sur le son pour systèmes de freinage de véhicule
US10539200B2 (en) 2017-09-27 2020-01-21 Robert Bosch Gmbh Sound-based brake wear detection for vehicle braking systems
CN111108030A (zh) * 2017-09-27 2020-05-05 罗伯特·博世有限公司 用于车辆制动系统的基于声音的制动磨损检测
CN111108030B (zh) * 2017-09-27 2022-08-23 罗伯特·博世有限公司 用于车辆制动系统的基于声音的制动磨损检测
US20230096318A1 (en) * 2021-09-27 2023-03-30 Goodrich Corporation Rotor clip apparatus and systems
US11913510B2 (en) * 2021-09-27 2024-02-27 Goodrich Corporation Rotor clip apparatus and systems

Also Published As

Publication number Publication date
EP2734745A1 (fr) 2014-05-28
ZA201300529B (en) 2014-03-26

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