DE10121429A1 - Device for monitoring motor vehicle disc brake friction lining wear state has electrical lead to resistance path unaffected in outer region by brake disc protruding beyond its effective surface - Google Patents
Device for monitoring motor vehicle disc brake friction lining wear state has electrical lead to resistance path unaffected in outer region by brake disc protruding beyond its effective surfaceInfo
- Publication number
- DE10121429A1 DE10121429A1 DE10121429A DE10121429A DE10121429A1 DE 10121429 A1 DE10121429 A1 DE 10121429A1 DE 10121429 A DE10121429 A DE 10121429A DE 10121429 A DE10121429 A DE 10121429A DE 10121429 A1 DE10121429 A1 DE 10121429A1
- Authority
- DE
- Germany
- Prior art keywords
- friction lining
- resistance
- brake
- wear
- motor vehicle
- 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.)
- Withdrawn
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine Vorrichtung mit den Merkmalen des Oberbegriffs von Patentanspruch 1.The invention relates to a device with the features of Preamble of claim 1.
Ein derartige Vorrichtung ist in der DE 23 56 242 beschrieben und aus den Unterlagen des deutschen Gebrauchsmusters 7 214 038 bekannt. Die bekannte Vorrichtung dient insbesondere dazu, verschiedene Abnutzungsgrade des Bremsbelages messbar zu machen. Es ist beispielsweise auf verschieden langen Fingern des Brechelements jeweils eine Widerstandsbahn angebracht, die durch das Abbrechen des Fingers ein- bzw. ausgeschaltet wird.Such a device is described in DE 23 56 242 and from the Documents of German utility model 7 214 038 known. The well-known The device is used in particular to different degrees of wear of the Make brake pads measurable. For example, it is on different lengths Fingers of the crushing element each attached a resistance path through the finger breaking is switched on or off.
Die Erfindung betrifft die Verbesserung der bekannten Vorrichtung insbesondere im Hinblick auf die Messgenauigkeit der tatsächlichen Belagdicke.The invention relates to the improvement of the known device in particular With regard to the measurement accuracy of the actual covering thickness.
Die Lösung dieser Aufgabe besteht aus den Merkmalen des Patentanspruchs 1.The solution to this problem consists of the features of claim 1.
Das Maß der Abnutzung des Bremsbelags ist durch die Höhenlage der jeweiligen Widerstandsbahn bestimmt. Bremsscheiben weisen im Laufe der Abnutzung durch Bremsvorgänge einen sogenannten Bremsscheibenrand auf. Dieser entsteht dadurch, dass ein Bremsbelag geometrisch betrachtet aus materialtechnischen und akustischen Gründen immer etwas unterhalb und somit innerhalb der Bremsscheibe liegt.The degree of wear of the brake pad is due to the altitude of each Resistance path determined. Brake discs show through in the course of wear Braking processes a so-called brake disc edge. This arises in that a brake pad is considered geometrically from material technology and acoustic reasons always a bit below and therefore within the brake disc lies.
Dieser Bremsscheibenrand kann bei ungünstiger Dimension und einer unpassenden Konstruktion des Reibbelagdicken-Sensors einen vorzeitigen Verschleiß vortäuschen. Um diesen unerwünschten Effekt und die damit verbundenen vorzeitigen Austausch des Bremsbelags zu vermeiden, weichen die elektrischen Zuleitungen der Widerstandsbahnen dem Bremsscheibenrand aus. This brake disc edge can be an unfavorable dimension and one inappropriate design of the friction lining thickness sensor a premature Pretend wear. To this undesirable effect and with it to avoid the associated premature replacement of the brake pad, the electrical leads of the resistance tracks from the brake disc edge.
Dadurch werden die im Bremsbelag verlaufenden Widerstandsbahnen durch die Scheibenbremse in ihrer Leitfähigkeit beeinflusst, d. h. bei der entsprechenden Dicke des Bremsbelags unterbrochen bzw. geschlossen.As a result, the resistance tracks running in the brake pad are covered by the Disc brake affected in its conductivity, d. H. at the appropriate Brake pad thickness interrupted or closed.
Anhand eines Ausführungsbeispiels, aus dem weitere Einzelheiten und Vorteile der Erfindung hervorgehen, sollen diese näher beschrieben werden.Using an exemplary embodiment from which further details and advantages of Invention emerge, they will be described in more detail.
In der einzigen Figur ist ein erfindungsgemäß aufgebauter Brechkörper B dargestellt, der ein Blechstanzteil (Lead-frame) ist und aus parallel zueinander angeordneten Brechelementen 1, 2, . . ., n (hier n = 12) besteht. Die Brechelemente sind an ihrer Basis Ba und an ihrem anderen Ende mechanisch und elektrisch miteinander verbunden. Jedes Brechelement besteht aus einer Widerstandsbahn L1, L2, . . ., Ln und besitzt an seinem Ansatzpunkt eine Brechstelle B1, B2, . . ., Bn, die als Schwächung des Querschnitts ausgebildet ist, z. B. als Bohrung, Kerbe oder Kombination aus Bohrung und Kerbe. Bei einer Beanspruchung eines Brechelements durch Teüe der Bremse, die infolge der Bremsbelagabnutzung eine Bewegung ausführen, wird das Brechelement an der Brechstelle abgebrochen, wodurch jeweils eine der Widerstandsbahnen L1 bis Ln unterbrochen wird.In the single figure there is a crushing body B constructed according to the invention shown, which is a sheet metal stamped part (lead frame) and parallel to each other arranged crushing elements 1, 2,. , ., n (here n = 12). The crushing elements are Ba at their base and mechanical and electrical at their other end connected with each other. Each crushing element consists of a resistance track L1, L2,. , ., Ln and has a breaking point B1, B2,. , ., Bn, the is designed as a weakening of the cross section, for. B. as a hole, notch or Combination of hole and notch. When a Breaking element by Teüe the brake, which due to the brake pad wear a Execute movement, the breaking element is broken off at the breaking point, whereby one of the resistance tracks L1 to Ln is interrupted.
Der Brechkörper B weist ferner zwei Anschlüsse A1 und A2 auf, über die der Gesamtwiderstand des Brechkörpers meßbar ist. Dieser ändert sich abhängig von der Anzahl der noch vorhandenen Widerstandsbahnen.The crushing body B also has two connections A1 and A2, through which the Total resistance of the crushing body is measurable. This changes depending on the number of remaining resistance tracks.
Ein zwischen den Anschlüssen A1 und A2 angeschlossenes Messinstrument zeigt bei völlig intaktem Brechkörper B den Widerstand der Leiterbahnen L1, L2, . . ., Ln an, also praktisch den Widerstand 0. Nach dem Abbrechen der Widerstandsbahn L1, misst das Messinstrument den Widerstand der Widerstandsbahnen L2, . . ., Ln usw. Der Gesamtwiderstand steigt stufenweise an.A measuring instrument connected between the connections A1 and A2 shows when the crushing body B is completely intact, the resistance of the conductor tracks L1, L2,. , ., Ln on, practically the resistance 0. After breaking the resistance track L1, the measuring instrument measures the resistance of the resistance tracks L2,. , ., Ln etc. The total resistance increases gradually.
Sind alle Widerstandsbahn L1, . . ., Ln-1 abgebrochen, wird nur noch der Widerstand der im Bremsbelag bezüglich der Reibfläche R der Bremsscheibe S am tiefsten angeordneten Widerstandsbahn Ln angezeigt. Die Abstufung zwischen den verschiedenen Widerstandsbahnen kann noch weiter verfeinert bzw. verbessert werden, indem die elektrischen Widerstände der Widerstandsbahnen mit unterschiedlichen Werten versehen sind. Damit lassen sich die einzelnen Verschleißstufen besser unterscheiden als bei gleichen Widerstandswerten der Widerstandsbahnen. Durch die unterschiedlichen Widerstandswerte zwischen den Stufen lässt sich zudem eine Identifizierung der Stufenkennung mittels Widerstandswert pro Stufe ermöglichen.Are all resistance paths L1,. , ., Ln-1 canceled, only the resistance is left the lowest in the brake pad with respect to the friction surface R of the brake disc S. arranged resistance path Ln displayed. The gradation between the Different resistance tracks can be further refined or improved by using the electrical resistances of the resistance tracks different values. With this, the individual Differentiate wear levels better than with the same resistance values Resistance tracks. Due to the different resistance values between the Levels can also be used to identify the level identifier Allow resistance value per level.
Erfindungswesentlich weisen die Widerstandsbahnen L1, . . ., Ln im Bereich des Bremsscheibenrandes R einen Diagonalversatz d gegenüber ihrem übrigen Verlauf auf. Der Versatz d entspricht der maximal möglichen Dickendifferenz zwischen der wirksamen Fläche F der Bremsscheibe S und dem Bremsscheibenrand R. Dadurch kann der Bremsscheibenrand R die Widerstandsbahnen L1, . . ., Ln nicht unterbrechen. Dies geschieht vielmehr durch die wirksame Fläche der Bremsscheibe selbst. Der Bremsbelagdicken-Sensor liefert eine Aussage über die tatsächliche Stärke des Bremsbelags.Essential to the invention, the resistance tracks L1,. , ., Ln in the area of Brake disc edge R a diagonal offset d compared to the rest of its course on. The offset d corresponds to the maximum possible difference in thickness between the effective area F of the brake disc S and the brake disc edge R. Thereby can the brake disc edge R the resistance tracks L1,. , ., Ln not interrupt. Rather, this is done through the effective area of the Brake disc itself. The brake pad thickness sensor provides information about the actual thickness of the brake pad.
Damit lässt sich mit Hilfe des erfindungsgemäß gestalteten Brechkörpers eine eindeutige Bestimmung des Abnutzungsgrads eines Reibbelags erzielen.This can be done with the help of the crushing body designed according to the invention achieve a clear determination of the degree of wear of a friction lining.
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10121429A DE10121429A1 (en) | 2000-05-06 | 2001-05-02 | Device for monitoring motor vehicle disc brake friction lining wear state has electrical lead to resistance path unaffected in outer region by brake disc protruding beyond its effective surface |
DE20121177U DE20121177U1 (en) | 2000-05-06 | 2001-05-02 | Device for monitoring the state of wear of a friction lining for motor vehicle disc brakes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10022065 | 2000-05-06 | ||
DE10121429A DE10121429A1 (en) | 2000-05-06 | 2001-05-02 | Device for monitoring motor vehicle disc brake friction lining wear state has electrical lead to resistance path unaffected in outer region by brake disc protruding beyond its effective surface |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10121429A1 true DE10121429A1 (en) | 2002-01-03 |
Family
ID=7640983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10121429A Withdrawn DE10121429A1 (en) | 2000-05-06 | 2001-05-02 | Device for monitoring motor vehicle disc brake friction lining wear state has electrical lead to resistance path unaffected in outer region by brake disc protruding beyond its effective surface |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10121429A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006004730A1 (en) * | 2006-02-02 | 2007-08-09 | Bayerische Motoren Werke Ag | Method for monitoring the strength of at least one friction partner of a vehicle friction brake and vehicle friction brake with a device for carrying out the method |
US7694555B2 (en) | 2007-03-27 | 2010-04-13 | Gm Global Technology Operations, Inc. | Brake pad prognosis system |
CN114135611A (en) * | 2021-12-01 | 2022-03-04 | 中国矿业大学 | Self-driven intelligent monitoring integrated friction liner for mining friction type hoister |
CN114962506A (en) * | 2021-02-24 | 2022-08-30 | 广州汽车集团股份有限公司 | Measuring equipment for sliding resistance of friction plate |
-
2001
- 2001-05-02 DE DE10121429A patent/DE10121429A1/en not_active Withdrawn
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006004730A1 (en) * | 2006-02-02 | 2007-08-09 | Bayerische Motoren Werke Ag | Method for monitoring the strength of at least one friction partner of a vehicle friction brake and vehicle friction brake with a device for carrying out the method |
DE102006004730B4 (en) * | 2006-02-02 | 2010-07-08 | Bayerische Motoren Werke Aktiengesellschaft | Method for monitoring the strength of at least one friction partner of a vehicle friction brake and vehicle friction brake with a device for carrying out the method |
US7694555B2 (en) | 2007-03-27 | 2010-04-13 | Gm Global Technology Operations, Inc. | Brake pad prognosis system |
CN114962506A (en) * | 2021-02-24 | 2022-08-30 | 广州汽车集团股份有限公司 | Measuring equipment for sliding resistance of friction plate |
CN114962506B (en) * | 2021-02-24 | 2024-02-23 | 广州汽车集团股份有限公司 | Measuring equipment for sliding resistance of friction plate |
CN114135611A (en) * | 2021-12-01 | 2022-03-04 | 中国矿业大学 | Self-driven intelligent monitoring integrated friction liner for mining friction type hoister |
CN114135611B (en) * | 2021-12-01 | 2024-03-08 | 中国矿业大学 | Mining friction type elevator self-driven intelligent monitoring integrated friction lining |
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Legal Events
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OR8 | Request for search as to paragraph 43 lit. 1 sentence 1 patent law | ||
8105 | Search report available | ||
8139 | Disposal/non-payment of the annual fee |