DE2636891A1 - Bearing for shoe in internal drum brake - has bush at fixed pivot end made or noise suppressing material - Google Patents

Bearing for shoe in internal drum brake - has bush at fixed pivot end made or noise suppressing material

Info

Publication number
DE2636891A1
DE2636891A1 DE19762636891 DE2636891A DE2636891A1 DE 2636891 A1 DE2636891 A1 DE 2636891A1 DE 19762636891 DE19762636891 DE 19762636891 DE 2636891 A DE2636891 A DE 2636891A DE 2636891 A1 DE2636891 A1 DE 2636891A1
Authority
DE
Germany
Prior art keywords
bearing
shoe
brake
bush
drum 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.)
Pending
Application number
DE19762636891
Other languages
German (de)
Inventor
Georg Bruenn
Franz Michel
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.)
MAN AG
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg AG
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 MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Priority to DE19762636891 priority Critical patent/DE2636891A1/en
Publication of DE2636891A1 publication Critical patent/DE2636891A1/en
Pending 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
    • F16D65/09—Pivots or supporting members therefor
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/02—Mechanical properties
    • F16C2202/08—Resilience, elasticity, super-elasticity
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/06—Temperature
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/45—Brakes

Abstract

Internal shoe drum brake comprises a shoe having at one end a bearing bore for a pivot and having at the other end a bearing bore for a pressure roller. Each bore contains a bush intended to suppress brake noise esp. squeaking of the brake. To this end the bushes are made of an asbestos weave moulded in synthetic resin. The material has a modulus of elasticity of 350-700 kp/mm2, a specific pressure normal to the surface of 2400 kp/cm2, and can maintain these properties up to 150 deg.C. The material is similar to a friction material.

Description

Bremsbacke für eine Trommelbremse Brake shoe for a drum brake

Die Erfindung bezieht sich auf eine Bremsbacke für eine Trommelbremse mit einer Hauptlagerbohrung und einer Lagerbohrung für eine Druckrolle, die beide mit Lagerbüchsen versehen sind.The invention relates to a brake shoe for a drum brake with a main bearing bore and a bearing bore for a pressure roller, both are provided with bearing bushes.

Bei bisher bekannten Bremsbacken wird als Material für die Lagerbüchsen der Hauptlagerbohrung und der Lagerbohrung für die Druckrolle Buntmetall verwendet, um gute Gleiteigenschaften auf dem aus Stahl bestehenden Hauptlagerzapfen und der ebenfalls aus Stahl bestehenden Welle der Druckrolle zu erzielen. Es hat sich jedoch gezeigt, daß beim Einsatz von Buntmetallagerbüchsen je nach der konstruktiven Auslegung unter Umständen sehr starke Bremsgeräusche auftreten, die insbesondere bei größeren Trommeldurchmessern als sehr lästiges Quietschen wahrnehmbar sind.In previously known brake shoes, the material used for the bearing bushes the main bearing bore and the bearing bore for the pressure roller used non-ferrous metal, to have good sliding properties on the main bearing journal made of steel and the also made of steel shaft of the pressure roller to achieve. It has, however shown that when using non-ferrous metal bearing bushes depending on the structural design very strong braking noises may occur, especially with larger Drum diameters are perceptible as a very annoying squeak.

Aufgabe der Erfindung ist es, gattungsgemäße Bremsbacken so zu gestalten, daß Bremsgeräusche, insbesondere das typische Bremsquietschen vermieden wird.The object of the invention is to design generic brake shoes so that braking noises, in particular the typical brake squeal, is avoided.

Zur Lösung dieser Aufgabe wird gemäß der Erfindung vorgeschlagen, daß die Lagerbüchsen für die Hauptlagerbohrung und für die Lagerbohrung der Druckrolle aus einem reibmaterialähnlichen kunstharzvergossenen Asbestgewebe mit folgenden Materialeigenschaften bestehen: Elastizitätsmodul 350 - 700 kp/mm2 spezifische Flächenpressung normal zur Oberfläche 2 400 kp/cm2 Dauertemperaturbeständigkeit bis 150 OC.To solve this problem it is proposed according to the invention, that the bearing bushes for the main bearing bore and for the bearing bore of the pressure roller made of a synthetic resin cast asbestos fabric similar to friction material with the following Material properties consist of: modulus of elasticity 350 - 700 kp / mm2 specific surface pressure normal to the surface 2 400 kp / cm2 permanent temperature resistance up to 150 OC.

Durch die Elastizität solcher Lagerbüchsen wird die Schallbrücke, die zwischen dem Bremsbelag und dem Bremshalter normalerweise entsteht, unterbrochen und somit eine Verstärkung des an der Reibpaarung des Bremsbackens entstehenden Geräusches vermieden. Es hat sich auch gezeigt, daß Lagerbüchsen aus dem beschriebenen Material ausreichende Dauerhaftigkeit besitzen und den auftretenden Kräften standhalten.The elasticity of such bearing bushes makes the sound bridge, which normally arises between the brake pad and the brake holder, interrupted and thus a reinforcement of the friction pairing of the brake shoe Avoided noise. It has also been shown that bearing bushes from the described Material have sufficient durability and withstand the forces that occur.

In der beigefügten Zeichnung ist ein Ausführungsbeispiel eines erfindungsgemäßen Bremsbackens dargestellt.In the accompanying drawing is an embodiment of an inventive Brake shoe shown.

Der üblicherweise aus Leichtmetall hergestellte Bremsbacken 1 trägt an seinem Außenbogen in üblicher Weise den Bremsbelag 2.The brake shoe 1, usually made of light metal, carries the brake lining 2 on its outer curve in the usual manner.

In die Hauptlagerbohrung 3 ist eine aus reibmaterialähnlichem kunstharzvergossenen Asbestgewebe bestehende Lagerbüchse 4 eingesetzt. Eine Lagerbüchse aus gleichem Material befindet sich in der Lagerbohrung für die Druckrolle 5 am anderen Ende des Bremsbackens 1.In the main bearing bore 3 is a synthetic resin encapsulated from friction material-like Asbestos fabric existing bearing bush 4 used. A bearing bush from the same Material is located in the bearing bore for the pressure roller 5 at the other end of the brake shoe 1.

Claims (1)

Patentanspruch Bremsbacke für eine Trommelbremse mit einer Hauptlagerbohrung und einer Lagerbohrung für eine Druckrolle, die beide mit Lagerbüchsen versehen sind, dadurch gekennzeichnet, daß die Lagerbüchsen aus einem reibmaterialähnlichen, kunstharzvergossenem Asbestgewebe mit folgenden Materialeigenschaften bestehen: Elastizitätsmodul 350 - 700 kp/mm2 spezifische Flächenpressung normal zur Oberfläche 2 400 kp/cm2 Dauertemperaturbeständigkeit bis 150 °C. Patent claim brake shoe for a drum brake with a main bearing bore and a bearing bore for a pressure roller, both of which are provided with bearing bushes are, characterized in that the bearing bushes are made of a friction material similar, Resin-encapsulated asbestos fabric with the following material properties: Modulus of elasticity 350 - 700 kp / mm2 specific surface pressure normal to the surface 2 400 kp / cm2 permanent temperature resistance up to 150 ° C.
DE19762636891 1976-08-17 1976-08-17 Bearing for shoe in internal drum brake - has bush at fixed pivot end made or noise suppressing material Pending DE2636891A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762636891 DE2636891A1 (en) 1976-08-17 1976-08-17 Bearing for shoe in internal drum brake - has bush at fixed pivot end made or noise suppressing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762636891 DE2636891A1 (en) 1976-08-17 1976-08-17 Bearing for shoe in internal drum brake - has bush at fixed pivot end made or noise suppressing material

Publications (1)

Publication Number Publication Date
DE2636891A1 true DE2636891A1 (en) 1978-02-23

Family

ID=5985591

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762636891 Pending DE2636891A1 (en) 1976-08-17 1976-08-17 Bearing for shoe in internal drum brake - has bush at fixed pivot end made or noise suppressing material

Country Status (1)

Country Link
DE (1) DE2636891A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4407401A1 (en) * 1994-03-05 1995-09-14 Bpw Bergische Achsen Kg Drum brake for vehicles
CN100545479C (en) * 2006-09-27 2009-09-30 陈永波 On axis hole, be provided with the combination shoe piece of lining
CN105805187A (en) * 2016-05-17 2016-07-27 潘小东 Special braking device for vehicle hub brake

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4407401A1 (en) * 1994-03-05 1995-09-14 Bpw Bergische Achsen Kg Drum brake for vehicles
CN100545479C (en) * 2006-09-27 2009-09-30 陈永波 On axis hole, be provided with the combination shoe piece of lining
CN105805187A (en) * 2016-05-17 2016-07-27 潘小东 Special braking device for vehicle hub brake

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