DE1177424B - Inner shoe brake - Google Patents

Inner shoe brake

Info

Publication number
DE1177424B
DE1177424B DEH31663A DEH0031663A DE1177424B DE 1177424 B DE1177424 B DE 1177424B DE H31663 A DEH31663 A DE H31663A DE H0031663 A DEH0031663 A DE H0031663A DE 1177424 B DE1177424 B DE 1177424B
Authority
DE
Germany
Prior art keywords
brake
friction
wedge
brake drum
drum
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
DEH31663A
Other languages
German (de)
Inventor
John Kirk Harrison
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.)
JOHN KIRK HARRISON
Original Assignee
JOHN KIRK HARRISON
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 JOHN KIRK HARRISON filed Critical JOHN KIRK HARRISON
Publication of DE1177424B publication Critical patent/DE1177424B/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/46Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action
    • F16D51/60Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action with wedging action of a brake-shoe, e.g. the shoe entering as a wedge between the brake-drum and a stationary part

Landscapes

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

Description

Innenbackenbremse Die Erfindung bezieht sich auf eine Innenbackenbremse mit zwei einander gegenüberliegenden, auseinanderspreizbaren Bremshebeln, an denen keilförmige Reibbacken schwenkbar gelagert sind. Der Erfindung liegt die Aufgabe zugrunde, derartigen bekannten Bremsen eine selbstverstärkende Wirkung zu verleihen.Inner shoe brake The invention relates to an inner shoe brake with two opposing, spreadable brake levers on which wedge-shaped friction jaws are pivotably mounted. The invention has the task based on giving such known brakes a self-energizing effect.

Gelöst wird die gestellte Aufgabe dadurch, daß das der jeweiligen Umlaufrichtung der Bremstrommel entgegengerichtete Ende jeder Reibbacke zwischen zwei gleichachsig am Bremshebel angelenkten Laschen schwenkbar bei estigt ist, wobei in an sich bekannter We=se die Keilfläche jeder Reibbacke mittels einer Zugfeder in Anlage an je einem festen Anschlag des Bremshebels gehalten ist.The problem is solved by the fact that the respective Direction of rotation of the brake drum opposite end of each friction shoe between two brackets articulated on the same axis on the brake lever can be pivoted at estigt, wherein the wedge surface of each friction jaw by means of a tension spring in a manner known per se is held in contact with a fixed stop on the brake lever.

Die keilförmigen Reibbacken werden bei Reibungsschluß mit der Bremstrommel von dieser mitgenommen, wobei die Reibbacken zwischen festen Anschläg--n des Bremshebels und der Trommelbremsfläche eingeklemmt werden, so daß der Anpreßdruck zwischen den Reibbacken und der Reibfläche verstärkt wird. Die bewegte Reibfläche kann dabei eine geradlinige oder auch rotierende Bewegung ausführen, wie dies z. B. bei Bremstrommeln von Kraftfahrzeugen der Fall ist.The wedge-shaped friction shoes are frictionally engaged with the brake drum taken along by this, the friction shoes between fixed stops on the brake lever and the drum braking surface are clamped so that the contact pressure between the Friction shoes and the friction surface is reinforced. The moving friction surface can perform a straight or rotating movement, as z. B. with brake drums of motor vehicles is the case.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigt F i g. 1 einen Aufriß der Bremse bei entfernter Bremstrommel, F i g. 2 eine Draufsicht auf die Bremse gemäß F i g. 1 und F i g. 3 die zugehörige Bremstrommel.An exemplary embodiment of the invention is shown in the drawing. It shows F i g. 1 is an elevation of the brake with the brake drum removed, FIG. 2 a plan view of the brake according to FIG. 1 and F i g. 3 the associated brake drum.

Der Bremsträger oder das Bremsschild ist mit 1 und die Bremstrommel mit 2 bezeichnet. Die Drehrichtung der Bremstrommel z. B. bei vorwärts gerichteter Bewegung des Kraftfahrzeugs ist in F i g. 1 durch einen Pfeil angedeutet.The brake carrier or the brake plate is marked with 1 and the brake drum denoted by 2. The direction of rotation of the brake drum z. B. when facing forward Movement of the motor vehicle is shown in FIG. 1 indicated by an arrow.

Im Inneren der Bremstrommel befinden sich mehrere keilförmige Reibbacken 3, deren verjüngte Enden in die abzubremsende Drehrichtung der Bremstrommel weisen, während die verstärkten Enden an den Laschen 4 schwenkbar befestigt sind. Die Laschen 4 wiederum sind an den Bremshebeln 5 angelenkt. Die Laschen 4 sind durch Zugfedern 7 mit den festen Anschlägen 6 verbunden, so daß die Keilfläche jeder Reibbacke 3 an je einem Anschlag 6 des Bremshebels gehalten ist.There are several wedge-shaped friction shoes inside the brake drum 3, the tapered ends of which point in the direction of rotation of the brake drum to be braked, while the reinforced ends are pivotally attached to the tabs 4. The tabs 4 in turn are hinged to the brake levers 5. The tabs 4 are by tension springs 7 connected to the fixed stops 6 so that the wedge surface of each friction jaw 3 is held at a stop 6 of the brake lever.

Die Bremshebel 5 sind an dem Bremsschild 1 mittels des Gelenks $ befestigt, während die gegenüberliegenden Enden durch eine bekannte Vorrichtung gegen die Wirkung einer Rückstellfeder 9 spreizbar sind. Die Betätigungsvorrichtung kann z. B. aus einem hydraulischen Druckzylinder 10 oder aus einer mechanischen, durch ein Zugseil mit Führungshülle 11 betätigten Hebelübersetzung bestehen.The brake levers 5 are attached to the brake shield 1 by means of the joint $, while the opposite ends are counteracted by a known device a return spring 9 are expandable. The actuator can, for. B. off a hydraulic pressure cylinder 10 or a mechanical one, by means of a pull rope exist with guide sleeve 11 actuated leverage.

Bei gelüfteter Bremse liegen die Reibflächen 12 der keilförmigen Reibbacken 3 nahe der Innenfläche der Bremstrommel, sind jedoch durch das Lüftspiel von dieser getrennt. Bei Betätigung der Bremse werden die Bremshebels gespreizt, und die Reibflächen 12 treten mit der Bremstrommel in Reibungsschluß. Hierauf bewirkt die Reibkraft zwischen den Reibflächen 12 und der Bremstrommel, daß die Reibbacken 3 noch stärker zwischen die Anschläge 6 und die Innenfläche der Bremstrommel eingeklemmt werden, womit eine Selbstverstärkung der Reibkraft (Servowirkung) eintritt.When the brake is released, the friction surfaces 12 of the wedge-shaped friction shoes are located 3 close to the inner surface of the brake drum, but are due to the clearance of this separated. When the brake is actuated, the brake levers are spread apart and the friction surfaces 12 come into frictional engagement with the brake drum. The frictional force acts on this between the friction surfaces 12 and the brake drum that the friction shoes 3 are even stronger be wedged between the stops 6 and the inner surface of the brake drum, with which a self-reinforcement of the frictional force (servo effect) occurs.

Um diese .Servowirkung auch bei umgekehrter Drehrichtung der Bremstrommel zu erzielen, sind neben den Reibbacken 3 noch Reibbacken 13 vorgesehen, die spiegelbildlich zu den Reibbacken 3 angeordnet sind und die in dieser Drehrichtung die gleiche Wirkung ergeben wie die Reibbacken 3 für die in F i g. 1 angedeutete Drehrichtung der Bremstrommel.To this .Servo effect even with reverse direction of rotation of the brake drum To achieve, in addition to the friction jaws 3, friction jaws 13 are also provided, which are mirror images are arranged to the friction jaws 3 and which have the same effect in this direction of rotation result as the friction jaws 3 for the in F i g. 1 indicated direction of rotation of the brake drum.

Claims (1)

Patentanspruch: Innenbackenbremse mit zwei einander gegenüberliegenden, auseinanderspreizbaren Bremshebeln, an denen keilförmige Reibbacken schwenkbar gelagert sind, dadurch gekennzeichnet, daß das der jeweiligen Umlaufrichtung der Bremstrommel entgegengerichtete verstärkte Ende jeder Reibbacke (3, 13) zwischen zwei gleichachsig am Bremshebel (S) angelenkten Laschen (4) schwenkbar befestigt ist, wobei in an sich bekannter Weise die Keilfläche jeder Reibbacke mittels einer Zugfeder (7) in Anlage an je einem festen Anschlag (6) des Bremshebels gehalten ist. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 304 511, 521- 091, 830 163; französische Patentschriften Nr. 627 826, 901868, 1 029 022; USA.-Patentschrift Nr. 1 192 523.Patent claim: Inner shoe brake with two opposing, spreadable brake levers on which wedge-shaped friction shoes are pivotably mounted, characterized in that the reinforced end of each friction shoe (3, 13), which is opposite to the respective direction of rotation of the brake drum, is between two brackets (3, 13) hinged coaxially to the brake lever (S). 4) is pivotally attached, the wedge surface of each friction shoe being held in a known manner by means of a tension spring (7) in contact with a fixed stop (6) of the brake lever. Considered publications: German Patent Nos. 304 511, 521-091, 830 163; French Patent Nos. 627 826, 901868, 1029 022; U.S. Patent No. 1,192,523.
DEH31663A 1956-11-20 1957-11-14 Inner shoe brake Pending DE1177424B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU1177424X 1956-11-20

Publications (1)

Publication Number Publication Date
DE1177424B true DE1177424B (en) 1964-09-03

Family

ID=3837074

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH31663A Pending DE1177424B (en) 1956-11-20 1957-11-14 Inner shoe brake

Country Status (1)

Country Link
DE (1) DE1177424B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE304511C (en) *
US1192523A (en) * 1915-08-04 1916-07-25 William S Hutchinson Drum-brake.
FR627826A (en) * 1926-01-29 1927-10-13 Concentrically applied brake
DE521091C (en) * 1929-02-08 1931-03-18 Fritz Florig Dr Ing Inner shoe brake, especially for motor vehicles with two groups of brake shoes
FR901868A (en) * 1944-02-10 1945-08-08 Super self-locking drum brake with linkage equal to distribution of the initial force
DE830163C (en) * 1949-01-12 1952-01-31 Adam Pleines Internal shoe brake, especially for motor vehicles
FR1029022A (en) * 1950-11-30 1953-05-29 Improvements to brakes, clutches and the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE304511C (en) *
US1192523A (en) * 1915-08-04 1916-07-25 William S Hutchinson Drum-brake.
FR627826A (en) * 1926-01-29 1927-10-13 Concentrically applied brake
DE521091C (en) * 1929-02-08 1931-03-18 Fritz Florig Dr Ing Inner shoe brake, especially for motor vehicles with two groups of brake shoes
FR901868A (en) * 1944-02-10 1945-08-08 Super self-locking drum brake with linkage equal to distribution of the initial force
DE830163C (en) * 1949-01-12 1952-01-31 Adam Pleines Internal shoe brake, especially for motor vehicles
FR1029022A (en) * 1950-11-30 1953-05-29 Improvements to brakes, clutches and the like

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