DE3217698A1 - Servo brake with two brake shoes - Google Patents

Servo brake with two brake shoes

Info

Publication number
DE3217698A1
DE3217698A1 DE19823217698 DE3217698A DE3217698A1 DE 3217698 A1 DE3217698 A1 DE 3217698A1 DE 19823217698 DE19823217698 DE 19823217698 DE 3217698 A DE3217698 A DE 3217698A DE 3217698 A1 DE3217698 A1 DE 3217698A1
Authority
DE
Germany
Prior art keywords
brake
shoes
brake shoes
servo
rollers
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Withdrawn
Application number
DE19823217698
Other languages
German (de)
Inventor
Hans 8201 Gollenshausen Huber
Valentin Dipl.-Ing. 8201 Eggstätt Knott
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.)
Knott GmbH
Original Assignee
MASCHINENBAU KNOTT EGGSTAETT ING VALENTIN KNOTT
KNOTT EGGSTAETT ING VALENTIN K
Maschinenbau Knott Eggstaett Ing Valentin Knott 8201 Eggstaett
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 MASCHINENBAU KNOTT EGGSTAETT ING VALENTIN KNOTT, KNOTT EGGSTAETT ING VALENTIN K, Maschinenbau Knott Eggstaett Ing Valentin Knott 8201 Eggstaett filed Critical MASCHINENBAU KNOTT EGGSTAETT ING VALENTIN KNOTT
Priority to DE19823217698 priority Critical patent/DE3217698A1/en
Publication of DE3217698A1 publication Critical patent/DE3217698A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/20—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer
    • B60T7/203—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer with automatic brake release or reduction in case of reverse travel, e.g. by means of mechanisms mounted on the draw bar
    • B60T7/206—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer with automatic brake release or reduction in case of reverse travel, e.g. by means of mechanisms mounted on the draw bar by means of mechanisms mounted on trailer drum brakes
    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/46—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
    • F16D2125/28—Cams; Levers with cams
    • F16D2125/30—Cams; Levers with cams acting on two or more cam followers, e.g. S-cams

Landscapes

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

Abstract

In order to make it possible to manufacture a servo brake with two brake shoes for motor-vehicle trailers with overrunning brakes and automatic reverse economically from standard components of two-shoe brakes, symmetrical brake shoes and guiding members for the latter are used, the brake shoes being guided with rollers on symmetrical carriers. The carriers are each pivotably mounted on a bearing pin secured on a brake plate and are supported at the other end against a symmetrically double-sided expander cam rotatably mounted on the brake plate, and have two webs, between which the webs of the T-shaped brake shoes are arranged and, supported against rollers, are displaceable approximately peripherally to the centre of the brake plate. In the vicinity of the points of contact with the rollers, the web of the T-shaped brake shoes is provided with recesses and the outer peripheral length of the brake shoes is such that they can be displaced peripherally on the brake plate at a circumferential angle of 14-15 DEG until they come to rest against an anchor secured on the brake plate. <IMAGE>

Description

Die Erfindung betrifft eine Servo-Bremse nach dem Ober-The invention relates to a servo brake according to the upper

begriff des Hauptanspruches und hat die Aufgabe, eine solche Bremse kostengWnstig aus normalen Serienteilen der Bremsenfertigung herzustellen.understood the main claim and has the task of such a brake to manufacture inexpensively from normal series parts from brake production.

Zu diesem Zweck wird die Servo-Bremse nach dem Oberbegriff des Hauptanspruches gemäß den kennzeichnenden Merkmalen des Haupt- und der Unteransprüche ausgebildet.For this purpose, the servo brake according to the preamble of the main claim designed according to the characterizing features of the main and subclaims.

Durch Verwendung von Symmetrischen und gegeneinander austauschbaren Bremsbacken und deren Führungsorganen wird die Montage vereinfacht. Einzelteile von serienmäßigen Duo-Servo und Nocken-Simplex Bremsen können Verwendung finden. Damit sind die Herstellungskosten einer solchen Servo-Bremse mit Rückfahrt-Automatik niedrig, Ein Ausführungsbeispiel ist auf den Zeichnungen dargestellt.By using symmetrical and interchangeable Brake shoes and their guide elements, assembly is simplified. individual parts standard duo servo and cam simplex brakes can be used. This reduces the manufacturing costs of such a servo brake with an automatic reverse drive low, An embodiment is shown on the drawings.

Fig. 1 zeigt eine erfindungsgemäße Servo-Bremse in Seitenansicht.Fig. 1 shows a servo brake according to the invention in side view.

Fig. 2 zeigt dieselbe Bremse als Duo-Servo-Bremse ohne Rückfahrt-Automatik mit Nachstell-Vorrichtung.Fig. 2 shows the same brake as a duo-servo brake without automatic reverse travel with adjustment device.

Auf einem Bremsteller 1 mit darauf befestigtem Anker 2 sind zwei mit Reibbelag versehene Bremsbacken 3 mit 4 angeordnet und gegen eine nicht gezeichnete Brems-Trommel pressbar. An einem Ende sind die Bremsbacken 3 und 4 abstützbar gegen den Anker 2 und am anderen Ende miteinander durch einen Lenker 5 verbunden, der in Fig. 2 als Nachstellvorrichtung fUr die Bremsbacken 3 , 4 ausgebildet ist.On a brake plate 1 with an anchor 2 attached to it are two with Brake shoes 3 with friction lining provided with 4 arranged and against a Brake drum, not shown, can be pressed. At one end are the brake shoes 3 and 4 can be supported against the armature 2 and at the other end together by a handlebar 5 connected, which in FIG. 2 is designed as an adjusting device for the brake shoes 3, 4 is.

Auf dem Bremsteller 1 sind zwei Zapfen 6 und 7 befestigt, auf denen zur Führung der Bremsbacken 3 und 4 Träger 8 und 9 schwenkbar gelagert sind, die durch die Vorspannung einer Zugfeder 10 gegen einen symmetrisch doppelseitig ausgebildeten Spreiznocken 11 gezogen werden, der am Bremsteller 1 drehbar gelagert ist und durch Drehung die Träger 8 und 9 radial nach außen bewegt.On the brake plate 1, two pins 6 and 7 are attached, on which to guide the brake shoes 3 and 4 carriers 8 and 9 are pivotably mounted, the by the bias of a tension spring 10 against a symmetrically formed double-sided Expanding cam 11 are pulled, which is rotatably mounted on the brake plate 1 and through Rotation moves the carrier 8 and 9 radially outward.

Die Träger 8 und 9 haben zwei Stege, zwischen denen die T-förmig ausgebildeten Bremsbacken 3 und 4 angeordnet sind und abgestützt werden durch Rollen 12, die auf Lagerbolzen 13 zwischen den Stegen der Träger 8 und 9 drehbar sind. Durch vorgespannte Zugfedern 14 und 15 werden die Bremsbacken 3 und 4 gegen die Rollen 12 gezogen.The carriers 8 and 9 have two webs, between which the T-shaped Brake shoes 3 and 4 are arranged and are supported by rollers 12 which are on Bearing pins 13 are rotatable between the webs of the carrier 8 and 9. By prestressed Tension springs 14 and 15 pull the brake shoes 3 and 4 against the rollers 12.

Der Zentriwinkel der Verbindungslinien von den Rollendrehpunkten zum Mittelpunkt des Bremstellers 1 beträgt bei gelöster Bremse jeweils ca 900. Auf diese Weise wird die symmetrische Ausbildung und Verwendung von rechts gegen links austauschbaren Teilen ermöglicht.The central angle of the connecting lines from the roller pivot points to the The center of the brake plate 1 is approximately 900 when the brake is released Way, the symmetrical training and use of right for left is interchangeable Sharing enables.

Bei dem Ausführungsbeispiel nach Fig. 1 ist der Steg jeder Bremsbacke 3 und 4 in der Nähe des Anlagepunktes an einer Rolle 12 mit einer Vertiefung 16 versehen und die Bremsbacken 3 , 4 sind mindestens mit ihrem, den Reibbelag tragenden Teil in der Umfangslänge so bemessen, daß sie auf dem Bremsteller 1 mit einem Umfangswinkel von 140 - 150 gegen den Anker 2 peripher verschiebbar sind. Bei einer Drehung der nicht gezeichneten Bremstrommel entgegen der durch einen Pfeil gekennzeichneten Drehrichtung, also bei Rückwärtsfahrt, wird die durch den Spreiznocken 11 bewirkte Anpressung der Reibbeläge gegen die Bremstrommel soweit vermindert, daß bei einem begrenzten Spreizweg keine Bremswirkung möglich ist, sobald die Rollen 12 die Vertiefungen erreicht haben.In the embodiment of FIG. 1, the web is each brake shoe 3 and 4 in the vicinity of the contact point on a roller 12 with a recess 16 provided and the brake shoes 3, 4 are at least with their, the friction lining bearing Part in the circumferential length dimensioned so that it is on the brake plate 1 with a circumferential angle from 140 - 150 against the armature 2 are peripherally displaceable. When rotating the not signed Brake drum opposite to that indicated by an arrow The direction of rotation marked, i.e. when driving backwards, is determined by the expansion cam 11 the pressing of the friction linings against the brake drum is reduced to the extent that that with a limited spread no braking effect is possible as soon as the rollers 12 have reached the depressions.

(Rückfahrt-Automatik) Das Ausfuhrungsbeispiel nach Fig. 2 zeigt eine Duo-Servo-Bremse mit bis auf die Umfangslänge der Bremsbacken 3 , 4 , die Vertiefungen 16 und die Nachstellvorrichtung 5, gleichen Bauteilen.(Automatic return trip) The exemplary embodiment according to FIG. 2 shows a Duo servo brake with the indentations except for the circumferential length of the brake shoes 3, 4 16 and the adjusting device 5, the same components.

Claims (4)

Servo-3remse mit zwei Bremsbacken Patent-AnsprUche Servo-Bremse für mit Auflaufbremse ausgerüstete Anhänger von Kraftfahrzeugen und automatischer Ausschaltung der Bremswirkung bei Rückwärts fahrt des Zugfahrzeuges mit zwei innen gegen eine Bremstrommel pressbaren und Reibbelag tragenden Bremsbacken, die an einem Ende durch einen Lenker miteinander verbunden und am anderen gegen einen an einem Bremsteller befestigten Anker abstützbar sind, dadurch gekennzeichnet, daß jede Bremsbacke (3,4) auf einem Träger (8,9) mit Rollenführung führbar ist, welcher auf je einem am Bremsteller (1) befestigten Lagerbolzen (6,7) mit einem Ende schwenkbar und mit dem anderen Ende abgestützt ist gegen einen symmetrisch oppelseitig ausgebildeten am Bremsteller (1) drehbar gelagerten Spreiznocken (11).Servo brake with two brake shoes Patent claims Servo brake for Motor vehicle trailers equipped with overrun brake and automatic switch-off the braking effect when the towing vehicle drives backwards with two inside against one Brake drum pressable and friction lining bearing brake shoes, which through at one end one handlebar connected to one another and on the other against one on a brake plate attached anchor can be supported, characterized in that each brake shoe (3, 4) can be guided on a carrier (8, 9) with a roller guide, which on each one on the brake plate (1) fixed bearing pin (6,7) pivotable with one end and with the other The end is supported against a symmetrically opposite end on the brake plate (1) rotatably mounted expansion cam (11). 2. Servo-Bremse nach Anspruch 1, dadurch gekennzeichnet, daß die Träger (8,9) zwei Stege haben, zwischen denen Rollen(12)gelagert sind, wobei der Zentriwinkel der Verbindungslinien von den Rollendrehpunkten zum Mittelpunkt des Bremstellers (1) bei gelöster Bremse jeweils ca.2. Servo brake according to claim 1, characterized in that the carrier (8,9) have two webs, between which rollers (12) are mounted, the central angle the connecting lines from the roller pivot points to the center of the brake plate (1) with the brake released approx. 900 beträgt. 900 is. 3. Servo-Bremse nach Anspruch 2, dadurch gekennzeichnet, daß die T-förmig ausSebildeten Bremsbacken (3,4) mit ihren Stegen zwischen den Stegen der Träger (8,9) angeordnet und gegen die Rollen (12) abgestützt etwa peripher zum Mittelpunkt des Bremstellers (1) verschiebbar sind.3. Servo brake according to claim 2, characterized in that the T-shaped formed brake shoes (3, 4) with their webs between the webs of the carrier (8,9) arranged and supported against the rollers (12) approximately peripherally to the center of the brake plate (1) are displaceable. 4. Servo-Bremse nach einen der vorhergehenden Ansprüche, dadurch gekènnzeichnet, daß der Steg der T-förmigen Bremsbacken (3,4) in der Nähe der Anlagepunkte an den Rollen (12) mit Vertiefungen (16) versehen ist und daß die Bremsbacken (3,4) in ihrer äußeren Umfangslänge so bemessen sind, daß sie auf dem Bremsteller (1) in einem Umfangswinkel von 140 - 150 gegen den Anker (2) peripher verschiebb r sind.4. Servo brake according to one of the preceding claims, characterized thereby, that the web of the T-shaped brake shoes (3,4) in the vicinity of the contact points on the Rollers (12) is provided with recesses (16) and that the brake shoes (3,4) in their outer circumferential length are dimensioned so that they are on the brake plate (1) in A circumferential angle of 140-150 against the armature (2) are peripherally displaceable.
DE19823217698 1982-05-11 1982-05-11 Servo brake with two brake shoes Withdrawn DE3217698A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823217698 DE3217698A1 (en) 1982-05-11 1982-05-11 Servo brake with two brake shoes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823217698 DE3217698A1 (en) 1982-05-11 1982-05-11 Servo brake with two brake shoes

Publications (1)

Publication Number Publication Date
DE3217698A1 true DE3217698A1 (en) 1983-11-17

Family

ID=6163286

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823217698 Withdrawn DE3217698A1 (en) 1982-05-11 1982-05-11 Servo brake with two brake shoes

Country Status (1)

Country Link
DE (1) DE3217698A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3040572A1 (en) * 2014-12-08 2016-07-06 BPW FAHRZEUGTECHNIK GmbH & CO. KG Drum brake for a vehicle and brake pad pair for a drum brake

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7334809U (en) * 1974-01-10 Eisenwerk Grümer KG, 5276 Wiehl Braking device for trailer vehicles
DE2264615A1 (en) * 1972-11-25 1974-09-12 Gruemer Eisenwerk INNER SHOE BRAKE

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7334809U (en) * 1974-01-10 Eisenwerk Grümer KG, 5276 Wiehl Braking device for trailer vehicles
DE2264615A1 (en) * 1972-11-25 1974-09-12 Gruemer Eisenwerk INNER SHOE BRAKE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3040572A1 (en) * 2014-12-08 2016-07-06 BPW FAHRZEUGTECHNIK GmbH & CO. KG Drum brake for a vehicle and brake pad pair for a drum brake

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: KNOTT GMBH, 8201 EGGSTAETT, DE

8139 Disposal/non-payment of the annual fee