DE3048749A1 - Load-dependent braking force regulator - has fingers with recesses tapering towards piston axis in faces against membrane - Google Patents

Load-dependent braking force regulator - has fingers with recesses tapering towards piston axis in faces against membrane

Info

Publication number
DE3048749A1
DE3048749A1 DE19803048749 DE3048749A DE3048749A1 DE 3048749 A1 DE3048749 A1 DE 3048749A1 DE 19803048749 DE19803048749 DE 19803048749 DE 3048749 A DE3048749 A DE 3048749A DE 3048749 A1 DE3048749 A1 DE 3048749A1
Authority
DE
Germany
Prior art keywords
fingers
membrane
regulator
load
force regulator
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.)
Granted
Application number
DE19803048749
Other languages
German (de)
Other versions
DE3048749C2 (en
Inventor
Heiner 7300 Esslingen Gaßmann
Hans-Reimer 7141 Möglingen Speck
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19803048749 priority Critical patent/DE3048749A1/en
Publication of DE3048749A1 publication Critical patent/DE3048749A1/en
Application granted granted Critical
Publication of DE3048749C2 publication Critical patent/DE3048749C2/de
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T8/00Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • B60T8/1812Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction
    • B60T8/1825Means for changing the diaphragm area submitted to pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The braking force regulator is dependent on the load. It has a membrane with a variable working surface area, and a support for the membrane with radial fingers fitting between each other. These fingers are fixed half to one and half to the other of two regulator members, whose position in relation to each other in the axial direction varies as the regulator operates, so as to vary the degree of support for the membrane. The fingers (4,6) of one or both members e.g. housing (3) or piston (1), have recesses (11) tapering towards the piston axis in their faces (9,10) in contact with the membrane, and which are deeper than corresponding radial bent sections in the membrane.

Description

Lastabhängiger BremskraftreglerLoad-dependent brake force regulator

S@and der Technik Die Erfindung geht aus von einem lastabhängigen Bremskraftregler nach der Gattung des Hauptanspruchs. Bin derartiger Bremskraftregler ist bekannt (AT-PS 233 993).S @ and der Technik The invention is based on a load-dependent Brake power regulator according to the preamble of the main claim. Am such a brake force regulator is known (AT-PS 233 993).

durch mehr oder weniger tiefes Eintauchen der am Reglerkolben befestigten und von diesem in ihrer axialen Lage verstellbaren Finger in Bezug auf die gehäusefesten Finger des Gehäuseteils wird der wirksame Durchmesser der Membran verändert. rind zwar wird der jeweils gehäusefest abgestützte Membrantei; wirkungslos gehalten. Dabei besteht das Problem, daß die Finger des inneren, bewegli-@@@@ Teil@ an ihrem äußeren Bereich einen verhältnismäßig groi3en Bogenabstand voneinander haben. Dadurch beult sich in diesem Bereich die Membran zwischen den Fingern durch.by immersing the ones attached to the regulator piston more or less deeply and by this finger, which is adjustable in its axial position, with respect to the finger fixed to the housing Finger of the housing part changes the effective diameter of the membrane. beef although the membrane is supported in each case fixed to the housing; held ineffective. The problem here is that the fingers of the inner, movable part @ on their outer area have a relatively large arc distance from each other. Through this The membrane between the fingers bulges in this area.

Andererseits muß aber durch entsprechendes axiales Eindringen der finger des anderen Teils der jeweils wirksame Durchmesser der Membran genau bestimmbar sein, um einen gewissen lastabhängig festgelegten Bremsdruck zu den Bremszylindern einzusteuern.On the other hand, however, by appropriate axial penetration of the finger of the other part of the respective effective diameter of the membrane can be precisely determined be to a certain load-dependent fixed brake pressure to the brake cylinders to steer.

Das Durchbeulen der Membran bewirkt aber nun deren Aufliegen an Stellen der gehäusefesten Finger, die außerhalb des Wirkdurchmessers liegen. Dadurch verändern sich die Reglereinstellung und die Regelcharakteristik des Reglers.However, the bulging of the membrane now causes it to rest in places the fingers that are fixed to the housing and are outside the effective diameter. Change thereby the controller setting and the control characteristics of the controller.

Vorteile der Erfindung Der lastabhängige Bremskraftregler mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß sein einmal eingestellter Wirkdurchmesser durch ein Ausbeulen der Membran zwischen den Fingern nicht verändert wird. Die Regelcharakteristik bleibt also unverändert.Advantages of the invention The load-dependent brake force regulator with the characterizing features of the main claim has the advantage that his Once the effective diameter has been set, the membrane bulges between the Fingers is not changed. The control characteristics therefore remain unchanged.

Zeichnung Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und zwar zeigen: Figur 1 einen Querschnitt durch einen Bremskraftregler im Bereich der für die Membranabstützung benötigten, axial ineinander greifenden Finger, Figur 2 einen Schnitt nach der Linie II-II in Figur 1 und Figur 3 einen Schnitt nach der Linie III-III in Figur Beschreibung des Ausführungsbeispieles Ein nicnt näher dargestellter lastabhängiger Bremskraftregler hat zwei Teile, einen Reglerkolben 1, der eine Achse 2 hat, und ein Reglergehäuse 3, in dem der Reglerkolben 1 axialbeweglich angeordnet ist. Der Reglerkolben 1 hat gleichmäßig auf den Umfang verteilt achtzehn Finger 4, auf deren einer Stirnseite eine Membran 5 aufliegt. Diese Membran unterliegt einem Druckmitteldruck, so daß sie eine Kraft auf den Reglerkolben 1 ausübt, wodurch dieser zum Zweck einer Ventilbetätigung Im Bremskraftregler verstellbar ist.Drawing An embodiment of the invention is shown in the drawing shown, namely: Figure 1 shows a cross section through a braking force regulator in the area of the axially interlocking ones required for the membrane support Finger, Figure 2 a section along the line II-II in Figure 1 and Figure 3 a Section along the line III-III in FIG. Description of the exemplary embodiment A The load-dependent brake force regulator not shown in detail has two parts, one Regulator piston 1, which has an axis 2, and a regulator housing 3, in which the regulator piston 1 is arranged to be axially movable. The regulator piston 1 has evenly on the circumference distributed eighteen fingers 4, on one end of which a membrane 5 rests. This membrane is subject to a pressure medium pressure, so that it has a force on the governor piston 1 exerts, whereby this for the purpose of a valve actuation in the brake force controller is adjustable.

Zwischen den auf diese Weise axialbeweglichen Fingern 4 sind in gleicher Anzahl feststehende Finger 6 angeordnet, die an das Gehäuse 3 angeformt sind. Diese Finger 6 sind keilförmig ausgebildet, um den nach außen größer werdenden Spalt zwischen den verstellbaren Fingern 4 auszufüllen.Between the fingers 4, which are axially movable in this way, are the same Number of fixed fingers 6, which are molded onto the housing 3. These Fingers 6 are wedge-shaped to the outwardly increasing gap between the adjustable fingers 4 to fill in.

Dieser größer werdende Spalt veranlaßt nun aber die Membran 5 sich bei Druckeinwirkung in axialer Richtung durch zubiegen und auszubeulen. Eine solche radial verlaufende Durchbiegung 7 ist in der Figur 3 dargestellt, während die Figur 2 einen wirksamen Durchmesser 8 der Membran 5 zeigt, der an dem Schnittpunkt von schräg verlaufenden embranberührungsflächen 9 und 10 der beiden Gruppen von Fingern 4 und 6 liegt. Von diesem wirksamen Durchmesser 8 nach außen gesehen ist die Membran 5 wirkungslos, weil sie über die Finger 6 gehäusefest abgestützt ist. Wenn durch ihre Durchbiegung 7 die Membran 5 außerhalb des wirk-@amen @urchmessers 8 an den Fingern 6 eine Anlage fände, wir dr wirksame Durchmes3er 8 nach außen verändert und die Regelcharakteristik des Reglers wäre eine andere.However, this increasing gap now causes the membrane 5 itself when subjected to pressure in the axial direction by bending and bulging. Such radially extending deflection 7 is shown in Figure 3, while the figure Fig. 2 shows an effective diameter 8 of the membrane 5, which is at the intersection of fig obliquely extending membrane contact surfaces 9 and 10 of the two groups of fingers 4 and 6 lies. The membrane is seen from this effective diameter 8 to the outside 5 ineffective because it is supported by the fingers 6 fixed to the housing. When through their deflection 7 the membrane 5 outside of the effective @ amen @diameter 8 to the Fingers 6 would find an attachment, we changed the effective diameter 8 outwards and the control characteristics of the controller would be different.

Dies wird aber gemäß der Erfindung durch eine Aussparung 11 an den Membranberührungsflächen 9 jedes festehenden fingers @ vermieden, deren Tiefe 12 derart bemessen ist, daß di tiefste Stelle 13 der Durchbiegung 7 genügend Abstand von den Fingern 6 hat. In Ansicht (Figur 1) ist die Aussparung 11 der Keilform der Finger 6 angepaßt.But this is according to the invention by a recess 11 to the Membrane contact surfaces 9 of each fixed finger @ avoided, the depth of which is 12 is dimensioned such that the deepest point 13 of the deflection 7 is sufficiently spaced of fingers 6 has. In the view (Figure 1), the recess 11 of the wedge shape Finger 6 adapted.

Claims (2)

Ansprüche Lastabhängiger Bremskraftregler mit einer wirkflächenveränderlichen Membran und einer Membranabstützung, die radial ineinandergreifende Finger aufweist, die je zur Hälfte an Reglerteilen befestigt sind, deren axiale Lage zueinander bei der Arbeit des Reglers veränderbar ist, um die Membranbstützung zu variieren, dadurch gekenzeichnet, daß die Finger (4, b) mindestens eines Reglerteil (Reglergehäuse 3, Reglerkolben 1) an ihrer Membranberührungsfläche (9, 10) in Richtung auf die Reglerkolbenachse (3) keilförmig verlaufende Aussparungen (11) aufweisen, die tiefer sind als entsprechend radial verlaufende Membran-Durchbiegungen (7).Claims Load-dependent brake force regulator with a variable effective area Membrane and a membrane support that has radially interdigitated fingers, half of which are attached to controller parts, their axial position to one another the work of the regulator is changeable to vary the diaphragm support, thereby marked that the fingers (4, b) at least one controller part (controller housing 3, regulator piston 1) on their diaphragm contact surface (9, 10) in the direction of the Regulator piston axis (3) have wedge-shaped recesses (11) which are deeper are as corresponding radially extending diaphragm deflections (7). 2. Lastabhängiger Bremskraftregler nach Anspruch 1, dadurch gekennzeichnet, daß die keilförmig verlaufenden Aussparungen (11) an dem Reglerteil (Reglergehäuse 3) :Ingebracht sind, das in Umfangsrichtung die breiteren Finger (6) hat.2. Load-dependent brake force regulator according to claim 1, characterized in that that the wedge-shaped recesses (11) on the controller part (controller housing 3): Are brought in that has the wider fingers (6) in the circumferential direction.
DE19803048749 1980-12-23 1980-12-23 Load-dependent braking force regulator - has fingers with recesses tapering towards piston axis in faces against membrane Granted DE3048749A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803048749 DE3048749A1 (en) 1980-12-23 1980-12-23 Load-dependent braking force regulator - has fingers with recesses tapering towards piston axis in faces against membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803048749 DE3048749A1 (en) 1980-12-23 1980-12-23 Load-dependent braking force regulator - has fingers with recesses tapering towards piston axis in faces against membrane

Publications (2)

Publication Number Publication Date
DE3048749A1 true DE3048749A1 (en) 1982-07-22
DE3048749C2 DE3048749C2 (en) 1989-11-02

Family

ID=6120119

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803048749 Granted DE3048749A1 (en) 1980-12-23 1980-12-23 Load-dependent braking force regulator - has fingers with recesses tapering towards piston axis in faces against membrane

Country Status (1)

Country Link
DE (1) DE3048749A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374437A1 (en) * 1988-12-21 1990-06-27 WABCO Vermögensverwaltungs-GmbH Piston device with variable pressure area

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231584B (en) * 1961-11-04 1966-12-29 Westinghouse Bremsen Apparate Brake force regulators for vehicles, in particular motor vehicles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1231584B (en) * 1961-11-04 1966-12-29 Westinghouse Bremsen Apparate Brake force regulators for vehicles, in particular motor vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0374437A1 (en) * 1988-12-21 1990-06-27 WABCO Vermögensverwaltungs-GmbH Piston device with variable pressure area

Also Published As

Publication number Publication date
DE3048749C2 (en) 1989-11-02

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Legal Events

Date Code Title Description
8120 Willingness to grant licences paragraph 23
8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: B60T 8/30

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee