[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP1419078A1 - Servofrein automobile a depression protege contre les chocs - Google Patents

Servofrein automobile a depression protege contre les chocs

Info

Publication number
EP1419078A1
EP1419078A1 EP02794574A EP02794574A EP1419078A1 EP 1419078 A1 EP1419078 A1 EP 1419078A1 EP 02794574 A EP02794574 A EP 02794574A EP 02794574 A EP02794574 A EP 02794574A EP 1419078 A1 EP1419078 A1 EP 1419078A1
Authority
EP
European Patent Office
Prior art keywords
section
housing
brake booster
vacuum brake
bolt
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Withdrawn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
EP02794574A
Other languages
German (de)
English (en)
Inventor
Kurt Saalbach
Wilfried Wagner
Kai-Michael Graichen
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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 Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP1419078A1 publication Critical patent/EP1419078A1/fr
Withdrawn legal-status Critical Current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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
    • B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
    • B60T13/5675—Supportstruts

Definitions

  • the invention relates to a vacuum brake booster for motor vehicles with an booster housing, which has two mutually opposite housing halves, with at least one movable wall that divides the interior of the booster housing, and with at least one power transmission bolt, which is parallel to the longitudinal axis of the booster housing
  • Vacuum brake booster extends from one housing half to the housing half located on the opposite side of the movable wall, is sealed off from the movable wall and at the ends of which fastening elements for a body wall or a master brake cylinder connected downstream of the vacuum brake booster are formed.
  • Such a vacuum brake booster is known from German patent DE 28 45 794. What is less advantageous with the known vacuum brake booster is its unfavorable deformation behavior in accidents that lead to deformation of the front part of the motor vehicle. The reason for this are the force transmission bolts which increase the rigidity of the amplifier housing, which have a relatively large diameter and which offer too great resistance to deformation of the amplifier in the event of an accident. As a result, the bulkhead of the vehicle is deformed, thereby changing the position of the bearing for the pedal, so that the pedal can injure the driver in an accident. Details of this are described in DE 19524492.
  • the present invention is therefore based on the object of proposing novel measures for a vacuum brake booster of the type resulting from the preamble of claim 1, which enable a further improvement of its deformation behavior in the event of accidents.
  • a first solution to this problem is that the force transmission pin has at least a first section and a second section, and that the material cross section of the first section is chosen so small compared to the material cross section of the second section that it extends in the longitudinal direction when a predetermined force is exceeded of the bolt extending length is shortened. This gives a very simple construction, avoiding the separate insertion of special predetermined breaking points. The shortening of the first section is achieved solely by its reduced strength or its reduced strength compared to the second section.
  • the position of the shortening resulting from compression or buckling is determined by the position of the first section.
  • the first section is formed by a hollow cylinder whose wall thickness is selected so small that the first section shortens its length extending in the longitudinal direction of the bolt when a predetermined force is exceeded. This provides an option especially in the event that a screw protruding through the amplifier is to be screwed to the bulkhead from the THZ. In this case, the screw can be moved through the Hollow cylinders of the first section are introduced, the outer lateral surface of which is sealed off from the interior of the housing.
  • the second section is also preferably designed as a hollow cylinder, which is aligned with the hollow cylinder of the first section, in accordance with the combination of features according to claim 3.
  • a sealed through opening is thus obtained, through which the screw can be passed for fastening.
  • a screw located in the first section would significantly increase its strength.
  • a buckling or compression of the first section with a sufficiently large longitudinal force acting on it would therefore no longer be guaranteed.
  • the screw is sunk so deeply into the hollow cylinder of the first section that the screw can no longer contribute to reinforcing the first section.
  • the first and the second section are formed in one piece or are non-detachably connected to one another.
  • the permanent connection can be produced, for example, by welding, soldering, gluing, positive locking or the like
  • a simple way of supporting forces acting on the second section can be achieved in that the first section is provided with a projection, preferably formed by deformation, on which compressive forces or possibly tensile forces acting on the first housing half are supported.
  • the force transmission pin has at least a first section and a second section, that the first section and the second section are formed by hollow cylinders, that the first and the second section by a holding connection in the longitudinal direction of the Bolts are fixed against each other that when a predetermined force acting in the longitudinal direction of the bolt is exceeded, the holding connection is released and the two sections are telescopically displaced into one another and that through the second section a fastening screw protrudes with its screw head on the end face of the second section forming cylinder and with its threaded end protrudes through the second housing half facing the body wall.
  • FIG. 1 shows a vacuum brake booster with a bolt known from DE 19523021 for a better understanding of the already known state of the art.
  • Fig. 2 shows a first embodiment of the invention and Fig.3 shows a second embodiment of the invention.
  • the vacuum brake booster 1 shown in Fig.l has a booster housing 2 formed by two interconnected housing halves 20, 21, the housing half 20 shown in particular in Fig.
  • a control housing 8 is displaceably guided in a sliding sealing ring 3, in which a control valve 9 is arranged which can be actuated by means of an input element 4 coupled to a brake pedal, not shown.
  • control housing 8 At its end facing away from the input member 4, the control housing 8 carries a movable wall 5 formed by a diaphragm plate 22 and a roller membrane 23 lying thereon, which divides the interior of the brake booster housing 2 into an evacuable vacuum chamber 6 and a working chamber 7, the control valve 9 connecting between the working chamber 7 and the vacuum chamber 6 or the atmosphere.
  • the control valve 9 is preferably formed by two coaxial annular sealing seats 10, 11 which cooperate with a rotationally symmetrical elastic valve body 12, for example a poppet valve, or rest against it in the release position of the vacuum brake booster 1.
  • the first sealing seat 10, the opening of which enables the two chambers 6, 7 to be connected to one another, is formed in the control housing 8.
  • the second sealing seat 11 the opening of which enables the working chamber 7 to be ventilated, is formed on a valve piston 15 which is guided in the control housing 8 and communicates with the input member 4 and transmits force.
  • the valve piston 15 is in force-transmitting connection with a rubber-elastic reaction disk 13 which is arranged in a cylindrical recess 16 of the control housing 8 and which transmits both the actuating force introduced at the input member 4 and the amplifying force applied by the movable wall 5 to an output member 14
  • BESTATIGUNGSKOPIE enables that cooperates with a master cylinder piston, not shown.
  • two rod-shaped force transmission bolts are preferably provided, which are arranged parallel to the longitudinal axis of the brake booster and one of which is shown and provided with the reference number 17.
  • the control housing 8 carrying the movable wall 5 is guided on this connecting bolt 17, and can therefore move freely in the axial direction during operation.
  • the sealing of the force transmission bolts 17, in passage openings 19 formed in the control housing 8, is preferably carried out by means of sliding seals formed in one piece with the rolling diaphragm 23, of which the one assigned to the force transmission bolt 17 is shown and provided with the reference numeral 24.
  • Attaching vacuum brake booster 1 to the body bulkhead are assigned to the two housing halves 20, 21, fastening elements 25, 26, which are formed at the ends of the force transmission bolts 17.
  • the force transmission bolts 17 are provided with three radial grooves or notches 18, 27, 28. While the grooves or notches 18 and 28 are formed in the area of the fastening elements 25, 26, the third groove or notch 27 is located in the area of the passage openings 19 provided in the control housing 8, through which the force transmission bolt 17 extends and which extends before mentioned sliding seal 24 takes.
  • the force transmission bolts 17 can also preferably be extrusion-coated with a lubricious plastic layer 56.
  • a disadvantage of the known solution is in particular that the amplifier cannot be screwed directly to the bulkhead by a screw protruding through the housing without reducing the crash safety of the amplifier. How this is nevertheless possible according to the invention is shown in FIG. Only the components modified compared to FIG. 1 are described.
  • FIG. 2 shows a bolt 101 for power transmission, which is formed from a first section 102 and a second section 103.
  • a fastening screw 112 protrudes through the housing wall 120 of a first housing part 121.
  • the fastening screw 2 has a bore 122.
  • the bore 122 receives the end of the first section 102, which is held so tightly in the housing 121.
  • a peripheral edge 123 absorbs the tensile forces acting on the first section 102.
  • the first section 102 is sealed by means of a seal 114. External forces acting on the first section 102 are emitted to the housing 121 via a peripheral projection 105 on the first section 102 via a spacer disk 106.
  • the second section 103 is tightly connected to the first section 102.
  • a step 108 is provided in the area of the connection, via which longitudinal forces in FIG. 2 can be transmitted to the right via a screw 117.
  • the structure of the connection between the first section 102 and the second section 103 shown in FIG. 2 is not mandatory for the invention.
  • the two sections can also be connected to one another in one piece. It is only essential that a projection is present, via which a screw 117 on the Bolt 101 can attack with its two sections, so that the screw in Figure 2 can exert longitudinal forces to the right, with which the amplifier can be pulled against the bulkhead.
  • the section 103 is sealingly placed against a wall of the second housing part, not shown, that the screw 117 is able to exert longitudinal forces over its edge 110 on the second housing part, not shown.
  • the illustrated notch of the screw 117 has already been described in its function in connection with FIG. 1, but is not mandatory in the present exemplary embodiment.
  • the screw 117 can have a hexagon socket 118, via which it can be tightened from the outside by means of a tool that extends through the first section 102.
  • the strength of the first section 102 against longitudinal forces, in particular compressive forces is very much lower than that of the second section 103, which not only has a greater wall thickness but is also reinforced by the screw 117 against lateral forces .
  • the screw 117 thus has two functions, it not only serves to fasten the booster to the bulkhead, but at the same time also reinforces the strength of the second section 103. In addition, it is possible in this way to determine the location of the deformation of the bolt in a crash more precisely.
  • the bolt must be able to absorb the longitudinal and compressive forces necessary for the operation of the amplifier without being deformed. On the other hand, it should be shortened compared to the normal distance between its two ends in the event that the compressive forces acting on it determine a particular one Exceed value.
  • the second section 103 of the bolt must also be able to absorb the additional longitudinal forces required to hold the amplifier on the bulkhead. The first section must continue to be able to act on the second housing part 121 by a simple measure, which in the present case is done by the peripheral projection 105
  • the solution according to FIG. 3 differs from the solution according to FIG. 2 in the following.
  • the wall thickness of the first section 102 is just as strong as the wall thickness of the second section 103.
  • the connection 119 between the first section 102 and the second section 102 is selected such that they are blown in the longitudinal direction of the bolt 101 by a sufficiently large force can.
  • the force necessary to disconnect the connection is greater than the forces normally occurring during the operation of the amplifier. This force occurs in a crash. If the connection is released in the event of a crash, longitudinal forces can no longer be transmitted via the bolt 101 and the second section 102 is pushed telescopically over the second section 103, so that the length of the bolt 101 is shortened.

Landscapes

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

Abstract

L'invention vise à améliorer le comportement de déformation d'un servofrein à dépression comportant des axes de transmission de force (101) servant à transmettre des forces sur un tablier de carrosserie d'un véhicule. A cet effet, les axes de transmission de force (101) sont constitués de deux sections (102, 103) de rigidité différente. Pour atteindre une rigidité suffisante lors de l'utilisation d'une vis de fixation (117) dans une première section (102), la première section est conçue en tant que corps creux, et la vis de fixation s'étend uniquement sur la longueur d'une deuxième section (102) de l'axe (101). Comme la première section est conçue en tant que corps creux, la vis située dans la deuxième section peut être actionnée au travers de la première section.
EP02794574A 2001-08-10 2002-08-07 Servofrein automobile a depression protege contre les chocs Withdrawn EP1419078A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10138301A DE10138301A1 (de) 2001-08-10 2001-08-10 Gegen Crash gesicherter Unterdruckbremskraftverstärker für Kraftfahrzeuge
DE10138301 2001-08-10
PCT/EP2002/008831 WO2003013926A1 (fr) 2001-08-10 2002-08-07 Servofrein automobile a depression protege contre les chocs

Publications (1)

Publication Number Publication Date
EP1419078A1 true EP1419078A1 (fr) 2004-05-19

Family

ID=7694388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02794574A Withdrawn EP1419078A1 (fr) 2001-08-10 2002-08-07 Servofrein automobile a depression protege contre les chocs

Country Status (5)

Country Link
US (1) US20050172801A1 (fr)
EP (1) EP1419078A1 (fr)
JP (1) JP2004537467A (fr)
DE (1) DE10138301A1 (fr)
WO (1) WO2003013926A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2855130B1 (fr) * 2003-05-22 2005-07-15 Bosch Gmbh Robert Servomoteur pneumatique d'assistance de freinage d'un vehicule comportant au moins un tirant
FR2882316B1 (fr) * 2005-02-18 2007-04-20 Bosch Gmbh Robert Tirant pour servomoteur d'assistance au freinage d'un vehicule et servomoteur appliquant un tel tirant
DE102006033533A1 (de) * 2006-07-20 2008-01-24 Continental Teves Ag & Co. Ohg Bremsbetätigungsvorrichtung
DE102006034439A1 (de) * 2006-07-26 2008-01-31 Continental Teves Ag & Co. Ohg Bremsbetätigungsvorrichtung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS264254B2 (en) 1977-10-20 1989-06-13 Girling Ltd Servo system for vehicle brakes system
SU1259960A3 (ru) * 1978-05-20 1986-09-23 Гирлинг Лимитед (Фирма) Усилитель тормозной системы
ZA795365B (en) * 1978-10-18 1980-09-24 Lucas Industries Ltd Master cylinder assemblies for vehicle braking systems
ES2024712B3 (es) * 1988-02-29 1992-03-01 Bendix Europe Services Techniques S A Servomotor de asistencia al frenado.
FR2715903B1 (fr) * 1994-02-04 1996-05-03 Alliedsignal Europ Services Servomoteur d'assistance de freinage, à sécurité accrue.
FR2727922A1 (fr) * 1994-12-09 1996-06-14 Alliedsignal Europ Services Servomoteur a enveloppe deformable
DE19523021A1 (de) * 1995-06-24 1997-01-02 Teves Gmbh Alfred Unterdruckbremskraftverstärker für Kraftfahrzeuge
DE19524492B4 (de) * 1995-07-05 2009-01-02 Daimler Ag Bremskraftverstärker mit Verbindungsbolzen
GB9519753D0 (en) * 1995-09-28 1995-11-29 Lucas Ind Plc Improvements in pneumatically-operated boosters for vehicle braking systems
GB2339607A (en) * 1998-07-16 2000-02-02 Delphi France Automotive Sys A brake booster

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03013926A1 *

Also Published As

Publication number Publication date
WO2003013926A1 (fr) 2003-02-20
DE10138301A1 (de) 2003-02-27
JP2004537467A (ja) 2004-12-16
US20050172801A1 (en) 2005-08-11

Similar Documents

Publication Publication Date Title
EP0832020B1 (fr) Servofrein a depression pour vehicules a moteur
EP2637912B1 (fr) Bielette avec protection de surcharge
DE602004002232T2 (de) Elektronisches Gerät
DE102015204894A1 (de) Lenksäule für ein Kraftfahrzeug
DE19849262A1 (de) Teleskopierbare Lenkspindel mit einem Deformationskörper
WO2006122603A1 (fr) Mecanisme de direction
WO2015172759A1 (fr) Gâche pour serrure de porte de véhicule automobile
DE102008009964A1 (de) Kollision-Detektorvorrichtung und Schutzsystem
DE2321915A1 (de) Zusammenschiebbare lenksaeulenanordnung
DE102008000936B4 (de) Radaufhängung für ein Fahrzeug und Verbindungselement für eine solche Radaufhängung
EP2583845A1 (fr) Agencement de stabilisateur
EP1993892B1 (fr) Servofrein pneumatique
EP1419078A1 (fr) Servofrein automobile a depression protege contre les chocs
WO1997034790A1 (fr) Maitre-cylindre
DE102012013964B4 (de) Vorrichtung zum Andrücken einer Zahnstange an ein Ritzel
DE19524492B4 (de) Bremskraftverstärker mit Verbindungsbolzen
EP2748489B1 (fr) Système d'assistance au changement de rapports de transmission
DE29514063U1 (de) Bremskraftverstärker/Hauptzylinder-Einheit mit Verbindungsbolzen
DE102005010211B4 (de) Parksperrenmechanismus für ein Kraftfahrzeug, welches ein Automatgetriebe oder ein automatisiertes Handschaltgetriebe umfasst
DE102022204460B3 (de) Betätigungseinrichtung für die Betätigung eines Getriebeelements
DE102018208805A1 (de) Verbindungsanordnung mit kraftübertragender Hülse, Kraftfahrzeugrahmen und Kraftfahrzeug mit einer solchen Verbindungsanordnung
EP1493648B1 (fr) Dispositif de direction pour un véhicule
DE102005005400A1 (de) Vorrichtung zum Andrücken einer Zahnstange an ein mit der Zahnstange in Eingriff stehendes Ritzel
DE4228656A1 (de) Unterdruckbremskraftverstärker für Kraftfahrzeuge
DE102022102913A1 (de) Fahrzeug-Befestigungsanordnung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040310

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17Q First examination report despatched

Effective date: 20040528

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20041207