EP0739284A1 - Servomoteur d'assistance de freinage, a securite de montage accrue - Google Patents

Servomoteur d'assistance de freinage, a securite de montage accrue

Info

Publication number
EP0739284A1
EP0739284A1 EP95903382A EP95903382A EP0739284A1 EP 0739284 A1 EP0739284 A1 EP 0739284A1 EP 95903382 A EP95903382 A EP 95903382A EP 95903382 A EP95903382 A EP 95903382A EP 0739284 A1 EP0739284 A1 EP 0739284A1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
rim
elements
flange
envelope
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.)
Ceased
Application number
EP95903382A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean Pierre Gautier
Ulysse Verbo
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.)
Bosch Systemes de Freinage SAS
Original Assignee
AlliedSignal Europe Services Techniques
Bosch Systemes de Freinage SAS
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 AlliedSignal Europe Services Techniques, Bosch Systemes de Freinage SAS filed Critical AlliedSignal Europe Services Techniques
Publication of EP0739284A1 publication Critical patent/EP0739284A1/fr
Ceased 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
    • B60T13/569—Vacuum systems indirect, i.e. vacuum booster units characterised by piston details, e.g. construction, mounting of diaphragm

Definitions

  • the present invention relates to a pneumatic brake booster, comprising a rigid envelope separated into at least two chambers by means of an elastically deformable diaphragm having a flange, this envelope being composed of at least two elements whose respective edges have folds of complementary curvature, are crimped one on the other, and enclose the edge of the diaphragm.
  • a problem conventionally encountered in the manufacture of these servomotors is that of the effectiveness of maintaining the diaphragm, not only because it is subjected to significant efforts but also because its mounting, relatively delicate, must nevertheless be carried out in a manner perfect for ensuring the necessary outfit.
  • the reject rate corresponding to the servomotors whose diaphragm is insufficiently maintained given the level of safety sought is not zero.
  • the invention relates to a servomotor of simple structure but whose diaphragm has a very high resistance to tearing forces.
  • the booster of the invention is essentially characterized in that the fold which is formed on at least one of the elements of the envelope has at least one orifice through from which the rim of the diaphragm is extruded by the pressure exerted on this rim by the folds of the elements of the envelope.
  • the aforementioned orifice is preferably provided at the level of the section of lesser thickness ledge
  • FIG. 1 is a partial sectional view of a traditional booster
  • FIG. 2 is a detailed partial sectional view of a booster according to a preferred embodiment of the invention.
  • FIG. 3 is a partial sectional view of a booster according to another possible embodiment of the invention.
  • Figure 1 which illustrates only the general field of the invention, it relates to a pneumatic brake booster, comprising a rigid casing 1 separated into at least two chambers 2, 3 by means of a elastically deformable diaphragm 4 having a flange 40.
  • the envelope 1 is composed of at least two elements 1 1, 12 whose respective edges have folds l ia, 12a of complementary curvature, are crimped on one another, and enclose the flange 40 of the diaphragm.
  • the fold which is formed on at least one of the elements of the envelope for example the fold 11a of the element 11 (FIG. 2), has at least one orifice 110 through which the flange 40 of the diaphragm 4 is extruded by the pressure exerted on this rim by the folds l ia, 12a of the elements of the envelope.
  • the orifice 110 is preferably provided, as shown in the figure 2, at the thinner section 40b of the rim.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
EP95903382A 1994-01-19 1994-12-09 Servomoteur d'assistance de freinage, a securite de montage accrue Ceased EP0739284A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9400548 1994-01-19
FR9400548A FR2715117B1 (fr) 1994-01-19 1994-01-19 Servomoteur à sécurité de montage accrue.
PCT/FR1994/001435 WO1995019902A1 (fr) 1994-01-19 1994-12-09 Servomoteur d'assistance de freinage, a securite de montage accrue

Publications (1)

Publication Number Publication Date
EP0739284A1 true EP0739284A1 (fr) 1996-10-30

Family

ID=9459185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95903382A Ceased EP0739284A1 (fr) 1994-01-19 1994-12-09 Servomoteur d'assistance de freinage, a securite de montage accrue

Country Status (8)

Country Link
EP (1) EP0739284A1 (pt)
JP (1) JPH09507664A (pt)
KR (1) KR960706421A (pt)
CN (1) CN1137252A (pt)
BR (1) BR9407437A (pt)
FR (1) FR2715117B1 (pt)
TR (1) TR28454A (pt)
WO (1) WO1995019902A1 (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2860472B1 (fr) * 2003-10-06 2006-01-20 Bosch Gmbh Robert Servomoteur pneumatique d'assistance au freinage comportant un diaphragme serti
CN105179534A (zh) * 2015-10-21 2015-12-23 上海拜克橡胶件有限公司 一种制动气室橡胶隔膜

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3438026A1 (de) * 1983-11-03 1985-05-15 Lucas Industries P.L.C., Birmingham, West Midlands Pneumatischer kraftverstaerker, insbesondere fuer bremsanlagen fuer kraftfahrzeugen
EP0300857B1 (fr) * 1987-07-21 1991-12-18 Alliedsignal Europe Services Techniques Procédé d'assemblage d'un servomoteur et servomoteur assemblé suivant ce procédé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9519902A1 *

Also Published As

Publication number Publication date
WO1995019902A1 (fr) 1995-07-27
JPH09507664A (ja) 1997-08-05
FR2715117A1 (fr) 1995-07-21
TR28454A (tr) 1996-07-01
FR2715117B1 (fr) 1996-03-01
KR960706421A (ko) 1996-12-09
BR9407437A (pt) 1996-04-09
CN1137252A (zh) 1996-12-04

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Legal Events

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