WO1995019902A1 - Servomoteur d'assistance de freinage, a securite de montage accrue - Google Patents
Servomoteur d'assistance de freinage, a securite de montage accrue Download PDFInfo
- Publication number
- WO1995019902A1 WO1995019902A1 PCT/FR1994/001435 FR9401435W WO9519902A1 WO 1995019902 A1 WO1995019902 A1 WO 1995019902A1 FR 9401435 W FR9401435 W FR 9401435W WO 9519902 A1 WO9519902 A1 WO 9519902A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- rim
- elements
- flange
- envelope
- Prior art date
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)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95903382A EP0739284A1 (fr) | 1994-01-19 | 1994-12-09 | Servomoteur d'assistance de freinage, a securite de montage accrue |
KR1019960702936A KR960706421A (ko) | 1994-01-19 | 1994-12-09 | 끼워맞춤 안전성을 증가시킨 제동서보 부스터(braking servo booster with increased safety of fitting) |
JP7519376A JPH09507664A (ja) | 1994-01-19 | 1994-12-09 | 取付安全性を増したブレーキサーボブースタ |
BR9407437A BR9407437A (pt) | 1994-01-19 | 1994-12-09 | Reforçador de servofreno pneumático |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR94/00548 | 1994-01-19 | ||
FR9400548A FR2715117B1 (fr) | 1994-01-19 | 1994-01-19 | Servomoteur à sécurité de montage accrue. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995019902A1 true WO1995019902A1 (fr) | 1995-07-27 |
Family
ID=9459185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1994/001435 WO1995019902A1 (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 (fr) |
JP (1) | JPH09507664A (fr) |
KR (1) | KR960706421A (fr) |
CN (1) | CN1137252A (fr) |
BR (1) | BR9407437A (fr) |
FR (1) | FR2715117B1 (fr) |
TR (1) | TR28454A (fr) |
WO (1) | WO1995019902A1 (fr) |
Families Citing this family (2)
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 |
Citations (2)
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 |
EP0300857A1 (fr) * | 1987-07-21 | 1989-01-25 | Alliedsignal Europe Services Techniques | Procédé d'assemblage d'un servomoteur et servomoteur assemblé suivant ce procédé |
-
1994
- 1994-01-19 FR FR9400548A patent/FR2715117B1/fr not_active Expired - Fee Related
- 1994-12-09 JP JP7519376A patent/JPH09507664A/ja active Pending
- 1994-12-09 WO PCT/FR1994/001435 patent/WO1995019902A1/fr not_active Application Discontinuation
- 1994-12-09 EP EP95903382A patent/EP0739284A1/fr not_active Ceased
- 1994-12-09 KR KR1019960702936A patent/KR960706421A/ko not_active Application Discontinuation
- 1994-12-09 BR BR9407437A patent/BR9407437A/pt not_active Application Discontinuation
- 1994-12-09 CN CN94194458A patent/CN1137252A/zh active Pending
- 1994-12-29 TR TR01376/94A patent/TR28454A/xx unknown
Patent Citations (2)
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 |
EP0300857A1 (fr) * | 1987-07-21 | 1989-01-25 | Alliedsignal Europe Services Techniques | Procédé d'assemblage d'un servomoteur et servomoteur assemblé suivant ce procédé |
Also Published As
Publication number | Publication date |
---|---|
EP0739284A1 (fr) | 1996-10-30 |
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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