FR2864498A1 - Pneumatic servomotor`s case for vehicle, includes elastic membrane with two ends fixed to respective chambers, such that metallic skirt slides along membrane according to membrane`s movements - Google Patents
Pneumatic servomotor`s case for vehicle, includes elastic membrane with two ends fixed to respective chambers, such that metallic skirt slides along membrane according to membrane`s movements Download PDFInfo
- Publication number
- FR2864498A1 FR2864498A1 FR0315497A FR0315497A FR2864498A1 FR 2864498 A1 FR2864498 A1 FR 2864498A1 FR 0315497 A FR0315497 A FR 0315497A FR 0315497 A FR0315497 A FR 0315497A FR 2864498 A1 FR2864498 A1 FR 2864498A1
- Authority
- FR
- France
- Prior art keywords
- membrane
- housing
- vehicle
- skirt
- movements
- 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
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
BOITIER POUR SERVOMOTEUR PNEUMATIQUE DE VEHICULE, SERVOMOTEURHOUSING FOR PNEUMATIC SERVOMOTOR OF VEHICLE, SERVOMOTOR
MUNI DE CE BOITIER ET PROCEDE DE FABRICATION D'UN TEL PROVIDED WITH THIS HOUSING AND METHOD FOR MANUFACTURING SUCH
SERVOMOTEURSERVOMOTOR
La présente invention se rapporte à un boîtier pour servomoteur pneumatique de véhicule, à un servomoteur muni de ce boîtier et à un procédé de fabrication d'un tel servomoteur. The present invention relates to a housing for a pneumatic vehicle servomotor, to a servomotor provided with this housing and to a method of manufacturing such a servomotor.
Un servomoteur est destiné à amplifier l'action exercée par le conducteur d'un véhicule sur une pédale de frein et à transmettre cette action amplifiée à un dispositif de freinage d'une (ou plusieurs) roue(s) du véhicule. A servomotor is intended to amplify the action exerted by the driver of a vehicle on a brake pedal and to transmit this amplified action to a braking device of one (or more) wheel (s) of the vehicle.
A cet effet, un servomoteur pneumatique 110 (figure 1) connu comporte un boîtier 112 coopérant avec une tige 114 de commande, reliée à la pédale 116 de frein, et avec une tige 118 de poussée reliée au maître-cylindre 119 solidaire du dispositif de freinage, de telle sorte que lorsque la tige 114 de commande est déplacée au moyen d'une commande f transmise par la pédale de frein, le servomoteur déplace la tige 118 au moyen d'une poussée F d'intensité supérieure à l'intensité de la commande f. For this purpose, a known pneumatic servomotor 110 (FIG. 1) comprises a housing 112 cooperating with a control rod 114, connected to the brake pedal 116, and with a thrust rod 118 connected to the master cylinder 119 secured to the brake device. braking, so that when the control rod 114 is moved by means of a command f transmitted by the brake pedal, the servomotor moves the rod 118 by means of a thrust F of intensity greater than the intensity of the command f.
Pour cela, le boîtier 112 comprend un couvercle 120, logeant un mécanisme 121 pneumatique, et un cylindre 122 coopérant avec le couvercle 120 de façon étanche. Le volume interne du boîtier 112 est divisé en une première chambre 124, dite chambre arrière, et en une deuxième chambre 126, dite 2864498 2 chambre avant, au moyen d'une membrane 128 étanche renforcée par une jupe rigide 130. For this, the housing 112 comprises a cover 120, housing a pneumatic mechanism 121, and a cylinder 122 cooperating with the cover 120 sealingly. The internal volume of the housing 112 is divided into a first chamber 124, called the rear chamber, and a second chamber 126, called the front chamber 2864498, by means of a tight membrane 128 reinforced by a rigid skirt 130.
Dans un premier temps, lorsque le servomoteur est inactif, la pression dans les chambres arrière 124 et avant 126 est maintenue inférieure à la pression atmosphérique au moyen d'un dispositif de pompage non représenté. In a first step, when the servomotor is inactive, the pressure in the rear chambers 124 and before 126 is kept below atmospheric pressure by means of a pumping device not shown.
Dans un deuxième temps, lorsque le conducteur du véhicule appuie sur la pédale 116 de frein, le piston 114 se déplace par l'action de la commande f et active le mécanisme 121 pneumatique de telle sorte qu'une entrée d'air à pression atmosphérique s'effectue dans la chambre arrière 124. In a second step, when the driver of the vehicle presses on the brake pedal 116, the piston 114 moves by the action of the control f and activates the pneumatic mechanism 121 so that an air inlet at atmospheric pressure is carried out in the rear chamber 124.
La pression dans la chambre arrière 124 étant supérieure à la pression dans la chambre 126, la membrane 128 et la jupe 130 sont soumises à une poussée F déplaçant la membrane 128, la jupe 130 et le piston 118 solidaire de ces dernières, transmettant ainsi une poussée F au maître-cylindre 119. The pressure in the rear chamber 124 being greater than the pressure in the chamber 126, the membrane 128 and the skirt 130 are subjected to a thrust F moving the membrane 128, the skirt 130 and the piston 118 integral with the latter, thus transmitting a thrust F to the master cylinder 119.
La présente invention résulte de la constatation que l'agencement d'une jupe métallique à une membrane, tel que précédemment décrit, présente de nombreux inconvénients. Ainsi, une longueur importante de membrane doit être utilisée pour recouvrir la jupe, augmentant le poids et le coût du boîtier. The present invention results from the observation that the arrangement of a metal skirt to a membrane, as previously described, has many disadvantages. Thus, a large membrane length must be used to cover the skirt, increasing the weight and cost of the housing.
De plus, un tel recouvrement requiert une opération coûteuse et complexe d'adhésion de la jupe sur la membrane. In addition, such a recovery requires a costly and complex operation of adhesion of the skirt on the membrane.
La présente invention remédie à ces inconvénients. The present invention overcomes these disadvantages.
Elle concerne un boîtier pour servomoteur pneumatique de véhicule muni d'une jupe métallique mobile et d'une membrane élastique assurant l'étanchéité entre deux chambres du boîtier, caractérisé en ce qu'une première extrémité de la membrane est fixée dans une première chambre tandis qu'une seconde extrémité de la membrane est fixée dans une seconde chambre de telle sorte que la jupe glisse le long de la membrane en fonction de ses déplacements. It relates to a housing for a pneumatic vehicle servomotor provided with a movable metal skirt and an elastic membrane sealing between two chambers of the housing, characterized in that a first end of the membrane is fixed in a first chamber while that a second end of the membrane is fixed in a second chamber so that the skirt slides along the membrane according to its movements.
Ainsi, grâce à l'invention, une faible longueur de membrane élastique, située entre les deux chambres, est 2864498 3 nécessaire pour assurer une étanchéité dans le boîtier, réduisant ainsi le poids et le coût d'un servomoteur. Thus, thanks to the invention, a short length of elastic membrane, located between the two chambers, is necessary to ensure a seal in the housing, thus reducing the weight and cost of a servomotor.
De plus, un boîtier conforme à l'invention ne requiert pas d'opérations d'adhésion de la membrane sur la jupe, ce qui 5 diminue à nouveau le coût du boîtier. In addition, a housing according to the invention does not require adhesion operations of the membrane on the skirt, which further decreases the cost of the housing.
Dans une réalisation, la membrane du boîtier comprend un matériau élastique tel que du caoutchouc. In one embodiment, the housing membrane comprises an elastic material such as rubber.
Selon une réalisation, cette membrane du boîtier comprend des fibres. In one embodiment, this membrane of the housing comprises fibers.
Dans une réalisation, la membrane du boîtier est utilisée comme enveloppe des deux chambres. In one embodiment, the membrane of the housing is used as the envelope of the two chambers.
L'invention concerne aussi un servomoteur pneumatique de véhicule muni d'une jupe métallique mobile et d'une membrane élastique assurant l'étanchéité entre deux chambres du boîtier. The invention also relates to a pneumatic vehicle servomotor provided with a movable metal skirt and an elastic membrane sealing between two chambers of the housing.
Selon l'invention, un tel servomoteur est caractérisé en ce qu'une première extrémité de la membrane est fixée dans une première chambre tandis qu'une seconde extrémité de la membrane est fixée dans une seconde chambre de telle sorte que la jupe glisse le long de la membrane en fonction de ses déplacements. According to the invention, such a booster is characterized in that a first end of the membrane is fixed in a first chamber while a second end of the membrane is fixed in a second chamber so that the skirt slides along of the membrane according to its displacements.
Finalement, l'invention concerne aussi un procédé de fabrication d'un servomoteur pneumatique de véhicule muni d'une jupe métallique mobile et d'une membrane élastique assurant l'étanchéité entre deux chambres du boîtier, ce procédé étant caractérisé en ce qu'on fixe une première extrémité de la membrane dans une première chambre tandis qu'une seconde extrémité de la membrane est fixée dans une seconde chambre de telle sorte que la jupe glisse le long de la membrane en fonction de ses déplacements. Finally, the invention also relates to a method of manufacturing a pneumatic vehicle servomotor provided with a movable metal skirt and an elastic membrane sealing between two chambers of the housing, this method being characterized in that fixed a first end of the membrane in a first chamber while a second end of the membrane is fixed in a second chamber so that the skirt slides along the membrane according to its movements.
D'autres caractéristiques et avantages de l'invention apparaîtront avec la description effectuée ci-dessous, à titre d'exemple non limitatif, en faisant référence aux figures ci-jointes sur lesquelles: la figure 1, déjà décrite, représente une vue en 35 coupe d'un servomoteur connu, et la figure 2 représente une vue en coupe d'un servomoteur conforme à l'invention. Other features and advantages of the invention will become apparent with the description given below, by way of non-limiting example, with reference to the attached figures in which: FIG. 1, already described, represents a view in FIG. section of a known booster, and Figure 2 shows a sectional view of a booster according to the invention.
- la figure 3 représente une vue en perspective d'un servomoteur conforme à l'invention utilisant des éléments 5 extérieurs destinés à rigidifier le boîtier. - Figure 3 shows a perspective view of a booster according to the invention using external elements for stiffening the housing.
Sur la figure 2 est représenté un servomoteur 200 muni d'une jupe 202 métallique et d'une membrane 204 élastique compris entre un couvercle 220 et un cylindre 222. FIG. 2 shows a servomotor 200 provided with a metallic skirt 202 and an elastic membrane 204 between a cover 220 and a cylinder 222.
Conformément à l'invention, la membrane élastique 204 est maintenue fixe par rapport au boîtier 206 tandis que la jupe 202 se déplace de façon à activer ou désactiver un dispositif de freinage commandé par la tige 208 de poussée solidaire de la jupe. According to the invention, the elastic membrane 204 is held fixed relative to the housing 206 while the skirt 202 moves to activate or deactivate a braking device controlled by the thrust rod 208 integral with the skirt.
Pour assurer l'étanchéité entre la chambre arrière 224 et la chambre avant 226 du servomoteur, une extrémité 203 de la jupe métallique est en contact constant avec la membrane 204. To seal between the rear chamber 224 and the front chamber 226 of the booster, one end 203 of the metal skirt is in constant contact with the membrane 204.
La membrane 204 est élastique de façon à se déformer et s'ajuster à la forme de l'extrémité de la membrane 203, optimisant ainsi l'étanchéité du dispositif. The membrane 204 is elastic so as to deform and adjust to the shape of the end of the membrane 203, thus optimizing the sealing of the device.
A cet effet, elle comprend un matériau élastique tel que du caoutchouc. Toutefois, de façon à renforcer sa résistance, elle peut comprendre des fibres. For this purpose, it comprises an elastic material such as rubber. However, in order to enhance its strength, it may include fibers.
Dans cette réalisation de l'invention, le boîtier ne comprend pas d'enveloppe métallique, la membrane délimitant avec 25 la jupe les chambres avant et arrière du boîtier. In this embodiment of the invention, the casing does not comprise a metal casing, the membrane defining with the skirt the front and rear chambers of the casing.
Par ailleurs, il convient de signaler que des moyens axiaux, par exemple des tirants 230 raccordent de manière rigide le couvercle 220 et le cylindre 222 de façon à empêcher des déformations importantes du boîtier 206. Furthermore, it should be pointed out that axial means, for example tie rods 230 rigidly connect the cover 220 and the cylinder 222 so as to prevent significant deformation of the housing 206.
Selon une variante, représentée sur la figure 3, des éléments extérieurs 232 sont utilisés pour rigidifier le boîtier 206 en solidarisant le couvercle 220 du cylindre 222. According to a variant, shown in FIG. 3, external elements 232 are used to stiffen the housing 206 by securing the cover 220 of the cylinder 222.
Il convient de signaler que de tels éléments 232 extérieurs peuvent être utilisés seuls ou en combinaisons avec 35 les tirants 230 décrits à la figure 2. It should be pointed out that such external elements 232 may be used alone or in combination with the tie rods 230 described in FIG. 2.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0315497A FR2864498B1 (en) | 2003-12-24 | 2003-12-24 | HOUSING FOR A PNEUMATIC SERVOMOTOR OF A VEHICLE, SERVOMOTOR PROVIDED WITH SAID HOUSING AND METHOD FOR MANUFACTURING SUCH A SERVOMOTOR. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0315497A FR2864498B1 (en) | 2003-12-24 | 2003-12-24 | HOUSING FOR A PNEUMATIC SERVOMOTOR OF A VEHICLE, SERVOMOTOR PROVIDED WITH SAID HOUSING AND METHOD FOR MANUFACTURING SUCH A SERVOMOTOR. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2864498A1 true FR2864498A1 (en) | 2005-07-01 |
FR2864498B1 FR2864498B1 (en) | 2006-03-17 |
Family
ID=34639660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0315497A Expired - Fee Related FR2864498B1 (en) | 2003-12-24 | 2003-12-24 | HOUSING FOR A PNEUMATIC SERVOMOTOR OF A VEHICLE, SERVOMOTOR PROVIDED WITH SAID HOUSING AND METHOD FOR MANUFACTURING SUCH A SERVOMOTOR. |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2864498B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2440295A1 (en) * | 1978-11-02 | 1980-05-30 | Lucas Industries Ltd | CONTROL SERVO AMPLIFIER ASSEMBLY |
FR2836440A1 (en) * | 2002-02-25 | 2003-08-29 | Bosch Gmbh Robert | Pneumatic brake assistance servomotor has annular air-filled membrane between edge of partition and cylindrical housing wall |
FR2837453A1 (en) * | 2002-03-21 | 2003-09-26 | Bosch Gmbh Robert | Pneumatic brake assistance servomotor has seal between working and low-pressure chambers formed on inner and outer edges of separating skirt |
-
2003
- 2003-12-24 FR FR0315497A patent/FR2864498B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2440295A1 (en) * | 1978-11-02 | 1980-05-30 | Lucas Industries Ltd | CONTROL SERVO AMPLIFIER ASSEMBLY |
FR2836440A1 (en) * | 2002-02-25 | 2003-08-29 | Bosch Gmbh Robert | Pneumatic brake assistance servomotor has annular air-filled membrane between edge of partition and cylindrical housing wall |
FR2837453A1 (en) * | 2002-03-21 | 2003-09-26 | Bosch Gmbh Robert | Pneumatic brake assistance servomotor has seal between working and low-pressure chambers formed on inner and outer edges of separating skirt |
Also Published As
Publication number | Publication date |
---|---|
FR2864498B1 (en) | 2006-03-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2602198A1 (en) | BRAKING DEVICE FOR A MOTOR VEHICLE COMPRISING A VACUUM AMPLIFIER AND AN INTEGRATED MASTER CYLINDER | |
FR2486004A1 (en) | BRAKE FORCE AMPLIFIER FOR MOTOR VEHICLES | |
FR2691691A1 (en) | Pneumatic actuator. | |
FR2479760A1 (en) | FORCE AMPLIFIER CONTROLLING MECHANICALLY, ESPECIALLY FOR HYDRAULIC BRAKING SYSTEMS OF MOTOR VEHICLES | |
FR2476572A1 (en) | DEVICE FOR ATTACHING THE MASTER CYLINDER AND THE CASING OF A BRAKE ASSIST DEVICE TO THE DASHBOARD OF A VEHICLE | |
FR2820388A1 (en) | REACTION DEVICE FOR A PNEUMATIC BRAKE SUPPORT SERVOMOTOR AND PNEUMATIC BRAKE ASSISTANCE SERVOMOTOR COMPRISING SUCH A DEVICE | |
FR2665407A1 (en) | BRAKE SYSTEM WITH ANTI-LOCK CONTROL FOR MOTOR VEHICLE. | |
FR2756240A1 (en) | ASSISTED BRAKING DEVICE WITH A VARIABLE ASSISTANCE RATIO AND REDUCED HYSTERESIS | |
FR2864498A1 (en) | Pneumatic servomotor`s case for vehicle, includes elastic membrane with two ends fixed to respective chambers, such that metallic skirt slides along membrane according to membrane`s movements | |
EP0230823A1 (en) | Brake servo with double reaction disc | |
FR2658466A1 (en) | ASSEMBLY OF A BRAKE ASSIST MOTOR AND A MASTER CYLINDER. | |
EP1548336B1 (en) | Housing for a pneumatic brake booster for a vehicle and brake booster comprising such a housing | |
EP0030197A1 (en) | Hydraulic-pressure generator | |
FR2724356A1 (en) | PNEUMATIC BRAKE SUPPORT SERVOMOTOR | |
EP1511662A1 (en) | Pneumatic valve for braking systems | |
EP1318934B1 (en) | Brake booster | |
FR2482214A1 (en) | PNEUMATIC SERVO-SUPPRESSOR | |
EP1518770B1 (en) | Main cylinder with enhanced security | |
EP1349761B1 (en) | Brake booster for motor vehicle | |
EP1346894B1 (en) | Pneumatic brake servo with improved seals | |
FR2848964A1 (en) | Pneumatic servomotor case for vehicle, has tight membrane separating rear and front chambers and inextendable bands applied on external surfaces of cylinder to reinforce resistance of case against action of cylinder | |
WO1996022208A1 (en) | Reduced-stroke power braking device | |
WO2003013927A1 (en) | Brake booster using a diaphragm with simplified mount | |
FR2559854A1 (en) | Long life double acting actuator | |
FR3001424A1 (en) | MECHANICAL-HYDRAULIC AMPLIFIER OF THE BRAKE FORCE WITH EXTENSION FOR AUTONOMOUS BRAKING |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PLFP | Fee payment |
Year of fee payment: 13 |
|
PLFP | Fee payment |
Year of fee payment: 14 |
|
ST | Notification of lapse |
Effective date: 20180831 |