WO2015000730A1 - Piston primaire de maitre-cylindre - Google Patents
Piston primaire de maitre-cylindre Download PDFInfo
- Publication number
- WO2015000730A1 WO2015000730A1 PCT/EP2014/063144 EP2014063144W WO2015000730A1 WO 2015000730 A1 WO2015000730 A1 WO 2015000730A1 EP 2014063144 W EP2014063144 W EP 2014063144W WO 2015000730 A1 WO2015000730 A1 WO 2015000730A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- primary piston
- sleeve
- master cylinder
- piston
- return spring
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
-
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/18—Connection thereof to initiating means
-
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/20—Tandem, side-by-side, or other multiple master cylinder units
Definitions
- the present invention relates to a tandem master cylinder primary piston formed of a body provided with a skirt and separating the rear of the primary piston push rod side and the front facing the primary chamber, this cavity before housing the return spring and its telescopic guide, the spring supported by one end against the bottom of the front cavity and the other end against an outer collar of the telescopic guide.
- the known primary piston 401 is movable in the direction of the axis xx which is that of the bore of the master cylinder in which it moves.
- the primary piston 401 consists of a body 41 1 externally provided with a skirt 412 to the diameter of the bore of the master cylinder.
- the rear side (AR) located on the right, is turned towards the push rod connected to the control member of the brakes, it is ie for example the brake pedal.
- the other side is the front side (AV). This orientation convention will be used in the present description.
- the body of the piston 41 1 thus forms a rear cavity 413 receiving for example the plunger, itself actuated by the push rod connected to the brake pedal, these various elements are not shown.
- the body delimits with the skirt, a portion of the primary chamber 414.
- This front cavity houses the return spring 402 which is based on the secondary piston not shown, which would be located on the left of the figure.
- This return spring 402 is provided with a telescopic guide 403 formed of a first sleeve 431 sliding in a second sleeve 432 and fixed to the bottom of the front cavity 414, the first sleeve 431 ends on the front side, by a collar of support 431 1 for the return spring 402 whose other end is pressed against the outer rim 4321 of the sleeve 432.
- the rear end of the first sleeve 431 is formed by two elastic branches 4312 terminated by a hook 4313 which hooks freely against the return 4322 of the front of the second 2
- the sleeve 432 delimiting the passage through which the first sleeve 431 passes.
- the two branches 4312 of the first sleeve 431 can move elastically closer so as to introduce this end into the sleeve 432 and then hook up behind the return.
- the sleeve 431 can slide in the sleeve 432 of large diameter depending on the compression of the return spring 402.
- This return spring 402 exerts no direct force on the primary piston but simply produces the extension of the small sleeve relative to the large sleeve.
- This primary piston which is fixed the guide carrying the return spring has a complex structure, both for the manufacture of each of the parts for assembly.
- the present invention aims to develop a primary piston of economic design.
- the subject of the invention is a tandem master cylinder primary piston of the type defined above, characterized in that the piston is made of plastic, and the guide of the return spring is formed of a retaining sleeve. provided with a flange for supporting the front of the return spring and a head rod, passing through the sleeve to be retained in extension by its head against the bottom of the sleeve, the rod being screwed to the bottom of the front cavity of the primary piston.
- This design of the primary piston is a particularly economical embodiment, both through the plastic structure of the body and the skirt of the primary piston and by the spring guide.
- the piston is made of a phenolic resin loaded with fibers.
- the piston thus produced has the advantage of having a coefficient of thermal expansion close to that of the aluminum of the body of the master cylinder.
- the body of the primary piston comprises in its axis a boss provided with a taut and the rear end of the head rod is provided with a thread 3
- the body of the primary piston comprises in its front cavity, a threaded end and the head rod has a rear end provided with a thread to screw on the threaded end.
- This solution also has the advantage of considerably simplifying the mounting of the piston.
- the bottom of the sleeve comprises a return delimiting a passage and the head rod has a circular head of diameter smaller than the inside diameter of the sleeve and greater than the passage of the bottom of the sleeve.
- the piston with the characteristics as defined above is a simple and economical embodiment. Its mounting is also easy and its operation is perfectly adapted to the master cylinder as the expansion coefficients are similar.
- FIG. 1 is a view in axial section of a primary piston according to the state of the art
- FIG. 2 is an axial section of a first embodiment of a primary piston according to the invention
- FIG. 2A is a sectional view of the first embodiment of the primary piston and the spring guide, detached from one another, but without showing the spring,
- FIG. 3 is a view in axial section of a second embodiment of a primary piston according to the invention.
- FIG. 3A is an axial sectional view of the second embodiment, the spring guide being detached from the piston, without the return spring, 4
- FIG. 4 is an enlarged view of the threaded end of the primary piston of FIG.
- FIG. 2 shows a first embodiment of a primary piston according to the invention.
- This piston 1 consists of a body 1 1 carrying a skirt 12 and defining a rear cavity 13 for receiving the plunger and the end of the push rod and a front cavity 14 defining the primary chamber and receiving the return spring 2 equipped with a spring guide 3 formed of a front sleeve 31 and a head rod 32 telescopically associated with the front sleeve 31.
- the head rod 32 has a thread 321 at its rear end to be screwed into the tapping 1 12 of an axial boss 1 1 1 protruding from the bottom of the front cavity 14.
- the front sleeve 31 is provided, on the front side, with an outer flange 31 1 and rear side, with a return or inner flange 312 delimiting an axial passage 313 traversed by the rod 32 whose head 322, at the opposite end of the threaded end, has a circular disc shape of section smaller than the inner section of the front sleeve 31 but substantially greater than the section of the passage 3 13 of the bottom of the sleeve so as to be retained by the return 312 in its extended position.
- the spring guide 3 is engaged in the return spring 2 which is supported by one end 21 against the bottom of the cavity 14 around the boss 1 1 1 to which is fixed the rear end of the rod 32 and its front end 22 rests against the front flange 33 of the sleeve 31.
- the front portion of the skirt 12 does not have a hydraulic liquid passage opening for filling the primary chamber when the primary piston is in the rest position as is known from generally for tandem master cylinders, but here, the front edge 121 of the skirt 12 has a thickness decrease 122 to create a free space relative to the bore of the master cylinder and thus allow the passage of the hydraulic fluid when the primary piston is in the rest position.
- Figure 2A is an axial sectional view of the primary piston and the guide of its return spring without showing the spring. 5
- Figure 3 shows a second embodiment of the tandem master cylinder primary piston according to the invention also shown in axial section. This second embodiment differs from the first embodiment mainly by assembling the spring guide 3A to the body 1 1A of the primary piston 1A.
- the spring guide 3A consists of two parts, a front sleeve 31A provided at the front of a flange 31 1A serving as a support for the front end 22A of the return spring 2 and receiving internally a 32A head rod retaining by the return 312A of the bottom of the sleeve bordering the passage 313A through which the head rod 32A whose head 322A is retained against this return inside the sleeve 31 A.
- This upper section rod 32A than that of the first embodiment has its rear end provided with an axial tapping 321A.
- the body 1a of the piston 1A comprises, in axial position, projecting from the bottom of the front cavity, a threaded end 1A 12A to screw the rear end of the head rod 32A on this threaded end and assemble the spring guide 3A to the piston 1A.
- the return spring 2A is supported by its end 22A against the outer flange 31 1A of the sleeve 31A and the other end 21 A, against the bottom of the front cavity 14A.
- Figure 3A shows an axial sectional view of the second embodiment of the primary piston and the guide of its return spring without the return spring.
- FIG. 4 shows the detail of the thread of the tip of FIG. 3.
- the primary piston is made of a phenolic resin loaded with fibers.
- This resin which is a thermosetting plastic material, has the advantage of a coefficient of expansion close to that of aluminum, the material in which the master cylinder is made. 6
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201480037587.1A CN105339223A (zh) | 2013-07-02 | 2014-06-23 | 主缸的主活塞 |
US14/902,767 US20160169386A1 (en) | 2013-07-02 | 2014-06-23 | Master cylinder primary piston |
DE112014003098.8T DE112014003098T5 (de) | 2013-07-02 | 2014-06-23 | Primarkolben eines Hauptzylinders |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1356428A FR3008054B1 (fr) | 2013-07-02 | 2013-07-02 | Piston primaire de maitre-cylindre |
FR1356428 | 2013-07-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015000730A1 true WO2015000730A1 (fr) | 2015-01-08 |
Family
ID=49151190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/063144 WO2015000730A1 (fr) | 2013-07-02 | 2014-06-23 | Piston primaire de maitre-cylindre |
Country Status (5)
Country | Link |
---|---|
US (1) | US20160169386A1 (fr) |
CN (1) | CN105339223A (fr) |
DE (1) | DE112014003098T5 (fr) |
FR (1) | FR3008054B1 (fr) |
WO (1) | WO2015000730A1 (fr) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08119089A (ja) * | 1994-10-24 | 1996-05-14 | Nabco Ltd | マスタシリンダ用ピストン |
JPH10258728A (ja) * | 1997-03-18 | 1998-09-29 | Nabco Ltd | 2重のシールリング構造のマスタシリンダ |
FR2770475A1 (fr) * | 1997-10-30 | 1999-05-07 | Bosch Syst Freinage | Maitre-cylindre a clapets a course morte reduite |
WO2002046010A1 (fr) * | 2000-12-06 | 2002-06-13 | Robert Bosch Gmbh | Piston de maitre-cylindre et dispositif de montage d'un clapet dans ce piston |
WO2005066005A1 (fr) * | 2004-01-09 | 2005-07-21 | Continental Teves Ag & Co. Ohg | Maitre-cylindre destine en particulier a un systeme de freinage regule |
WO2011138220A1 (fr) * | 2010-05-04 | 2011-11-10 | Continental Teves Ag & Co. Ohg | Maître-cylindre de système de freinage hydraulique de véhicule automobile |
WO2012079839A1 (fr) * | 2010-12-17 | 2012-06-21 | Robert Bosch Gmbh | Dispositif de ressort primaire de maître-cylindre tandem et maître-cylindre ainsi équipé |
FR2969084A1 (fr) * | 2010-12-21 | 2012-06-22 | Bosch Gmbh Robert | Piston secondaire de maitre-cylindre tandem et maitre-cylindre equipe d'un tel piston secondaire |
DE112011102282T5 (de) * | 2010-07-05 | 2013-06-27 | Toyota Jidosha Kabushiki Kaisha | Bremsgerät und Fahrzeug |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3837708A (en) * | 1973-11-02 | 1974-09-24 | D Donnell | Quick-connect wheel mounting means |
KR900006600B1 (ko) * | 1987-03-06 | 1990-09-10 | 닛신 고오교오 가부시끼가이샤 | 텐덤형 마스터 실린더 |
AU1353297A (en) * | 1995-12-20 | 1997-07-14 | Kelsey-Hayes Company | Master cylinder having radially formed end plugs and press-fit caged spring assembly pin |
US6490964B2 (en) * | 2000-01-24 | 2002-12-10 | Delphi Technologies, Inc. | Master brake cylinders having overmolded seals |
JP2003220941A (ja) * | 2002-01-30 | 2003-08-05 | Advics:Kk | マスタシリンダ |
JP2003341504A (ja) * | 2002-05-29 | 2003-12-03 | Advics:Kk | マスタシリンダ |
JP2003341503A (ja) * | 2002-05-29 | 2003-12-03 | Advics:Kk | マスタシリンダ |
JP4292813B2 (ja) * | 2003-01-29 | 2009-07-08 | 株式会社アドヴィックス | マスタシリンダ、該マスタシリンダ用シールリテーナ、及び該シールリテーナの装着方法 |
CN101239618A (zh) * | 2007-12-05 | 2008-08-13 | 臧福运 | 汽车液压制动器制动主缸 |
FR2939391B1 (fr) * | 2008-12-05 | 2010-11-19 | Bosch Gmbh Robert | Maitre-cylinde de frein |
FR2969087B1 (fr) * | 2010-12-21 | 2016-05-13 | Bosch Gmbh Robert | Piston primaire plastique a insert fonctionnel pour maitre-cylindre tandem a penetration et maitre-cylindre muni d'un tel piston |
-
2013
- 2013-07-02 FR FR1356428A patent/FR3008054B1/fr active Active
-
2014
- 2014-06-23 US US14/902,767 patent/US20160169386A1/en not_active Abandoned
- 2014-06-23 CN CN201480037587.1A patent/CN105339223A/zh active Pending
- 2014-06-23 WO PCT/EP2014/063144 patent/WO2015000730A1/fr active Application Filing
- 2014-06-23 DE DE112014003098.8T patent/DE112014003098T5/de active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08119089A (ja) * | 1994-10-24 | 1996-05-14 | Nabco Ltd | マスタシリンダ用ピストン |
JPH10258728A (ja) * | 1997-03-18 | 1998-09-29 | Nabco Ltd | 2重のシールリング構造のマスタシリンダ |
FR2770475A1 (fr) * | 1997-10-30 | 1999-05-07 | Bosch Syst Freinage | Maitre-cylindre a clapets a course morte reduite |
WO2002046010A1 (fr) * | 2000-12-06 | 2002-06-13 | Robert Bosch Gmbh | Piston de maitre-cylindre et dispositif de montage d'un clapet dans ce piston |
WO2005066005A1 (fr) * | 2004-01-09 | 2005-07-21 | Continental Teves Ag & Co. Ohg | Maitre-cylindre destine en particulier a un systeme de freinage regule |
WO2011138220A1 (fr) * | 2010-05-04 | 2011-11-10 | Continental Teves Ag & Co. Ohg | Maître-cylindre de système de freinage hydraulique de véhicule automobile |
DE112011102282T5 (de) * | 2010-07-05 | 2013-06-27 | Toyota Jidosha Kabushiki Kaisha | Bremsgerät und Fahrzeug |
WO2012079839A1 (fr) * | 2010-12-17 | 2012-06-21 | Robert Bosch Gmbh | Dispositif de ressort primaire de maître-cylindre tandem et maître-cylindre ainsi équipé |
FR2969084A1 (fr) * | 2010-12-21 | 2012-06-22 | Bosch Gmbh Robert | Piston secondaire de maitre-cylindre tandem et maitre-cylindre equipe d'un tel piston secondaire |
Also Published As
Publication number | Publication date |
---|---|
US20160169386A1 (en) | 2016-06-16 |
DE112014003098T5 (de) | 2016-05-04 |
FR3008054B1 (fr) | 2019-05-10 |
CN105339223A (zh) | 2016-02-17 |
FR3008054A1 (fr) | 2015-01-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2445767B1 (fr) | Systeme de freins a servofrein electrique | |
FR3037547B1 (fr) | Maitre-cylindre tandem equipe d'un commutateur de feux de stop | |
EP2655145B1 (fr) | Piston primaire plastique a insert fonctionnel pour maître-cylindre tandem a penetration et maître-cylindre muni d'un tel piston | |
FR3037548A1 (fr) | Maitre-cylindre tandem | |
WO2000050282A1 (fr) | Dispositif perfectionne de commande hydraulique d'un embrayage, notamment pour vehicule automobile | |
FR3007721A1 (fr) | Piston primaire de maitre-cylindre tandem | |
EP2655147B1 (fr) | Piston primaire plastique a insert pour maître-cylindre tandem a penetration et maître-cylindre muni d'un tel piston | |
EP0218510A1 (fr) | Servomoteur d'assistance au freinage | |
WO2015000730A1 (fr) | Piston primaire de maitre-cylindre | |
EP2655146B1 (fr) | Piston primaire plastique a insert fonctionnel en tôle emboutie pour maître cylindre tandem a pénétration et maître cylindre muni d'un tel piston | |
EP1102694B1 (fr) | Dispositif simplifie de commande hydraulique d'un embrayage, notamment pour vehicule automobile | |
EP2651728A1 (fr) | Dispositif de ressort primaire de maître-cylindre tandem et maître-cylindre ainsi équipé | |
FR2954421A1 (fr) | Carter pour un element a l'interieur d'une voie hydraulique | |
FR2998632A1 (fr) | Unite cylindre-piston | |
WO2014206830A2 (fr) | Servofrein électromécanique | |
FR2936581A1 (fr) | Valve pour amortisseur disposee entre une chambre inferieure et une chambre de compensation de l'amortisseur | |
FR2959286A1 (fr) | Agencement d'arret de gaine d'une commande a cable, notamment d'une commande de debrayage a cable, dans un vehicule automobile | |
FR2779496A1 (fr) | Dispositif de commande hydraulique d'un embrayage, notamment pour vehicule automobile | |
EP2826682B1 (fr) | Piston primaire de maître-cylindre tandem | |
FR2779499A1 (fr) | Dispositif de commande hydraulique d'un embrayage, notamment pour vehicule automobile, comportant un reservoir integre | |
FR2792688A1 (fr) | Cylindre hydraulique pour un dispositif de commande d'un embrayage de vehicule automobile | |
FR2996898A1 (fr) | Soupape d'une installation d'accumulation comportant un element de ressort | |
FR2696400A1 (fr) | Servomoteur d'assistance au freinage du type à dépression. | |
FR2917152A1 (fr) | Raccord de branchement hydraulique pour un systeme d'actionnement d'un embrayage de vehicule automobile | |
EP1958834A1 (fr) | Procédé de montage/démontage d'un maître-cylindre de frein |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201480037587.1 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14733142 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14902767 Country of ref document: US Ref document number: 112014003098 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14733142 Country of ref document: EP Kind code of ref document: A1 |