EP3123055A2 - Système de freins a disques humide - Google Patents
Système de freins a disques humideInfo
- Publication number
- EP3123055A2 EP3123055A2 EP15715791.8A EP15715791A EP3123055A2 EP 3123055 A2 EP3123055 A2 EP 3123055A2 EP 15715791 A EP15715791 A EP 15715791A EP 3123055 A2 EP3123055 A2 EP 3123055A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- action
- chamber
- discs
- hydraulic fluid
- 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- Withdrawn
Links
Classifications
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
- F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
- F16D55/36—Brakes with a plurality of rotating discs all lying side by side
- F16D55/38—Brakes with a plurality of rotating discs all lying side by side mechanically actuated
-
- 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
- B60T13/12—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 liquid
- B60T13/22—Brakes applied by springs or weights and released hydraulically
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
- F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/72—Slack adjusters hydraulic
- F16D65/74—Slack adjusters hydraulic self-acting in one direction
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D2065/383—Slack adjusters for adjusting the spring force in spring-applied brakes
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
- F16D2121/06—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure for releasing a normally applied brake
Definitions
- the invention relates to the field of wet disc brakes, more particularly used on construction machines.
- This wet disc braking system is intended to meet the standards in force, such as for example the standard NF EN ISO 3450 or any other equivalent standard.
- Wet disc brakes are nowadays well known. They implement a plurality of disks parallel to each other. Under the action of a piston in a direction perpendicular to the plane in which the discs fit, the latter come into contact with each other, generating a friction force capable of inducing the slowing down and stopping of the rotary member, and in particular the wheel of a vehicle, with which they are associated.
- braking using such wet brake systems is operated by default. In other words, without external action, the vehicle is kept at a standstill, and a positive action of the user must be exerted to allow the vehicle to move.
- this braking system comprises a plurality of disks 1, mounted parallel to each other and respectively secured to a rotary member 8 and a fixed member 7 relative to the vehicle frame. These disks are subjected to the action of a piston 2, movable in translation in a direction perpendicular to the plane in which they are inscribed.
- a spring system 3 bearing on another fixed element 5 with respect to the chassis of the vehicle, is received in a housing provided for this purpose in the piston 2, and exerts a force of stress against said piston, which in turn induces the braking of the rotary member 8.
- FIG. 2 thus shows the action of the hydraulic fluid within the chamber 6 inducing the translation of the piston 2 in the direction of the fixed element 5 with respect to the chassis, and the compression of the spring system 3, thus releasing the friction action of the discs and, as a corollary, the possibility for the vehicle to move.
- the respective positioning of the piston 2 and of the spring system 3 is thus shown in broken lines.
- the object of the present invention is therefore to overcome these drawbacks and in particular to avoid over-sizing of the various members forming part of the constitution of such a brake, and to guarantee constant braking performance as and when required. the wear of the brake linings.
- the invention aims a wet disk brake system comprising a set of disks respectively secured to a rotary member and fixed relative to the chassis of the vehicle on which it is mounted, these disks being subjected to the action of a piston, able to exert a pressure on the disks in the direction of the rotary member, said piston being itself even subject constantly to the action of a spring system supported on a fixed element relative to the vehicle chassis and whose action is neutralized by a hydraulic fluid received for this purpose in a chamber defined between another fixed element relative to the frame and a shoulder formed in said piston, and powered by a source of hydraulic pressure.
- the brake system further comprises a second piston, mounted in an antagonistic manner with respect to the first piston, and receiving the end of the spring system opposite to that bearing against the first piston, this second piston being capable of to move in translation in the same direction as said first piston and towards the latter under the action of a hydraulic fluid generated by the same hydraulic pressure source or by a second source of hydraulic pressure.
- the invention aims to maintain substantially constant the force generated by the spring system on the first actuating piston on the discs, as and when the wear thereof.
- this piston is no longer degraded by the wear of the discs and there is a constant and constant braking, at least in terms of efficiency, during the life of the vehicle on which the system braking is mounted.
- FIGS. 1 to 3 represent a wet disk brake system according to the prior art.
- Figure 4 is a schematic representation illustrating a braking system according to the invention before any wear, and actuated by default.
- Figure 5 is a view similar to Figure 4 in the braking mode disabled.
- Figure 6 is a schematic representation of the braking system of the invention, after wear and actuated by default.
- Figure 7 is a view similar to Figure 6 with actuation of the piston to release the brake.
- FIG. 8 is a view similar to Figure 7 at the end of actuation of said piston.
- FIG. 9 illustrates the braking system of the invention, still in the wear configuration of the discs, with braking reactivated and conservation of the braking power.
- FIG. 4 is a diagrammatic view of the essential elements of the wet brake system according to the invention.
- the braking system is activated.
- the piston 2 exerts a pressure on the various discs 1 by means of a spring system, of which only one of them 3 has been shown.
- a spring system is constituted by a revolution system, typically comprising a plurality of springs arranged at 360 °.
- this spring system does not rest directly on the fixed element 5 relative to the chassis, but via a second piston 4, movable in translation relative to the chassis, according to the direction the action force of the spring.
- this second piston 4 is capable of being subjected to the action of a hydraulic fluid, received in a chamber 9 formed between a shoulder of said piston 4 and the fixed element 5 with respect to the frame, such that the 4 can be used to receive the hydraulic fluid under pressure by means of a pump, not shown, supplying the fluid via a pipe 10 closed by a ball valve 11, or by a pilot valve.
- both the clearance chamber 6 of the piston 2 that 9 of translation of the second piston 4 are depressurized, and further, said second piston 4 is supported on the fixed element 5 relative to the frame ( Figure 4).
- the hydraulic fluid is introduced into the clearance chamber 6, and into the chamber 9 (see Figure 5). Due to the stiffness constant of the spring 3 on the one hand, and the unused state of the discs, the hydraulic pressure in the chamber 9 is insufficient to induce the displacement of the second piston 4, so that it remains in contact with the fixed element 5 relative to the frame.
- the hydraulic pressure in the clearance chamber 6 induces the displacement of the piston 2 in the direction of the fixed element 5 relative to the chassis, and consequently, the release of the discs 1 then allowing the vehicle to progress.
- the second piston 4 moves slightly in the direction of the disks, deviating in fact from the fixed element 5 relative to the frame, until it leads to the balance with the initial load resulting from the characteristics of the spring.
- the hydraulic fluid introduced into the disengagement chamber 6 induces the displacement of the piston 2 in the direction of the fixed element 5 with respect to the chassis, thus releasing the disks.
- the second piston 4 is maintained in a position offset from the fixed element 5 with respect to the chassis, because of the volume of the hydraulic fluid in the chamber 9 and consequently the presence of the ratchet. ball 11, which opposes the return of the hydraulic fluid at the source of hydraulic pressure.
- the supply of hydraulic fluid into the disengagement chamber 6 continues, thereby inducing the displacement of the piston 2 in the direction of the fixed element 5 with respect to the chassis, (FIG. 8), thus making it possible to release the disks and to the vehicle to progress.
- the reactivation of the brakes is obtained by depressurizing the chamber 6, thereby allowing the piston 2 to move towards the discs under the action of the spring 3.
- the hydraulic fluid contained in the chamber 9, maintained at this level because of the ball valve 11, makes it possible to keep the second piston 4 out of the fixed element 5 with respect to the chassis, and thus keep substantially constant the action of said spring 3 against the piston 2, and thus the braking itself.
- O-rings 12 of traditional invoice, and intended to seal the two chambers 6 and 9 vis-à-vis any leakage of hydraulic fluid.
- the clearance chamber 6 of the piston 2 also becomes smaller in volume, since the force required to overcome the action of said piston 2 itself becomes smaller, due to the reduction in the mechanical characteristics of the spring system acting on said piston, decrease made possible by the relative displacement of the point of application of the springs belonging to the spring system by the presence of the second piston 4.
- the present invention ensures constant braking performance as wear of the brake disk stack linings.
- the vehicle equipped with such brakes therefore has optimal braking characteristics from the first moments of use and until the end of its life. In fact, we no longer go through the three states braking systems of the prior art, namely oversizing, optimal sizing and undersizing resulting from progressive wear of the liners.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1452612A FR3019245B1 (fr) | 2014-03-27 | 2014-03-27 | Systeme de freins a disques humide |
| PCT/FR2015/050665 WO2015145028A2 (fr) | 2014-03-27 | 2015-03-18 | Système de freins a disques humide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3123055A2 true EP3123055A2 (fr) | 2017-02-01 |
Family
ID=51168080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15715791.8A Withdrawn EP3123055A2 (fr) | 2014-03-27 | 2015-03-18 | Système de freins a disques humide |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3123055A2 (fr) |
| FR (1) | FR3019245B1 (fr) |
| WO (1) | WO2015145028A2 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10075416B2 (en) | 2015-12-30 | 2018-09-11 | Juniper Networks, Inc. | Network session data sharing |
| US11619274B2 (en) * | 2020-12-15 | 2023-04-04 | Caterpillar Inc. | Dual brake slack adjuster and systems, components, and methods thereof |
| CN113483039A (zh) * | 2021-07-16 | 2021-10-08 | 安徽合力股份有限公司 | 一种湿式制动器 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH446827A (de) * | 1965-03-24 | 1967-11-15 | Bergische Stahlindustrie | Durch Federkraft wirkende und hydraulisch gelüftete Reibungsbremse, insbesondere Scheibenbremse, mit automatischer stufenloser Bremsbelagnachstellung |
| DE2510760C3 (de) * | 1975-03-12 | 1981-12-17 | L. Schuler GmbH, 7320 Göppingen | Durch Druckmittel lüftbare Federdruckbremse |
| DE2549007C3 (de) * | 1975-11-03 | 1984-09-20 | Fritz Kork KG, 2400 Lübeck | Federspeicher-Scheibenbremse, insbesondere für Schienenfahrzeuge |
| JPS58191329A (ja) * | 1982-04-30 | 1983-11-08 | Akebono Brake Ind Co Ltd | ネガテイブ型ウエツトデイスクブレ−キ |
| DE3425346C2 (de) * | 1984-07-10 | 1986-12-18 | Maschinenfabrik Stromag Gmbh, 4750 Unna | Reibungskupplung- oder bremse |
| DE102008044220A1 (de) * | 2008-12-01 | 2010-06-10 | Deere & Company, Moline | Getriebe |
-
2014
- 2014-03-27 FR FR1452612A patent/FR3019245B1/fr not_active Expired - Fee Related
-
2015
- 2015-03-18 WO PCT/FR2015/050665 patent/WO2015145028A2/fr not_active Ceased
- 2015-03-18 EP EP15715791.8A patent/EP3123055A2/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015145028A2 (fr) | 2015-10-01 |
| FR3019245B1 (fr) | 2016-03-11 |
| FR3019245A1 (fr) | 2015-10-02 |
| WO2015145028A3 (fr) | 2015-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FR2996268A1 (fr) | Appareil hydraulique presentant une structure amelioree pour sa mise en cylindree. | |
| FR2958986A1 (fr) | Frein multiplicateur d'effort | |
| EP3123055A2 (fr) | Système de freins a disques humide | |
| FR3024516A1 (fr) | Reducteur de couple | |
| EP0143709B1 (fr) | Système de freinage comprenant au moins un disque de frein coulissant | |
| FR2923279A1 (fr) | Amortisseur de vibrations pour frein a disques. | |
| FR3030645B1 (fr) | Appareil hydraulique a pistons radiaux | |
| WO1990001123A1 (fr) | Dispositif de commande d'embrayage | |
| EP3087286A2 (fr) | Frein à disque comportant un frein de stationnement à actionnement hydraulique | |
| EP0197826A1 (fr) | Frein à disque à réglage automatique | |
| FR2942013A1 (fr) | Dispositif de freinage a disque a attenuation du couple residuel. | |
| EP1900960A1 (fr) | Patin de frein comportant un réservoir de graisse | |
| EP1367285A1 (fr) | Frein à disque, notamment our usage industriel | |
| FR2478243A1 (fr) | Frein a disque a etrier coulissant | |
| EP3666610B1 (fr) | Dispositif d'actionnement d'un système de freinage ferroviaire et véhicule ferroviaire pourvu d'un tel dispositif d'actionnement | |
| FR3029875A1 (fr) | Element elastique de compensation pour frein de vehicule, etrier de frein a disque, et procede d'assemblage | |
| EP3087288B1 (fr) | Frein à disque à commande hydraulique comportant un frein de stationnement à actionnement hydraulique | |
| EP1847434B1 (fr) | Frein automatique de stationnement | |
| FR2950121A1 (fr) | Dispositif de controle de recul pour plaquettes de frein et frein muni d'un tel dispositif. | |
| FR3045734A1 (fr) | Machine hydraulique a pistons radiaux comprenant un ressort d'activation d'embrayage | |
| FR2926769A1 (fr) | Maitre-cylindre pour servomoteur d'assistance pneumatique au freinage et servomoteur d'assistance pneumatique au freinage muni d'un tel maitre-cylindre | |
| FR3034153A1 (fr) | Moyeu a roue libre avec dispositif de reduction de bruit | |
| FR2917040A1 (fr) | Dispositif de limitation de recul des pistons d'etrier de frein dans un systeme de freinage a disque hydraulique | |
| EP3087289B1 (fr) | Frein à disque perfectionné comportant un frein de stationnement à actionnement hydraulique | |
| EP3087287B1 (fr) | Frein à disque comportant un frein de stationnement à actionnement hydraulique et un groupe de rattrapage d'usure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| 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 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20160902 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| 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: 20200401 |