EP1711722A1 - Conception de frein a disque - Google Patents

Conception de frein a disque

Info

Publication number
EP1711722A1
EP1711722A1 EP05704754A EP05704754A EP1711722A1 EP 1711722 A1 EP1711722 A1 EP 1711722A1 EP 05704754 A EP05704754 A EP 05704754A EP 05704754 A EP05704754 A EP 05704754A EP 1711722 A1 EP1711722 A1 EP 1711722A1
Authority
EP
European Patent Office
Prior art keywords
brake
actuator
disc
lever
brake actuator
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Withdrawn
Application number
EP05704754A
Other languages
German (de)
English (en)
Inventor
Lars Severinsson
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.)
Haldex Brake Products AB
Original Assignee
Haldex Brake Products AB
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 Haldex Brake Products AB filed Critical Haldex Brake Products AB
Publication of EP1711722A1 publication Critical patent/EP1711722A1/fr
Withdrawn legal-status Critical Current

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
    • F16D65/00—Parts or details
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
    • F16D65/567—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting on a disc brake
    • 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
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc 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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F16D65/183—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with force-transmitting members arranged side by side acting on a spot type force-applying member
    • 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
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
    • F16D65/567—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting on a disc brake
    • F16D65/568—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting on a disc brake for synchronous adjustment of actuators arranged in parallel
    • 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
    • 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
    • F16D2123/00—Multiple operation forces
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
    • F16D2125/26—Cranks
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/56—Shafts for transmitting torque directly
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/58—Mechanical mechanisms transmitting linear movement
    • F16D2125/64—Levers

Definitions

  • the present invention concerns the design of a disc brake for vehicles and more specifically the placing of the brake actuator.
  • the invention is developed for heavy-duty vehicles, but a person skilled in the art realises that it may be used for any type of vehicle.
  • the caliper is either fixed or floating and the same goes for the brake disc(s) .
  • the caliper is fixed if the brake disc(s) are floating and vice versa.
  • both the caliper and the disc(s) are fixed.
  • one of the caliper and the disc(s) are fixed while the other part is semi-fixed.
  • This invention could be used with any combina- tion of fixed, semi-fixed or floating caliper or brake disc (s) .
  • the service brake actuator and a possible integrated parking brake actuator centrally in view of the brake disc or discs, and having the same general extension as the rotational axis of the brake disc(s).
  • the actuator is often placed somewhat higher than the rotational axis of the disc(s).
  • the available space for the brake and brake actuators is limited. In some cases there is not enough room for brakes of standard design and with the braking effects needed. Thus, there is a need to be able to adapt the design of the brake in view of the available space. Summary of the Invention In some trucks or the like the available space may not be enough to have the actuator (s) placed centrally in relation to the brake disc(s). However, sometimes there is free space to the side of the main part of the disc brake. In other cases it may be enough to turn the actuator to a position showing an angle to the rotational axis of the brake disc(s). Often it is turned to a vertical position.
  • the brake actuator may be placed displaced in relation to the rotational axis of the brake disc(s).
  • the displacement may be a lateral displacement and/or an angular displacement.
  • lateral displacement is in relation to the rotational axis of the brake disc(s) and correspond to a displacement forward or backward of the vehicle in which the brake is mounted.
  • Angular displacement as used in this description is also in relation to the rotational axis of the brake disc(s).
  • an actuator for a parking brake is integrated in the actuator for the service brake. In other examples the actuator for the parking brake is separated from the actuator for the service brake.
  • the actuator or actuators By placing the actuator or actuators laterally and/or angularly displaced from the rest of the brake it is possible to fit in a brake where it would be impossible with a brake of traditional design. In some embodiments it may be enough to displace only the parking brake actuator, while the service brake actuator remains in a traditional position. In still further embodiments it is possible to displace both the parking brake and service brake actuators and possibly in different positions in relation to the rotational axis of the brake disc.
  • the displacement of the actuator (s) is made possible in that the thrust units are operated by means of a common lever to which the actuator is attached. Normally the ac- tuator acts by means of the lever on thrust units. Said units act to get the brake pads and brake disc(s) into contact to accomplish a braking.
  • Fig. 1 is a schematic side and plan view of a first embodiment comprising the present invention
  • Figs. 2a and 2b are schematic side and plan views corresponding to Fig.
  • Fig. 1 of second and third embodiments comprising the present invention
  • Fig. 3 is schematic views corresponding to the previous Figs, of a fourth embodiment comprising the present invention
  • Fig. 4 is schematic views corresponding to the previous Figs, of a fifth embodiment comprising the present invention
  • Fig. 5 is a schematic side and plan view of a parking brake actuator comprising the present invention
  • Fig. 6 is a schematic side and plan view of a parking brake actuator comprising the present invention.
  • Fig. 1 The brake comprises a caliper 1 and at least one brake pad 3, placed on each side of a brake disc 2.
  • the brake pads 3 act in opposing directions on the brake disc 2.
  • both the caliper 1 and the brake disc 2 are fixed, i.e. they are not to slide in relation to each other.
  • An actuator 4 is furnished for the service brake and an actuator 5 for a parking brake is integrated in the actuator 4 for the service brake.
  • the actuator 4 for the service brake has a piston 6 attached to a lever 7.
  • the lever 7 is fixed to a mechanism housing 8 in such a way that the lever may be turned around a rotational axis 9.
  • the mechanism housing 8 receives the lever 7 and thrust units 10, 11. As shown here it is a distance between the caliper 1 and the mechanism housing 8.
  • the brake pads 3 are received on brackets 28 in the caliper 1, which brackets 28 will take up braking force from the pads 3.
  • the mechanism housing 8 and the caliper 1 are separate parts, but in other embodiments the caliper 1 and the mechanism housing 8 are integrated in one part. Even tough the mechanism housing 8 is shown as one unit, in other embodiments the part of the housing receiv- ing the actuator 4, 5 is a separate module. Such a separate module is then bolted to the rest of the housing and assists in taking up the braking force.
  • the modular form of the mechanism housing it is relatively easy to adapt the design of the brake to different vehicles.
  • four thrust units are attached to the lever 7. Said thrust units have the form of screw units 10, 11. Two of said screw units 10 acts to push the brake pad 3 on the same side of the disc 2 against the brake disc 2.
  • the other two screw units 11 acts on the brake pad 3 on the opposite side of the brake disc 2 by means of a pull beam 12.
  • the screw units 10, 11 are attached to the lever 7 in pivots 13, 14.
  • the part 15 of the lever 7 to which the screw units 10, 11 are attached has the form of a crankshaft.
  • the screw units 10, 11 are at- tached to the crankshaft 15 in such a way that they work in opposite directions.
  • the screw units 10 acting on the brake pad 11 on the same side of the disc 2 are acting in a pushing direction.
  • the screw units 11 acting on the brake pad 11 on the opposite side of the disc 2 are acting in a pulling direction by means of the pull beam 12.
  • the pivots 13 of the pulling screw units 11 are attached to a crank of the lever 7 placed on the opposite side of the rotational axis 9 compared to the actuator 4.
  • the pivots 14 of the pushing screw units 10 are placed on the same side of the rotational axis 9 as the actuator 4.
  • the crankshaft 15 of the lever 7 is journaled in two bearings 16, 17, one at each end.
  • the bearings 16, 17 are received in walls of the mechanism housing 8.
  • the rotational axis 9 of the crankshaft 15 is aligned with the bearings 16, 17. If needed, further bearings (not shown) are placed at different positions along the crankshaft 15.
  • an adjusting mechanism 18 is connected to one screw unit 10, to adjust the position of the brake pads 3 due to the wear of the brake pads 11.
  • a synchronisation device 19 connected to the screw units 10, 11 is used to synchronise the movements of the screw units 10, 11 during adjustment.
  • the synchronisation device 19 may be of the type having a chain, belt or gear transmission or a common shaft, mainly parallel with the brake disc 2 and having bevelled or worm gears to respective screw unit 10, 11.
  • the brake actuator 4, 5 is placed laterally displaced in relation to the main part of the brake.
  • the actuator 4, 5 is attached to an extended, lateral part of the crank- shaft 15 of the lever 7.
  • the shown orientation of the brake actuator 4, 5 is only one example, a person skilled in the art realises that the actuator 4, 5 may have any orientation along a full circle.
  • the length of the extended part of the crankshaft 15 may also vary, depending on where it is possible to place the brake actuator 4, 5.
  • Both the brake disc 2 and the caliper 1 are of the fixed type in this case.
  • the parking brake actuator 5 is integrated in the service brake actuator 4 and acts directly on the service brake actuator 4, in a manner known to a person skilled in the art.
  • the embodiments of Figs. 2a and 2b corresponds to the embodiment of Fig. 1 except in that in braking the brake force is only acting directly on the brake pad 3 on one side of the brake disc 2.
  • the only difference between the embodiments of Figs. 2a and 2b is which screw units 10, 11 that are connected to the crankshaft part 15 of the lever 7. In these embodiments either the caliper 1 or the brake disc 2 is fixed while the other part is semi-fixed, i.e.
  • the position of the brake pads 3 on both sides of the brake disc 2 is adjusted in relation to the brake disc 2 and in respect of the wear of the pads 3.
  • the screw units 11 acting on the brake pad 3 on the opposite side of the brake disc 2 are attached to the lever 7.
  • the elasticity of the caliper 1, the brake disc 2 and/or the mounting of said parts is such, that the brake force acting on the brake pad 3 on one side of the brake disc 2, will make the brake disc 2 to go into contact with the other brake pad 3. This is made easier by the pads 3 being mounted on the brackets 28 and that the caliper 1 is separated from the mechanism housing 8.
  • the laterally displaced actuator 4, 5 is used for a brake having a fixed caliper 1 and a floating brake disc 2.
  • screw units 10 are only placed to act directly on the closest brake pad 3.
  • the closest brake pad 3 will be pressed against the brake disc 2, which is pressed against the brake pad 3 on the opposite side of the brake disc 2.
  • the adjustment mechanism 18 keeps a correct distance between the brake pads 3 and the brake disc 2 regarding wear of the brake pads 3.
  • the laterally displaced actuator 4, 5 is used in a brake having a fixed brake disc 2 and a floating caliper 1. In this case the caliper 1 will slide during braking when the screw units 10 act directly on the brake pad 3 on the same side of the brake disc 2.
  • the parking brake actuator 5 is separated from the service brake actuator 4.
  • the service brake actuator 4 has a traditional central position, while the parking brake actuator 5 has a laterally displaced position.
  • both the service brake actuator 4 and the parking brake actuator 5 may be laterally displaced, possibly to different lateral positions. It is also possible to have both actuators 4, 5 at the same laterally displaced position but at different angles .
  • the parking brake actuator 5 has a separate mechanism received in a parking brake mechanism housing 24.
  • a piston 20 of the actuator 5 acts on a lever 21, which lever 21 is journaled in bearings 26, 27 giving the lever 21 a rotational axis 23.
  • the bearings 26, 27 are received in walls of the parking brake mechanism housing 24.
  • the lever 21 has a part resembling a crankshaft 25.
  • Each screw unit 10 is attached to the crankshaft 25 by means of an arm 29 and a pivot 22.
  • the pivots 22 are placed on a crank on the same side of the rotational axis 23 as the actuator 5.
  • the crankshaft 25 is extended to make it possible to laterally displace the parking brake actuator 5.
  • the parking brake is applied in that the motion of the piston 20 of the actuator 5 is transferred to the screw units 10 by means of the crankshaft 25 and the arm 29.
  • the parking brake actuator 5 is acting on the same lever 7 as the service brake actuator in spite being placed in different positions.
  • the lever 7 has a further part attached to the piston 20 of the parking brake actuator 5.
  • the further part to which the piston 20 is attached is fixed to an extended part of the crankshaft 15.
  • the screw units 10 are attached to the crankshaft 15 by means of pivots 14.
  • Said pivots 14 are placed on the same side of the rotational axis 9 as the service brake actuator 4.
  • a separated parking brake actuator 5 may be used for any of the embodiments shown in the Figs. 1-4.
  • the shown embodiments are only examples of use of the present invention and a person skilled in the art realises that it may be used with many different types of brakes. Thus, the exact design of the brakes is of no importance for the use of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un frein à disque pour véhicules. Ledit frein comprend un ou plusieurs disques de frein (2), une ou plusieurs garnitures de frein (3) placées sur chaque face du(des) disque(s) de frein (2) et au moins un actionneur de frein (4, 5). Ledit actionneur de frein (4, 5) agit sur des unités de poussée (10, 11) à l'aide d'au moins un levier (7, 21). L'actionneur de frein (4, 5) (au moins au nombre de un) est déplacé par rapport à l'axe rotationnel du(des) disque(s) de frein (2). Ce déplacement peut être latéral ou angulaire par rapport à l'axe rotationnel.
EP05704754A 2004-01-28 2005-01-26 Conception de frein a disque Withdrawn EP1711722A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400162A SE0400162D0 (sv) 2004-01-28 2004-01-28 Disc Brake Design
PCT/SE2005/000083 WO2005073586A1 (fr) 2004-01-28 2005-01-26 Conception de frein a disque

Publications (1)

Publication Number Publication Date
EP1711722A1 true EP1711722A1 (fr) 2006-10-18

Family

ID=31493122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05704754A Withdrawn EP1711722A1 (fr) 2004-01-28 2005-01-26 Conception de frein a disque

Country Status (3)

Country Link
EP (1) EP1711722A1 (fr)
SE (1) SE0400162D0 (fr)
WO (1) WO2005073586A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015114440B4 (de) * 2015-08-31 2021-09-30 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Scheibenbremse mit Synchronisationseinheit
EP4180686A1 (fr) * 2021-11-12 2023-05-17 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Ensemble frein, actionneur de piston pour un tel ensemble frein et véhicule équipé d'un tel ensemble frein
EP4180684A1 (fr) * 2021-11-12 2023-05-17 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Ensemble d'actionnement d'élément de freinage, ensemble frein et véhicule

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1030881A (fr) * 1975-04-02 1978-05-09 Donald D. Johannesen Frein a disque a commande mecanique
US4544045A (en) * 1983-04-01 1985-10-01 Allied Corporation Mechanical actuator for a disc brake
GB8622617D0 (en) * 1986-09-19 1986-10-22 Lucas Ind Plc Disc brakes
GB9928162D0 (en) * 1999-11-30 2000-01-26 Federal Mogul Brake Syst Ltd Spot type disc brake with parking brake function
US6698553B2 (en) * 2002-03-27 2004-03-02 Meritor Heavy Vehicle Technology, Llc Disc brake chamber adapter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005073586A1 *

Also Published As

Publication number Publication date
WO2005073586A1 (fr) 2005-08-11
SE0400162D0 (sv) 2004-01-28

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