WO2000009908A1 - Actionneur de frein à disque - Google Patents

Actionneur de frein à disque Download PDF

Info

Publication number
WO2000009908A1
WO2000009908A1 PCT/GB1999/002650 GB9902650W WO0009908A1 WO 2000009908 A1 WO2000009908 A1 WO 2000009908A1 GB 9902650 W GB9902650 W GB 9902650W WO 0009908 A1 WO0009908 A1 WO 0009908A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
restraint
force transmission
thrust
brake
Prior art date
Application number
PCT/GB1999/002650
Other languages
English (en)
Inventor
Carl Heinlein
Original Assignee
Meritor Heavy Vehicle Braking Systems (Uk) Limited
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 Meritor Heavy Vehicle Braking Systems (Uk) Limited filed Critical Meritor Heavy Vehicle Braking Systems (Uk) Limited
Priority to AU53793/99A priority Critical patent/AU5379399A/en
Publication of WO2000009908A1 publication Critical patent/WO2000009908A1/fr

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
    • F16D65/14—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
    • F16D2121/14—Mechanical
    • 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
    • F16D2125/28—Cams; Levers with cams
    • F16D2125/32—Cams; Levers with cams acting on one cam follower

Definitions

  • This invention relates to an actuator device for a disc brake, primarily for a motor vehicle, the device including an actuator, usually of the rotary type, a thrust element through which actuating force is applied from the actuator to a force transmission device in order to move a friction element of the brake, in use, into engagement with a rotary brake disc.
  • the invention also embraces a disc brake incorporating such an actuator device.
  • One such device is in the form of an extensible adjuster strut having a pair of threadedly interengaged parts, one of which is held against rotation so that rotation of the other causes the length of the strut to vary. It can also be advantageous to restrain an associated thrust element, usually in the form of a cylindrical roller arranged between the actuator and the non-rotary strut part, from moving in translation longitudinally of its axis.
  • an actuator device for a disc brake comprises an actuator, a thrust element through which actuating force is applied from the actuator to a force transmission device in order to move a friction element of the brake, in use, into engagement with a rotary brake disc, and a restraint device acting both to restrain a part of the force transmission device against rotation and to provide translational restraint of the thrust element.
  • the restraint device is held against rotation by engagement with the thrust element and forms a non-rotary connection with said part of the force transmission device.
  • the restraint device is held against rotation by engagement with fixed structure.
  • actuating force is transmitted from the actuator through a pair of transmission devices arranged in side by side parallel relationship, the restraint device extending between the force transmission devices and engaging respective parts of said devices in such a manner as to restrain both said devices against rotation, the restraint device also serving to provide translational restraint of a pair of thrust elements associated respectively with the force transmission devices.
  • Figure 1 is an end view of one form of the disc brake of the invention
  • Figure 2 is a view from above, partly in cross-section, of part of the brake of Figure 1 ;
  • Figure 3 is a side view, partly in cross-section, of the brake shown in Figures 1 and 2, and
  • Figure 4 is an enlarged view of a component of the brake of Figures 1 to 3.
  • the disc brake illustrated therein has a fixed carrier on which are supported a pair of friction pads, of which one is illustrated and designated 2, disposed respectively at either side of a brake disc (not shown).
  • the carrier serves to mount the brake on a vehicle and to absorb torque sustained by the pads during a braking operation.
  • a clamp member or caliper 3 straddles the brake disc, in conventional manner, and is mounted on the carrier so as to be slidable axial ly of the brake disc relative to the carrier by way of pins 4.
  • the caliper 3 carries an integral housing 5 which is adapted to mount a conventional air or other power actuator (not shown) on an external face 6 thereof.
  • the housing 5 defines a chamber 7 within which a pivotal brake actuating lever 8 may perform an angular reciprocal swinging movement, as indicated by the arrows in Figure 3, under the action of a thrust member (not shown) of the power actuator.
  • the thrust member With the power actuator mounted on the face 6, the thrust member extends through an opening 9 of the housing 5 into engagement with a recess 10 of the lever 8, the lever being integral with or attached to a rotary actuating member 11 which is rotatably supported within the caliper by way of a pair of needle bearing assemblies 12.
  • the member 1 1 is recessed to house respective cylindrical rollers 13, 14, the axes of which are offset from the rotary axis of the actuating member 1 1 and form an eccentric actuating arrangement with the rollers 13, 14 bearing against respective thrust members 15A, 16A of adjacent thrust assemblies shown as adjustable tappet assemblies indicated generally at 15 and 16.
  • Rotation of the lever 8 and its connected actuating member 1 1 causes actuating thrust to be applied via the rollers 13, 14 and tappet assemblies 15,16 to the directly actuated friction element 2 and, by reaction via the caliper 3, to the indirectly actuated friction element (not shown).
  • An adjuster assembly is indicated generally at 17 and may be of any appropriate conventional type needing no detailed description for the purpose of this invention.
  • the adjuster responds to excessive movement of the friction elements and produces resultant rotation of an adjuster shaft 18 which, via an output gear 19 rotates a pair of input gears 20, which are drivingly associated respectively with the adjustable tappet assemblies 15, 16.
  • the tappet assemblies 15, 16 are of identical construction and operation and a full understanding of the invention may be obtained from a description of only the assembly 15.
  • This assembly has an outer sleeve 22 which is internally threaded at 22A and receives a hollow internal shaft 23 having an externally threaded portion 23A extending over a part of its length adjacent the thrust member 15A, for cooperation with the internal thread 22A of the sleeve 22.
  • the sleeve 22 and shaft 23 together form an adjuster strut of variable length.
  • the shaft 23 is provided, at its end adjacent the friction element 2, with a tappet head 24 which is releasably coupled to the shaft by a circlip 24A so as, conveniently, to be freely rotatable relative to the shaft.
  • the thrust member 15A which is engaged over the adjacent end of the sleeve 22, is provided with an elongate stem 25 of non-circular cross-section which extends within the hollow shaft 23, the internal surface of which forms a complementary bore. As shown in Figure 4, the stem 25 is provided with opposed flat surfaces 25A for engagement with corresponding surfaces within the hollow shaft 23 to lock the shaft and sleeve against relative rotation.
  • the thrust member 15A is provided with at least one pair of opposed flat surfaces 15B for cooperation with restraint means, illustrated as a plate 26 which is provided with a central opening 27 through which extends the adjuster shaft 18.
  • the opening may be a through hole within which the shaft is completely surrounded.
  • the opening may be in the form of a recess, e.g. generally of U-shape, within which the shaft is received and only partially surrounded.
  • the plate 26 is provided with two further holes shaped and sized to surround the periphery of the thrust members 15A,16A, each further hole having opposed flat internal sides which engage the surfaces 15B on the sides of the respective thrust members.
  • the holes of the restraint means may each have only a single flat internal side to engage a side surface 15B of each thrust member. Restraining the thrust member 15A against rotation locks the shaft 23 rotationally via the stem 25. End portions 28 of the plate 26 are turned at right angles to the plane of the plate and engage the respective ends of the rollers 13, 14 to prevent translational movement of the rollers and thereby maintain them in position within the actuating member 13.
  • the arrangement of the invention incorporates a simple and convenient restraint means which has the dual function of preventing rotation of the inner shaft 23 and retaining the rollers 13, 14 in position within the actuating member 13.
  • the disc brake described has a pair of thrust assemblies of which parts are locked by a single restraint means, it would be possible to use respective individual restraint means for the two assemblies, or a single restraint means may be used when only a single thrust assembly is employed.
  • the cooperating portions of the restraint means and thrust members which provide anti-rotational restraint may have shapes and structures other than those described above for achieving said restraint.
  • the periphery of each thrust member may be formed with one or more slots, splines or similar formations for engagement by corresponding projecting formations on the restraint means.
  • engagement of the portions 28 with the end of the cooperating roller 13 may act to lock the restraint device against rotation and thereby lock the thrust member 15A of the transmission assembly and, via the stem 25, the internal shaft 23.

Landscapes

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

Abstract

L'invention concerne un dispositif d'actionneur pour frein à disque comportant un actionneur, un élément (15A, 16A) de poussée par lequel la force d'actionnement est appliquée de l'actionneur à un dispositif (15, 16) de transmission de force afin de déplacer un élément de frottement du frein, à l'utilisation, pour que celui-ci entre en contact avec un disque de frein rotatif; et un dispositif (26) de retenue agissant à la fois pour limiter la rotation d'une partie (23) du dispositif (15, 16) de transmission de force et pour assurer une retenue du mouvement de translation de l'élément (15A, 16A) de poussée.
PCT/GB1999/002650 1998-08-14 1999-08-12 Actionneur de frein à disque WO2000009908A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53793/99A AU5379399A (en) 1998-08-14 1999-08-12 Disc brake actuator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9817624.1 1998-08-14
GBGB9817624.1A GB9817624D0 (en) 1998-08-14 1998-08-14 Disk brake actuator

Publications (1)

Publication Number Publication Date
WO2000009908A1 true WO2000009908A1 (fr) 2000-02-24

Family

ID=10837180

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/002650 WO2000009908A1 (fr) 1998-08-14 1999-08-12 Actionneur de frein à disque

Country Status (3)

Country Link
AU (1) AU5379399A (fr)
GB (1) GB9817624D0 (fr)
WO (1) WO2000009908A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1354146A1 (fr) * 2001-01-25 2003-10-22 Haldex Brake Products AB Frein a disque modulaire
WO2006058784A1 (fr) * 2004-12-03 2006-06-08 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Frein a disques pour un vehicule a moteur
DE102005034739A1 (de) * 2005-07-21 2007-02-08 Schaeffler Kg Lagerung eines schwenkbaren Hebels

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997001045A1 (fr) * 1995-06-20 1997-01-09 Lucas Industries Public Limited Company Frein a disque
WO1997022814A1 (fr) * 1995-12-20 1997-06-26 Lucas Industries Plc Freins a disques modulaire et levier d'actionnement pour ledit frein
DE29606804U1 (de) * 1996-04-15 1997-08-07 Lucas Industries plc, Solihull, West Midlands, B91 3TX Betätigungsvorrichtung für eine Scheibenbremse, Verdrehsicherungselement und Scheibenbremse mit einer derartigen Betätigungsvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997001045A1 (fr) * 1995-06-20 1997-01-09 Lucas Industries Public Limited Company Frein a disque
WO1997022814A1 (fr) * 1995-12-20 1997-06-26 Lucas Industries Plc Freins a disques modulaire et levier d'actionnement pour ledit frein
DE29606804U1 (de) * 1996-04-15 1997-08-07 Lucas Industries plc, Solihull, West Midlands, B91 3TX Betätigungsvorrichtung für eine Scheibenbremse, Verdrehsicherungselement und Scheibenbremse mit einer derartigen Betätigungsvorrichtung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1354146A1 (fr) * 2001-01-25 2003-10-22 Haldex Brake Products AB Frein a disque modulaire
US7175005B2 (en) 2001-01-25 2007-02-13 Haldex Brake Products Ab Modular disc brake
WO2006058784A1 (fr) * 2004-12-03 2006-06-08 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Frein a disques pour un vehicule a moteur
DE102005034739A1 (de) * 2005-07-21 2007-02-08 Schaeffler Kg Lagerung eines schwenkbaren Hebels

Also Published As

Publication number Publication date
AU5379399A (en) 2000-03-06
GB9817624D0 (en) 1998-10-07

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