EP1527289A2 - Frein a disque comportant une piece de pression - Google Patents

Frein a disque comportant une piece de pression

Info

Publication number
EP1527289A2
EP1527289A2 EP03766276A EP03766276A EP1527289A2 EP 1527289 A2 EP1527289 A2 EP 1527289A2 EP 03766276 A EP03766276 A EP 03766276A EP 03766276 A EP03766276 A EP 03766276A EP 1527289 A2 EP1527289 A2 EP 1527289A2
Authority
EP
European Patent Office
Prior art keywords
disc brake
brake
connecting plate
brake according
adjusting
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Withdrawn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
EP03766276A
Other languages
German (de)
English (en)
Inventor
Dieter Bieker
Johann Baumgartner
Robert Trimpe
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
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
Priority claimed from DE10258749.3A external-priority patent/DE10258749B4/de
Application filed by Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of EP1527289A2 publication Critical patent/EP1527289A2/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Withdrawn legal-status Critical Current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
    • 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
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
    • F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
    • F16D65/0979—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on the rear side of the pad or an element affixed thereto, e.g. spring clips securing the pad to the brake piston or caliper
    • 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
    • F16D2065/386—Slack adjusters driven electrically
    • 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
    • F16D65/78—Features relating to cooling
    • F16D2065/785—Heat insulation or reflection
    • 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

Definitions

  • the present invention relates to a pneumatically and / or electromotively actuated disc brake according to the preamble of claim 1.
  • Disc brakes are known, for example, as sliding caliper disc brakes, swivel caliper disc brakes or fixed caliper disc brakes.
  • Sliding calipers require an axially fixed component that carries the brake pads that are effective on one side of the brake disc and absorbs their circumferential forces when the brake is actuated, as well as holding the brake caliper that is displaceable parallel to the vehicle axis.
  • the relative movement that the brake caliper performs against the axially fixed component can be divided into the working and wear stroke.
  • At least one adjusting device is arranged in the brake caliper, which acts on a brake pad via one or two thrust pieces which can be displaced essentially axially to the brake disk in order to adjust the distance between the brake pad and the brake disk.
  • the adjustment devices provided on both sides of the brake disc have adjustment sleeves that can be rotated, for example, as adjustment elements by an electric motor or by another mechanism via a gearbox, which have an internal thread into which a bolt-like extension of the respectively assigned pressure piece is screwed, so that a relative axial rotation is achieved by appropriate rotation There is movement between the adjusting sleeves and the pressure pieces.
  • a reverse arrangement is also known, in which the pressure pieces have a sleeve-like extension which can be rotated on a bolt forming the adjusting element.
  • the brake lining material is directly connected to the lining carrier, which in turn is either connected to the pressure piece or, without connection to the lining carrier, bears on the lining carrier "loosely".
  • a disadvantage of the known constructions is that the frictional heat generated during a braking process is passed unhindered through all the components of the adjusting device, whereby the downstream functional parts are exposed to a special load which reduces the service life. This is particularly problematic when electric motors are used as drives for the adjusting devices.
  • the present invention is therefore based on the object of further developing a disc brake of the generic type in such a way that, with structurally small measures, on the one hand less heat transfer during braking into the interior of the brake caliper and / or a structurally simple type of securing the adjusting elements and their correspondence elements against rotation is achieved.
  • the two adjusting elements of the at least one adjusting device are secured against rotation in their area facing the respective brake pad on a common connecting plate and / or on the connecting plate and / or on the pressure piece on the side facing the respective brake pad a one-part or multi-part heat-insulating layer is attached at least in regions.
  • the connecting plate as an anti-rotation lock not only offers considerable manufacturing and assembly advantages due to its simple construction, but also functional advantages, since the connecting plate always remains in the same position on the pressure pieces, i.e. the connecting plate moves with them in accordance with the axial adjustment of the pressure pieces.
  • the connecting plate is preferably designed as a heat protection plate, which is dimensioned such that it largely covers the opening of an installation space in the brake caliper, in which the adjusting device is placed.
  • the opening can be closed with a further cover plate which is screwed to the opening of the brake caliper and is therefore not axially movable and has openings for the pressure elements.
  • the heat-insulating layer is particularly preferably formed in one or more parts and applied directly to the connecting plate.
  • One or two ceramic plates can be provided as the layer, which are over the pressure piece protrude beyond the largest cross-sectional dimension, this ceramic plate being fastened to the connecting plate, which acts as heat protection and as a means of preventing rotation for the two pressure pieces of an adjusting device, and which is connected to the pressure pieces in a positive and / or non-positive manner.
  • a pressure piece plate which forms the pressure piece and which carries the heat-insulating layer is placed on the connecting plate.
  • a ceramic coating to a pressure plate.
  • the connecting plate is clamped by the pressure plate.
  • the pressure plate is preferably held in a form-fitting manner axially and non-rotatably on the connecting plate.
  • the pressure plate has recesses free of material contact with the connecting plate.
  • the connecting plate again has protuberances in the connection area with the adjusting elements towards the brake lining, in which the adjusting elements are fixed axially and secured against rotation in a simple manner.
  • the cylindrical protuberance has shaped latching lugs in its jacket area, which are formed as latching grooves on the inside of the protuberance and which correspond on the outside with latching grooves of the pressure plate and on the inside with lugs of the adjusting element and, in particular, permit simple months of these components.
  • the region of the adjusting element that lies in the protuberance has slots that break through material on the casing side.
  • the pressure plate can also be provided with openings which are arranged next to one another, for example, running radially, and which bring about heat insulation in this area. In each of these cases, the pressure plate and the pressure plate are non-rotatably connected to the connecting plate.
  • bellows can be connected to the connecting plate, which protectively cover the respective adjusting elements.
  • the pressure pieces and the brake pads are each connected to one another in such a way that - always and in a simple manner - the brake pads are retracted when the adjusting elements are turned back and the brake is released ,
  • one or more leaf springs are arranged on the pressure piece or a component of the adjusting element connected to it, which springs engage behind a web in a recess in the lining carrier.
  • one or more leaf springs can be arranged on the lining carrier, which engage behind the pressure piece or a component of the adjusting element connected to it.
  • Figure 1 is a schematically shown disc brake in a section
  • FIG. 2 shows a partially sectioned top view of the disc brake
  • FIG. 3 shows a detail of the disc brake in a front view
  • FIG. 4 shows the detail according to FIG. 3 in a top view
  • FIG. 5 shows a section through the detail according to FIG. 3 along the line V-V in FIG. 3,
  • FIG. 6 shows another exemplary embodiment of a detail of a disc brake according to the invention in an exploded view
  • Figure 7 shows a section through the detail of Figure 6 along the line
  • FIG. 8 shows a section through a caliper section of a further disc brake.
  • FIGS. 1 and 2 show a pneumatically actuated disc brake which has a brake caliper 1 designed as a fixed caliper, which comprises a brake disc 2 in the upper peripheral region.
  • a brake caliper 1 designed as a fixed caliper, which comprises a brake disc 2 in the upper peripheral region.
  • An electromotive actuation of the disc brake is also conceivable, but not shown.
  • brake pads 3, 4 are arranged in their direction and away from it, ie perpendicular to their plane, which in the usual way consist of a pad carrier 3a, 4a and a pad material 3b, 4b applied thereon.
  • the brake caliper 1 is fastened to an axle flange 22 of the disc brake in the lower right section 21 in FIG. 1, which extends in the direction of a wheel axle (not shown).
  • the brake disc 2 is designed here, for example, as a sliding disc, which is displaceable relative to the brake caliper 1 on the wheel axis by the amount of the working stroke to be overcome during braking.
  • the brake caliper 1 could also be designed to be displaceable or pivotable. It would also be conceivable that the brake caliper 1 and / or the brake disc 2 are each designed to be elastically deformable by part of the path of the working stroke.
  • an adjustment system 5, 6 is provided. This comprises 2 adjustment devices 7, 8 on both sides of the brake disc to compensate for the air play or the brake lining wear that occurs during braking.
  • the adjusting devices 7, 8 here consist on each side of the brake disc 2, for example, from at least one or more, preferably two adjusting sleeves 19, 20, in which bolt-like projections 38, 39 of pressure pieces 11, 12 which act as adjusting elements 9, 10 are rotatably mounted, that a relative axial mobility between the adjusting sleeves 19, 20 and the pressure pieces 11, 12 is given.
  • the adjusting sleeve 20 arranged on the side of the brake disk 2 opposite the rotary lever 23 is supported directly on the inside of the brake caliper.
  • the two adjusting elements 9, 10 belonging to the respective adjusting system 5 or 6, which run parallel and at a distance and can be moved axially back and forth in the direction of the brake disk 2, are on both sides the brake disc in each case by a yoke-like connecting plate 15 or 16, which can also be formed as a sheet - connected to one another in such a way that they are held against rotation relative to one another.
  • the connecting plates 15, 16 are each directly or indirectly with a continuous or only locally attached - e.g. circular-shaped - heat-insulating layer 13, 14, which prevents friction heat generated during braking from being conducted to further, subordinate functional parts.
  • the connecting plates 15 and 16 act here as pressure pieces 11, 12 in cooperation with the heat-insulating layers 13, 14, e.g. made of ceramic.
  • the connecting plates 15, 16 serve in addition to the support and anti-rotation of the adjusting devices 7, 8 also as a shield of the underlying functional parts (for example, the electric motors M) against heat radiation, since they are in Completely or largely close the brake caliper formed openings to the brake disc, as is indicated schematically in FIG. 1.
  • the torsion-proof fastening of the pressure pieces 11, 12 and thus the adjuster elements 9, 10 enables their common axial displacement and thus advancement of the brake linings 3, 4, the adjuster sleeve 19, 20 being formed when the adjuster elements 9, 10 are designed as threaded bolts rotates, while with a design of the adjusting elements 9, 10 as a threaded sleeve, the correspondingly designed bolt can rotate therein.
  • FIGS. 3-5 show an exemplary embodiment of the connecting plate 15 with a heat-insulating layer 13 connected or attached to it in each case in two parts. Layer 13 forms the actual pressure contact surface towards the brake lining.
  • the connecting plate 15 is shaped and dimensioned such that it largely covers the front of a receptacle of the brake caliper 1 (FIG. 1) in which the respective adjustment system 5, 6 is placed.
  • the heat-insulating layer 13 consists of two plates or disks, for example made of ceramic, which are embedded in the connecting plate 15 and fastened there.
  • the pressure piece 11 is covered up to an area partially covering the adjusting element 9 by a bellows 17, which is attached to the connecting plate 15 on the side facing away from the heat-insulating layer 13.
  • the bellows 17 is fastened on its side facing the connecting plate 15 with an inner collar 45 on the drain element 9 and with an outer collar 46 on the connecting plate 15, which enables the assembly and compensation of radial movements between these components.
  • the rather plate-like connecting plate 15 has a corrugated fold 34, approximately in the middle region, by means of which heat-related changes in length are compensated for.
  • the connecting plate 15 for receiving pressure plate 38 each has a protuberance 28, which is provided with a closed bottom, in which the facing end region of the pressure plate 38 lies.
  • This protuberance 28 is provided with shaped areas which, towards the outside, result in locking lugs 29 which are arranged radially on the outer surface of the protuberance 28 and which on the inside form a locking groove into which lugs 31 of the adjusting element 9 engage, as a result of which the aforementioned anti-rotation device is produced.
  • radially extending slots 32 are provided on the lateral surface, which also form thermal insulation like openings 33 which are provided on a molded collar 35 of the pressure piece 11 and run radially.
  • FIG. 7 it can be seen that the end region of the pressure piece 11 lying in the protuberance has an undercut 36 on the shell side.
  • a pressure piece plate 26 is pressed onto the protuberance 28, through which the jacket region of the protuberance 28 is pressed into the undercut 36 of the adjusting element 9, with a corresponding shaping of the pressure piece plate 26 resting in this area on the jacket surface of the protuberance 28 ,
  • the pressure plate 26 is provided with radially extending recesses 27, in which also serve for thermal insulation or an interruption of the heat transfer.
  • locking grooves 30 are introduced, which correspond to the locking lugs 29 of the protuberance 28 and thus form an anti-rotation device for the pressure plate 26.
  • the heat-insulating layer 13 is applied to the ring area of the pressure plate 26, specifically on the side facing the brake lining 3, 4.
  • Fig. 8 illustrates that one or more leaf springs 42 are attached to the pressure piece 11, 12 or another component on the adjusting element 9, 10 on both sides of the brake disc 2, each of which engages behind a web 43 in a recess 44 of the lining carrier.
  • the pressure pieces 11, 12 and the lining carrier 3b, 4b are connected to each other in such a way that retraction of the brake linings 3, 4 is ensured when the adjusting elements 9, 10 are turned back and the brake is released.
  • the arrangement can also be the other way around, that is, that the spring is molded onto the lining carrier and engages in a recess on the adjusting element 9, 10 or pressure piece 11, 12.
  • the principle of FIG. 8 can also be applied to the variants of FIGS. 1 to 7. LIST OF REFERENCE NUMBERS

Landscapes

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

Abstract

L'invention concerne un frein à disque conçu pour un véhicule utilitaire et pouvant être actionné pneumatiquement et/ou au moyen d'un électromoteur. Ce frein à disque comprend un étrier de frein (1), un dispositif d'actionnement de frein ainsi qu'au moins un dispositif d'ajustage disposé dans l'étrier de frein (1). Cette invention est caractérisée en ce que les deux éléments d'ajustage (9, 10) du/des dispositif(s) d'ajustage (7, 8) sont fixés, au niveau de leur zone orientée vers la garniture de frein respective, sur une plaque de jonction commune (15, 16), de façon à être bloqués en rotation, et/ou en ce qu'une couche thermoisolante (13, 14) à un ou plusieurs composants est appliquée sur ladite plaque de jonction (15, 16) ou sur des éléments reliés à cette dernière, sur au moins une partie de la face orientée vers la garniture de frein (3, 4) associée, pour former une zone servant de pièce de pression.
EP03766276A 2002-07-29 2003-07-24 Frein a disque comportant une piece de pression Withdrawn EP1527289A2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10234641 2002-07-29
DE10234641 2002-07-29
DE10258749.3A DE10258749B4 (de) 2002-07-29 2002-12-16 Scheibenbremse mit Druckstück
DE10258749 2002-12-16
PCT/EP2003/008119 WO2004013510A2 (fr) 2002-07-29 2003-07-24 Frein a disque comportant une piece de pression

Publications (1)

Publication Number Publication Date
EP1527289A2 true EP1527289A2 (fr) 2005-05-04

Family

ID=31496736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03766276A Withdrawn EP1527289A2 (fr) 2002-07-29 2003-07-24 Frein a disque comportant une piece de pression

Country Status (6)

Country Link
US (1) US7367433B2 (fr)
EP (1) EP1527289A2 (fr)
JP (1) JP2006501413A (fr)
AU (1) AU2003266240A1 (fr)
BR (1) BR0312964A (fr)
WO (1) WO2004013510A2 (fr)

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See references of WO2004013510A2 *

Also Published As

Publication number Publication date
WO2004013510A3 (fr) 2004-05-06
AU2003266240A8 (en) 2004-02-23
US7367433B2 (en) 2008-05-06
BR0312964A (pt) 2005-06-14
WO2004013510A2 (fr) 2004-02-12
JP2006501413A (ja) 2006-01-12
AU2003266240A1 (en) 2004-02-23
US20060124405A1 (en) 2006-06-15

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