EP1882111A1 - Frein a disque - Google Patents

Frein a disque

Info

Publication number
EP1882111A1
EP1882111A1 EP06753719A EP06753719A EP1882111A1 EP 1882111 A1 EP1882111 A1 EP 1882111A1 EP 06753719 A EP06753719 A EP 06753719A EP 06753719 A EP06753719 A EP 06753719A EP 1882111 A1 EP1882111 A1 EP 1882111A1
Authority
EP
European Patent Office
Prior art keywords
brake
disc
contact surface
caliper
disk
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Withdrawn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
EP06753719A
Other languages
German (de)
English (en)
Inventor
Eugen Kloos
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.)
Wabco Radbremsen GmbH
Original Assignee
Wabco Radbremsen 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
Application filed by Wabco Radbremsen GmbH filed Critical Wabco Radbremsen GmbH
Publication of EP1882111A1 publication Critical patent/EP1882111A1/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Withdrawn legal-status Critical Current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
    • F16D65/02—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
    • 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
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0016—Brake calipers
    • 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
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0045—Braking members arranged non-symmetrically with respect to the brake disc

Definitions

  • the invention relates to a disc brake with
  • a brake disc having a rotation axis and a preferred direction of travel
  • a caliper with a first caliper limb located on a first side of the brake disc and a second caliper limb lying on a second side of the brake disc opposite to the first side, the second caliper limb being displaced by a predetermined distance in the direction of the first caliper limb
  • Brake disk outlet side is offset, a first brake pad, which abuts when braking with a first back surface on a first contact surface on the application device and with a first friction surface on the brake disc, and
  • a second brake pad which abuts when braking with a second back surface on a second contact surface on the second saddle leg and with a second friction surface on the brake disc and which is supported via a third contact surface in the circumferential direction of the brake disc on the second caliper limb.
  • a brake pad carrier back plate
  • friction material mounted thereon.
  • the brake pads have a relatively long Warrek- kung with a correspondingly large contact surface or friction surface, a correspondingly large contact surface or contact surface is conventionally provided on the reaction-side caliper leg to allow uniform pressing of the pad against the brake disc.
  • the contact surfaces in known brakes substantially correspond to the surface of the back plate. They are symme- formed on the caliper leg and symmetrically arranged to the back plate on the saddle leg.
  • both brake pads are made as equal as possible and arranged on both sides of the brake disc so that they face each other symmetrically. They are guided and supported in shafts of the brake disc engaging around the brake carrier in both lateral directions and radially inwardly. In this case, occur during the braking process with system of the brake pad on the brake disc in the direction of rotation of the brake disc brake forces / tangential forces, which are partially absorbed by the brake carrier and partly by the reaction surface of the local saddle leg as frictional force between the back plate and the saddle bearing surface (frictional force in tangential direction) ,
  • EP 405 778 A1 discloses a disc brake is known in which the saddle legs and thus the brake pads are not offset from each other.
  • the rim-side brake pad is not supported on the rim side caliper leg, but rather on the brake carrier. Therefore, the rim-side caliper leg performs a radial outward movement during the braking process. In contrast, it performs a radial inward movement when the rim-side brake pad is not supported on the brake carrier, but rather on the rim-side saddle leg.
  • the caliper widens when braking, with partial overloads to be compensated by different elasticities / requirements (main claim) of the two "fingers" of the rim-side saddle leg.
  • the brake caliper behaves quite differently with disc brakes of the type mentioned at the beginning, in which the application-side brake lining can be guided and supported in a brake carrier, but in which the reaction-side / rim-side brake pad is supported directly on the local caliper limb, and in which case the rim side saddle leg is offset from the application side saddle leg by a predetermined distance in the direction of the brake disc outlet side.
  • the invention is therefore based on the object to overcome the above-mentioned disadvantages and in particular PreßGermanlastept on the rim-side brake pad and Hit- zeriß Struktur on the brake disc to avoid or at least reduce.
  • this object is achieved in that the second back surface seen in the direction of the axis of rotation in a radially outward and on the Bremsschei- ben exit side area over the second contact surface protrudes.
  • a "free space" is created between the second (rim-side) caliper leg and the second (rim-side) brake pad in the critical zone, in which the brake pad can escape.
  • the second back surface projects beyond the second contact surface in a region located radially on the outside and on the brake disk inlet side.
  • the projecting region on the brake disk inlet side is preferably larger than the projecting region on the brake disk outlet side. This creates a favorable geometry for the overall behavior. It is expressly pointed out that the projecting area on the brake disk inlet side can also go to zero or shrink to an irrelevant in terms of mechanics rest.
  • This design ensures the avoidance of overloads (increased wear, heat cracks, etc.) even when reversing.
  • the second saddle leg in the region of the projection of the second back surface on the second contact surface with respect to the second contact surface springs back. In other words, it is stepped. This configuration opens up the possibility of executing the first and the second brake pad the same, thereby avoiding confusion.
  • the second brake pad springs back in the area of the projection of the second back surface via the second contact surface with respect to the second back surface.
  • the second saddle leg is employed to form the supernatant of the second back surface over the second abutment surface with respect to the second abutment surface.
  • the invention also covers a solution in which the above-mentioned "free space" is wedge-shaped.
  • a delimitation of the region of the projection of the second back surface via the second contact surface with the third contact surface at an angle of 5 ° to 60 °, preferably 15 ° to 45 °, more preferably 25 ° to 35 ° includes.
  • the second contact surface is rotated relative to the first contact surface.
  • the second abutment surface is pivoted relative to the first abutment surface about the axis of rotation of the brake disk. This corresponds to an embodiment in which both saddle legs have the same radial distance from the axis of rotation of the brake disc despite offset.
  • a connecting device for connecting the first caliper limb to the second caliper limb is provided which, at least in that region in which it engages over the brake disc, is radially closer to the brake disc on the brake disc outlet side than on the brake disc inlet side.
  • the caliper can transfer high application forces without expansion without loss and can move in the predetermined range of elasticity during braking in the direction of the preferred disc rotation without the risk of a collision with the brake disc or a wheel rim surrounding the brake.
  • the disc brake according to the invention is preferably a sliding caliper brake or a fixed caliper brake.
  • the disc brake is a two-spindle brake.
  • the invention is preferably applicable to a commercial vehicle brake.
  • the invention also provides a caliper for a
  • the invention also provides a brake pad for a disc brake of the type described above.
  • FIG. 2 shows a top view of the brake according to FIG. 1
  • Figures 3 to 5 are perspective views of the caliper of
  • FIG. 6 shows a view of the rim-side saddle leg of the rim seen from the brake disk
  • FIG. 7 shows a view, viewed from the brake disk, of the rim-side brake lining, installed in the rim-side caliper limb
  • FIG. 8 shows a combination of FIGS. 6 and 7
  • FIG. 9 shows a schematic plan view of a conventional disk brake
  • FIG. 10 shows a schematic plan view of the disk brake according to FIGS. 1 and 2,
  • FIG. 11 shows an alternative embodiment of the brake pad according to FIG. 7.
  • the brake shown in the drawing includes a brake carrier 10 which is fixed to a vehicle and which carries a sliding caliper 12. Furthermore, the brake shown an operation-side brake pad 14 and a rim-side brake pad 16. The two brake pads 14, 16 are held by a hold-down bracket 18 in position.
  • the brake pad 14 has a friction surface 20 for engagement with a brake disk 22.
  • the brake pad 16 has a friction surface 24 for engagement with the brake disk 22.
  • the rim-side brake disk 16 has a friction surface 24 opposite back surface 26, with which they on a contact surface 28 of a rim side Leg 30 of the saddle 12 is applied.
  • An actuation-side saddle leg is designated by the reference numeral 32.
  • the brake pad 14 has a friction surface 20 opposite back surface, which is not visible in the drawing. With this back surface, it bears against a corresponding surface of a tensioning or actuating device, also not shown.
  • the rim-side saddle leg 30 is offset / rotated with respect to the actuation-side saddle leg 32 in the direction of a disc outlet side by a distance V.
  • the rim-side brake pad 16 is supported by two contact surfaces 34, 36 in the circumferential direction on lugs 38, 40 of the rim-side saddle leg 30.
  • the clearance S1 is substantially triangular, because the designated in Figure 8 by the reference numeral 42 part of its boundary with the contact surface 36 forms an acute angle ⁇ . In the embodiment shown in the drawing, the angle ⁇ measures 28 °.
  • Figure 9 which shows a schematic plan view of a conventional disc brake, makes it clear that in such a conventional disc brake there is no clearance corresponding to the clearances S1 and S2. Therefore, in the conventional disc brake, the rim-side pad may not dodge according to the forces generated by the caliper widening. These forces are those forces that are indicated by the arrows 44 and 46 in Figures 1 and 2. They occur when at a given direction of rotation D of the brake disc 22 is braked (corresponding to a forward drive).
  • the clearance S2 serves the same purpose as the clearance S1, but not in forward but in reverse.
  • the clearance S1 is greater than the clearance S2.
  • the concrete design is the result of extensive field tests and calculations and depends inter alia on the brake size, the friction lining quality and the back plate thickness.
  • the contour of the free spaces in the illustrated embodiment is optimal for a backplate thickness of 9 mm. This applies in particular to the angle ⁇ .
  • the space S2 can also be omitted or shrink to a mechanically no longer relevant rest.
  • the rim-side caliper limb projects back relative to the contact surface 28 in order to form the free spaces S1 and S2. Additionally or alternatively, however, can also be provided that the contact surface 26 of the rim-side brake pad 16 springs back to form such a space.
  • the hatched area 48 indicates a region of reduced thickness of the back plate.
  • the upper limit of the free space S1 in FIG. 10 or lower in FIG. 10 may also be employed with respect to the respective other boundary so that the overall result is a wedge-shaped free space in the illustration according to FIG.
  • the two saddle legs 30 and 32 are connected by a saddle bridge 12.1, 12.2.
  • the axis of rotation of the brake disc is designated by the letter A.

Landscapes

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

Abstract

L'invention concerne un frein à disque comportant un disque de frein (22) avec un axe de rotation (A) et un sens de rotation (1) préféré, un dispositif d'application de course, un étrier de frein (12) présentant une première branche d'étrier (32) située sur un premier côté du disque de frein et une seconde branche d'étrier (30) située sur un second côté du disque de frein, opposé au premier côté. La seconde branche d'étrier est décalée par rapport à la première branche d'étrier, d'une distance (V) prédéterminée, en direction de la face de sortie du disque de frein. Ledit frein à disque comprend également une première garniture de frein (14), qui repose, lors du freinage, par une première face arrière, sur une première surface d'appui, sur le dispositif d'application de course et par une première surface de friction (20), sur le disque de frein, ainsi qu'une seconde garniture de frein (16), qui repose, lors du freinage, par une seconde surface arrière (26), sur une deuxième surface d'appui (28), sur la seconde branche d'étrier et par une seconde surface de friction (24), sur le disque de frein et qui est soutenue sur la seconde branche d'étrier dans le sens périphérique du disque de frein, par l'intermédiaire d'une troisième surface d'appui (36). Selon l'invention, il est prévu que, vue dans le sens de l'axe de rotation, la seconde surface arrière dépasse la seconde surface d'appui, dans la zone située à l'extérieur dans le sens radial et sur la face de sortie du disque.
EP06753719A 2005-05-19 2006-05-18 Frein a disque Withdrawn EP1882111A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005023116A DE102005023116A1 (de) 2005-05-19 2005-05-19 Scheibenbremse
PCT/EP2006/004737 WO2006122813A1 (fr) 2005-05-19 2006-05-18 Frein a disque

Publications (1)

Publication Number Publication Date
EP1882111A1 true EP1882111A1 (fr) 2008-01-30

Family

ID=36685972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06753719A Withdrawn EP1882111A1 (fr) 2005-05-19 2006-05-18 Frein a disque

Country Status (4)

Country Link
US (1) US20080314697A1 (fr)
EP (1) EP1882111A1 (fr)
DE (1) DE102005023116A1 (fr)
WO (1) WO2006122813A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007057992A1 (de) * 2007-12-03 2009-06-04 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Scheibenbremse, insbesondere Schiebesattel-Scheibenbremse sowie Bremsbelag für eine Scheibenbremse
GB0911016D0 (en) 2009-06-25 2009-08-12 Airbus Operations Ltd Electrical power transmitting telescopic strut
DE102011115213A1 (de) * 2011-09-28 2013-03-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Scheibenbremse, insbesondere für ein Nutzfahrzeug, sowie Bremsbelag für eine Scheibenbremse

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB811525A (en) * 1956-08-07 1959-04-08 Automotive Prod Co Ltd Improvements in or relating to fluid pressure operated disc brakes
GB890647A (en) * 1957-06-29 1962-03-07 Girling Ltd Improvements relating to disc brakes for vehicles
GB1066442A (en) * 1963-03-15 1967-04-26 Dunlop Rubber Co Improvements in disc brakes
US3332521A (en) * 1965-08-11 1967-07-25 Bendix Corp Closed loop type disc brake
GB1277223A (en) * 1969-09-25 1972-06-07 Girling Ltd Improvements in spot-type disc brakes
JPS5736835Y2 (fr) * 1976-06-23 1982-08-13
JPS557464U (fr) * 1978-06-28 1980-01-18
FR2556802B1 (fr) * 1983-12-15 1986-04-25 Dba Ensemble patin et support de couple pour frein a disque
GB2234023A (en) * 1989-06-27 1991-01-23 Gen Motors France Disc brake caliper housing
DE9414032U1 (de) * 1994-08-30 1994-10-20 Lucas Industries P.L.C., Solihull, West Midlands Schwimmsattel-Teilbelagscheibenbremse
JPH0932870A (ja) * 1995-07-24 1997-02-04 Toyota Motor Corp ディスクブレーキ装置
DE19701398A1 (de) * 1997-01-17 1998-07-23 Teves Gmbh Alfred Bremssattel
DE10241157A1 (de) * 2002-09-05 2004-03-25 Wabco Perrot Bremsen Gmbh Scheibenbremse
SE526098C2 (sv) * 2003-09-25 2005-07-05 Haldex Brake Prod Ab Skivbroms med självförstärkande effekt
DE102004009123B4 (de) * 2004-03-01 2007-06-14 Wabco Radbremsen Gmbh Scheibenbremse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006122813A1 *

Also Published As

Publication number Publication date
WO2006122813A1 (fr) 2006-11-23
DE102005023116A1 (de) 2006-11-23
US20080314697A1 (en) 2008-12-25

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