WO2009070198A2 - Frein à disque - Google Patents

Frein à disque Download PDF

Info

Publication number
WO2009070198A2
WO2009070198A2 PCT/US2008/012520 US2008012520W WO2009070198A2 WO 2009070198 A2 WO2009070198 A2 WO 2009070198A2 US 2008012520 W US2008012520 W US 2008012520W WO 2009070198 A2 WO2009070198 A2 WO 2009070198A2
Authority
WO
WIPO (PCT)
Prior art keywords
piston
friction member
rotor
actuation
disc brake
Prior art date
Application number
PCT/US2008/012520
Other languages
English (en)
Other versions
WO2009070198A3 (fr
Inventor
William Eugene Sherman Ii
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009070198A2 publication Critical patent/WO2009070198A2/fr
Publication of WO2009070198A3 publication Critical patent/WO2009070198A3/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
    • 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
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/06—Pistons
    • 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
    • F16D2127/00—Auxiliary mechanisms
    • F16D2127/02—Release mechanisms
    • 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
    • F16D2129/00—Type of operation source for auxiliary mechanisms
    • F16D2129/06—Electric or magnetic
    • F16D2129/065—Permanent magnets

Definitions

  • This invention relates to a retraction arrangement wherein first and second friction members in a disc brake are magnetically moved away from a rotor to define a running clearance after each brake application.
  • Disc brakes have spaced apart first and second rails that extend from a support member that is fixed to a frame of a vehicle guide to align and position first and second friction members with respect to a rotor of which the structure in the following U.S. Patents 4,200,173 and 6,454,056 may be considered as representative of the prior art.
  • first and second guide pins are fixed to a caliper and extend through ears on the support member with the guide pins being retained in corresponding first and second bores in the support member such that they are parallel with the first and second rails.
  • a piston located in a bore of the caliper is connected to the first friction member and when pressurized fluid is presented to the bore, a force is created that pushes the piston toward the caliper while pulling the caliper toward the rotor to bring pads on the first and second friction members into engagement with the rotor and effect a brake application.
  • a retraction seal acts on and moves the piston and caliper such that the pads on the first and second friction members are moved away from the rotor to define a running clearance.
  • a primary object of the present invention is to provide a disc brake with a retraction arrangement whereby the friction pads are magnetically attached and moved as the result of a seal positioning an actuation piston to define equal running clearances after each brake application for first and second friction members on opposite sides of a rotor.
  • the disc brake assembly has a support member that is secured to a vehicle.
  • a caliper retained in the support member has an actuation section that is connected by a bridge to an arm.
  • the actuation section has an actuation bore therein for retaining a piston to define an actuation chamber.
  • a first friction member is connected to the piston and aligned with a first braking surface on a rotor associated with a wheel on the vehicle.
  • a second friction member is connected to the arm and aligned with a second braking surface on the rotor.
  • the actuation chamber on being presented pressurized fluid from a source acts on the piston to develop an actuation force that moves the piston and a pad on first friction member toward and into engagement with the first braking surface and acts on the actuation section such that the caliper moves a pad on the second friction member into engagement with the second braking surface to effect a brake application.
  • a retraction arrangement that includes magnetic members moves the first and second friction members away from the rotor to define a first running clearance between the first pad and the first braking surface and a second running clearance between the second pad and the second braking surface.
  • An advantage of the disc brake in this invention resides in a plurality of magnetic members that move with a retraction arrangement to position pads associated with first and second friction members a same distance away from a rotor after each brake application.
  • a further advantage of this disc brake resides in a retraction arrangement that includes magnetic members whereby a first friction member and a second friction member are concurrently moved away from a rotor to define equilateral running clearances after each brake application in retraction of the pads.
  • Figure 1 is a perspective view of a disc brake having been made according to the principals of the present invention.
  • Figure 2 is a sectional view of the disc brake of Figure I in a rest position taken along lines 2-2;
  • Figure 3 is a sectional view of the disc brake of Figure 1 taken along lines 3-3;
  • Figure 4 is a sectional view of the disc brake of Figure 3 taken along line 4-4;
  • Figure 5 is a sectional view of a second embodiment of a piston and magnetic member.
  • the disc brake 10 shown in Figures 1 , 2 and 3 is distinguished from disc brakes of the prior art such as U.S. Patent 4,200,173 by a magnetic retraction arrangement 70, 70' of the present invention whereby first 30 and second 32 friction members are moved away from a rotor 34 to assist in defining first and second running clearances after each brake application.
  • the anchor 12 is defined by a base 35 that is fixed to the housing 14 of a vehicle by bolts 15 (only one is shown) to position spaced apart first 36 and second 38 rails thereon along perpendicular planes with respect to rotor 34.
  • An ear 29a on a backing plate 29 of a first friction member 30 and ear 31a on backing plate 31 of a second friction member 32 are respectively located on the first rail 36 while ear 29b on backing plate 29 of the first friction member 30 and ear 31b on backing plate 31 of the second friction member 32 are respectively located on the second rail 38 such that face 3Of on the first friction member 30 and face 32f on the second friction member 32 are respective located in parallel alignment with face 34a and 34b on rotor 34.
  • the anchor or support 12 receives an integral caliper 16 of disc brake 10 such that an actuation section 18 is connected by a bridge 22 to arms 20, 20' that straddles the rotor 34.
  • the actuation section 18 has a bore 24 therein for retention of a piston 26 to define an actuation chamber 28.
  • the first friction member 30 is connected to piston 26 while the second friction member 32 is connected to arms 20,20' to respectively locate the first 30 and second 32 friction members adjacent to the first braking face 34a and the second braking face 34b of the rotor 34 which is connected to rotate with an axle of the vehicle.
  • the alignment of the caliper 16 on the support member 12 is achieved by a first guide pin 42 that is connected to an ear 44 that extends from the actuation section 18 and is mounted to slide in a first bore 46 in the support member 12 and a second guide pin 48 that is connected to an ear 50 that extends from the actuation section 18 and mounted to slide in a second bore 52 in the support member 12.
  • the first 46 and second 52 bores are spaced apart, parallel, and designed to respectively hold the first guide pin 42 and the second guide pin 48 in a perpendicular relationship with respect to the rotor 34 such that the first friction member 30 is held in a first plane that is parallel with the first braking surface 34a and the second friction member 32 is held in a second plane that is parallel with the second braking face 34b on rotor 34.
  • pressurized fluid is supplied to the actuation chamber 28 that acts on a piston 26 and moves face 3Of of the pad 30a on the first friction member 30 into engagement with the first braking surface 34a and acts on caliper 16 to move the face 32f of the pad 32a on the second friction member 32 into engagement with the second braking surface 34b to develop a brake force to reduce the rotation of rotor 34.
  • pressurized fluid is presented to the actuation chamber 28, braking continues until the rotation of the rotor 34 is reduced to a level corresponding to the presentation of pressurized fluid to actuation chamber 28 under the control of an operator.
  • seal 27 of the retraction arrangement 70 acts on piston 26 to urge the piston 26 toward a position of rest in the actuation chamber 28, at the same time the first 72 and second 74, 74' retraction members respectively act on backing plate 29 of the first friction member 30 and on backing plate 31 of the second friction member 32 to move pads 30a and 32a away from face 34a and 34b on rotor 34 to define first and second running clearances.
  • the first 72 and second 74, 74' retraction members of the retraction arrangement 70, 70' are defined by a magnetic material.
  • the first retraction member 72 is defined by an end cap that is attached to piston 26 with the end cap being retained in a groove 33 as show in figures 2 and 4.
  • the first retraction member 72 may be defined as a disc 72a that is retained in a piston 26a as illustrated in figure 5.
  • the second retraction member 74, 74' is defined by a plurality of buttons that are located in grooves 21 , 21 ' and on arms 20, 20' as illustrated in figures 2 and 3.
  • the number and size of the buttons may vary but it is suggested that the effective area of the buttons be equal to the end cap such that metal backing plate 29 and metal backing plate 31 are held with a same force within the caliper 16.
  • the metal backing plate 29 and the metal backing plate 31 move in the same manner as the piston 26 moves away from the rotor 34 to define running clearances X and X' as shown in figure 3.
  • pressurized fluid is supplied to an actuation chamber 28 that acts on piston 26 and acts on actuation section 18 to develop an actuation force that respectively move pad 30a on the first friction member 30 into engagement with face 34a and move pad 32a on the second friction member 32 into engagement with face 34b of rotor to retard the rotation of rotor 34 and effect a brake application.
  • seal 27 moves piston 26 away from rotor 34.

Landscapes

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

Abstract

La présente invention concerne un ensemble frein à disque (10) qui comporte une pluralité d'éléments de rétraction (72, 74, 74') retenus dans un élément de support (35) fixé à un véhicule. Des première (30) et seconde (32) plaquettes de frein sont déplacées magnétiquement avec un piston (26) pour définir des premier (X) et second (X') espaces libres de fonctionnement par rapport à un rotor (34).
PCT/US2008/012520 2007-11-27 2008-11-06 Frein à disque WO2009070198A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94544607A 2007-11-27 2007-11-27
US11/945,446 2007-11-27

Publications (2)

Publication Number Publication Date
WO2009070198A2 true WO2009070198A2 (fr) 2009-06-04
WO2009070198A3 WO2009070198A3 (fr) 2009-08-27

Family

ID=40679188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/012520 WO2009070198A2 (fr) 2007-11-27 2008-11-06 Frein à disque

Country Status (1)

Country Link
WO (1) WO2009070198A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102330762A (zh) * 2011-07-22 2012-01-25 江苏安捷汽车配件有限公司 一种采用铷铁硼磁铁的刹车装置
US8287055B2 (en) 2010-09-28 2012-10-16 Robert Bosch Gmbh Brake control of a vehicle based on driver behavior
ES2527896A1 (es) * 2013-07-29 2015-01-30 Gas Gas Motos, S.A. Sistema de separación de pastillas de freno para motocicletas
US20230135838A1 (en) * 2021-10-28 2023-05-04 Mando Corporation Brake assembly with active piston retraction

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312319A (en) * 1963-12-14 1967-04-04 Marine Engineering Company Sto Permanent magnet operated clutch and brake
US3988624A (en) * 1971-03-15 1976-10-26 Eaton Corporation Self-gauging sensor assembly
US5046404A (en) * 1990-11-19 1991-09-10 Schnorenberg Jr Walter H Magnetic disk brake retractor
US6293370B1 (en) * 1998-10-24 2001-09-25 Meritor Heavy Vehicle Systems, Llc Vehicle brake having electric motor control of brake running clearance
US20030052562A1 (en) * 2001-09-18 2003-03-20 Wabco Perrot Bremsen Gmbh Brake
US6959792B2 (en) * 2001-09-25 2005-11-01 Trw Limited Retraction mechanism for disc brake assembly
US20070170018A1 (en) * 2005-11-28 2007-07-26 Hb Performance Systems, Inc. Positive pad retraction and retention device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312319A (en) * 1963-12-14 1967-04-04 Marine Engineering Company Sto Permanent magnet operated clutch and brake
US3988624A (en) * 1971-03-15 1976-10-26 Eaton Corporation Self-gauging sensor assembly
US5046404A (en) * 1990-11-19 1991-09-10 Schnorenberg Jr Walter H Magnetic disk brake retractor
US6293370B1 (en) * 1998-10-24 2001-09-25 Meritor Heavy Vehicle Systems, Llc Vehicle brake having electric motor control of brake running clearance
US20030052562A1 (en) * 2001-09-18 2003-03-20 Wabco Perrot Bremsen Gmbh Brake
US6959792B2 (en) * 2001-09-25 2005-11-01 Trw Limited Retraction mechanism for disc brake assembly
US20070170018A1 (en) * 2005-11-28 2007-07-26 Hb Performance Systems, Inc. Positive pad retraction and retention device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8287055B2 (en) 2010-09-28 2012-10-16 Robert Bosch Gmbh Brake control of a vehicle based on driver behavior
CN102330762A (zh) * 2011-07-22 2012-01-25 江苏安捷汽车配件有限公司 一种采用铷铁硼磁铁的刹车装置
ES2527896A1 (es) * 2013-07-29 2015-01-30 Gas Gas Motos, S.A. Sistema de separación de pastillas de freno para motocicletas
US20230135838A1 (en) * 2021-10-28 2023-05-04 Mando Corporation Brake assembly with active piston retraction
US11994183B2 (en) * 2021-10-28 2024-05-28 Hl Mando Corporation Brake assembly with active piston retraction

Also Published As

Publication number Publication date
WO2009070198A3 (fr) 2009-08-27

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