WO2003081072A1 - Dispositif de freinage ameliore pour vehicules - Google Patents

Dispositif de freinage ameliore pour vehicules Download PDF

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Publication number
WO2003081072A1
WO2003081072A1 PCT/IT2003/000158 IT0300158W WO03081072A1 WO 2003081072 A1 WO2003081072 A1 WO 2003081072A1 IT 0300158 W IT0300158 W IT 0300158W WO 03081072 A1 WO03081072 A1 WO 03081072A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction
braking device
rotary
contour
disc
Prior art date
Application number
PCT/IT2003/000158
Other languages
English (en)
Inventor
Lenin Capalbo
Original Assignee
Lenin Capalbo
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 Lenin Capalbo filed Critical Lenin Capalbo
Priority to AU2003219538A priority Critical patent/AU2003219538A1/en
Publication of WO2003081072A1 publication Critical patent/WO2003081072A1/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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • 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
    • F16D65/10—Drums for externally- or internally-engaging 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
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums 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
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D2069/004—Profiled friction surfaces, e.g. grooves, dimples

Definitions

  • the present invention relates to an improved braking device, specifically designed for vehicles.
  • wheeled vehicles such as cars and trucks comprise braking systems, which conventionally include disc or drum brakes.
  • the drum brakes in particular, have a comparatively narrow range of applications .
  • Drum brakes comprise a drum element fixed to the hub of the wheel, and outside of the brake shoes, thereby providing a larger braking surface, the size being the same, and a good protection for the inner component elements, whereas the dispersion of the generated heat is made through an outer finned arrangement .
  • the drum is usually made of cast iron, steel, aluminium (with a cast iron applied braking band) or it is molded from a steel sheet metal.
  • Said drum brake comprises moreover two shoes made of cast aluminium, with applied steel plug elements for bearing against the brake cam, or being made of a stamped sheet material, as electrically welded.
  • the shoes can be supported at their end portions by a simple metal detent element, having a flat bearing surface (the so-called self-centering shoes).
  • the drum brake comprises moreover the friction linings, having a useful thickness of substantially 3 ⁇ 6 mm, which can be consumed before the lining replacement.
  • the friction linings are made of a fabric material or asbestos fibers, which are greatly compressed and impregnated with bakelite or other synthetic materials.
  • the friction linings comprise moreover embedded threads or chips made of annealed copper.
  • the friction linings are riveted on the shoes or are glued to said shoes by using specifically designed glueing methods.
  • the system is completed by one or more shoe return springs, two adjusting cams for adjusting the position of the shoes against the detent arrangement therefor, a further cam (the so-called “olive”) or a hydraulic cylinder driving the shoes , against the counter-biassing force of the return spring.
  • the friction coefficient between the friction linings and drum substantially corresponds to 0.30 ⁇ 0.35; usually, it changes as the operating temperature changes.
  • the average pressure is of 8 ⁇ 12 kg/cm 2 ( ⁇ 0.8 ⁇ 1.2 MN/m 2 ); the contact arch of each shoe is usually of 100° ⁇ 120°.
  • the following types of drum brakes are conventionally used: a) with one winding shoe and one unwinding shoe, in which the performance is the same in the two driving direction of the vehicle; b) with two winding shoes; in this case, during the reverse driving of the vehicle, depending on the types , the two shoes can operate either as unwinding shoes or as winding shoes; c) with two shoes, a primary shoe and a secondary shoe, both operating as winding shoes both in the forward and in the reverse driving of the vehicle; this type of brake is characterized by the fact that the secondary shoe is driven by the primary shoe through a connecting rod coupling or the like; this solution, however, is at present not used in motor vehicles; d) with multiple shoes, i.e. with three or more shoes .
  • drum brakes must be subjected to regular adjusting operations, which are performed after a given wearing of the friction linings thereof.
  • One of the most common systems is that using adjusting cam elements.
  • the adjustment of the clearance can also be performed by an automatic type of adjustment, in which a fixed pin prevents the shoe from being moved away, in its return stroke, from the drum for a distance greater than 1 mm.
  • the disc brakes can be of two types, i.e. of a rotary disc type and of a fixed disc type, but the latter is scarcely used.
  • the rotary disc brake conventionally comprises a disc element made of a special cast iron material, or other materials, or composite materials, and being fixed to the hub of the wheel and two or more sectors made of a friction material glued or riveted on metal small plates, as well as a fixed element, the so-called caliper, bridging the rotary disc.
  • the friction sectors, supported and guided by the caliper, are pressed, as the brake is actuated, against the two faces of the disc, with a mechanical, hydraulic or mixed type of drive. Because of the comparatively high operating pressures, the friction linings are quickly worn and, accordingly, they have a comparatively large thickness (10 ⁇ 25 mm). Also in such a brake, it is necessary to provide adjusting devices for automatically recovering the operating clearances.
  • the disc brakes are the mainly used braking systems for cars and the like. Generally, in all of the above disclosed brakes, the braking efficiency depends on the surface involved in the contact between the friction lining and disc or drum surface.
  • the aim of the present invention is to provide a braking device having a braking efficiency greater than that of conventional braking devices having like weights and size.
  • a main object of the invention is to provide such an improved braking device which can be used on conventionally series made vehicles.
  • Yet another object of the present invention is to provide such a braking device which is very reliable in operation.
  • Yet another object of the present invention is to provide such a braking device which can be made by using existing methods, systems and materials.
  • an improved braking device for vehicles comprising a rotary element having a friction surface and a fixed element having a friction lining including a friction surface adapted to operate on the friction surface of the rotary element to brake the rotary movement of the rotary element, with respect to the fixed element, and being characterized in that the friction surfaces of the rotary element and fixed element have, in cross-section with respect to the advancing direction of the rotary element, relatively to the fixed element, a mating contour comprising a polygonal or mixed line.
  • Figure 1 is a cross-sectioned and partial view of a disc brake according to the invention
  • Figures 2-5 are further partial cross- sectioned views illustrating different configurations of the friction lining of the braking device according to the present invention
  • Figure 6 is a cross-sectioned front elevation view illustrating a disc of a braking device
  • Figure 7 is a further side elevation view of the disc of the preceding figure.
  • Figure 8 is a further cross-sectioned front elevation view of the drum of a braking device.
  • Figure 9 is a further side elevation view of a drum brake comprising the drum element of the preceding figure.
  • the braking device comprise a rotary element having a friction surface and a fixed element having a friction lining including a friction surface adapted to operate on the friction surface of the rotary element to brake the rotary movement of the rotary element, with respect to the fixed element.
  • the braking device in particular, can comprise a disc brake, as shown in figures 1-7, or a drum brake, as shown in figures 8 and 9.
  • the braking device according to the present invention which has been generally indicated by the reference number 1 , comprises a disc 2 , which is made rotatively rigid with a vehicle wheel, not shown, and on which operate one or more pairs of friction linings 3, which are driven, in a per se known manner, by a caliper 4, rigid with the vehicle chassis.
  • the friction surface 5 of the disc 2, thereon the friction lining 3 operates has, in cross-section with respect to the circumferential rotary direction of the disc, a contour comprising a line which, differently from the conventional brakes, is not straight, but being polygonal or "mixed” .
  • This polygonal or mixed contour or profile is designed for mating with an analogous contour of the friction surface 6 of the corresponding friction lining 3.
  • the friction surfaces have a slotted contour of triangular, trapezoidal cross- section, including both straight and curved sides, as shown, by way of an example, in figures 2-5.
  • the inclined sides of the slots will provide, at the braking starting moment, a comparatively small involved surface which will be increased exponentially as the friction lining moves toward the disc to fully contact its surface.
  • Figures 8 and 9 show a braking system 101 according to the present invention having the configuration of a drum disc.
  • the rotary element comprises a drum element 102, having an inner friction surface 105 thereon operate a pair of friction linings 103, supported by respective shoes 104.
  • drum brake The operation and general construction of such a drum brake are well known and, accordingly, they will not be herein disclosed in further details.
  • the friction surface 105 of the drum 102 has, in cross- section with respect to the circumferential rotary direction of the drum, a contour comprising a line, which is not straight, as in conventional drum brakes, but being polygonal or mixed line.
  • Such a polygonal contour, or mixed contour can be mated with a like contour of the friction surface of the corresponding friction lining 103.
  • the invention fully achieves the intended aim and objects.
  • the invention provides an improved braking device, specifically adapted to be used on motor vehicles, which allows the braking and road driving of the vehicle to be greatly improved.
  • the used materials can be any according to requirements and the status of the art.

Landscapes

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

Abstract

Un dispositif de freinage amélioré (1, 101) pour véhicules comprend un élément rotatif (2, 102) présentant une surface de friction ainsi qu'un élément fixe comprenant une garniture de friction (3, 103) présentant une surface de friction (6) adaptée pour fonctionner sur la surface de friction (5, 105) de l'élément rotatif, pour freiner le mouvement rotatif de l'élément rotatif par rapport à l'élément fixe, et étant caractérisé en ce que les surfaces de friction de l'élément rotatif et de l'élément fixe présentent, en section par rapport au sens d'avance de l'élément rotatif par rapport à l'élément fixe, un contour apparié, comprenant une configuration polygonale ou mixte.
PCT/IT2003/000158 2002-03-27 2003-03-17 Dispositif de freinage ameliore pour vehicules WO2003081072A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003219538A AU2003219538A1 (en) 2002-03-27 2003-03-17 Improved braking device for vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002MI000641A ITMI20020641A1 (it) 2002-03-27 2002-03-27 Dispositivo frenante perfezionato particolarmente per veicoli
ITMI2002A000641 2002-03-27

Publications (1)

Publication Number Publication Date
WO2003081072A1 true WO2003081072A1 (fr) 2003-10-02

Family

ID=11449590

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2003/000158 WO2003081072A1 (fr) 2002-03-27 2003-03-17 Dispositif de freinage ameliore pour vehicules

Country Status (3)

Country Link
AU (1) AU2003219538A1 (fr)
IT (1) ITMI20020641A1 (fr)
WO (1) WO2003081072A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2401508A1 (es) * 2011-10-06 2013-04-22 Luis RAMÍREZ DÍAZ Conjunto disco-pastillas de freno con superficie de rozamiento aumentada.
JP2014005888A (ja) * 2012-06-25 2014-01-16 Akio Furukawa 駆動制御装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR783076A (fr) * 1934-12-21 1935-07-08 Perfectionnements aux freins pour automobiles
US2041935A (en) * 1934-12-08 1936-05-26 R W Fair Friction brake
FR1337353A (fr) * 1962-07-24 1963-09-13 Dispositif augmentant l'efficacité des freins sur tous véhicules ou sur toutes installations fixes de freinage
GB1124004A (en) * 1965-02-13 1968-08-14 Mario Barale Braking device for vehicle wheels
AU2067770A (en) * 1970-10-02 1972-04-13 Feil Julius Improved clutch or brake
FR2183309A5 (fr) * 1972-05-02 1973-12-14 Chieppi Rodolphe
DE4336094A1 (de) * 1993-10-22 1995-04-27 Winter Fritz Eisengiesserei Bremsscheibe
US5816901A (en) * 1993-04-09 1998-10-06 Sirany; Dallas R. Method of resurfacing a vehicles's braking rotors and drums
DE19913735A1 (de) * 1999-03-26 2000-11-02 Horst Kern Reibscheibe

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2041935A (en) * 1934-12-08 1936-05-26 R W Fair Friction brake
FR783076A (fr) * 1934-12-21 1935-07-08 Perfectionnements aux freins pour automobiles
FR1337353A (fr) * 1962-07-24 1963-09-13 Dispositif augmentant l'efficacité des freins sur tous véhicules ou sur toutes installations fixes de freinage
GB1124004A (en) * 1965-02-13 1968-08-14 Mario Barale Braking device for vehicle wheels
AU2067770A (en) * 1970-10-02 1972-04-13 Feil Julius Improved clutch or brake
FR2183309A5 (fr) * 1972-05-02 1973-12-14 Chieppi Rodolphe
US5816901A (en) * 1993-04-09 1998-10-06 Sirany; Dallas R. Method of resurfacing a vehicles's braking rotors and drums
DE4336094A1 (de) * 1993-10-22 1995-04-27 Winter Fritz Eisengiesserei Bremsscheibe
DE19913735A1 (de) * 1999-03-26 2000-11-02 Horst Kern Reibscheibe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2401508A1 (es) * 2011-10-06 2013-04-22 Luis RAMÍREZ DÍAZ Conjunto disco-pastillas de freno con superficie de rozamiento aumentada.
JP2014005888A (ja) * 2012-06-25 2014-01-16 Akio Furukawa 駆動制御装置

Also Published As

Publication number Publication date
AU2003219538A1 (en) 2003-10-08
ITMI20020641A1 (it) 2003-09-29
ITMI20020641A0 (it) 2002-03-27

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