GB2093936A - Disc brake - Google Patents

Disc brake Download PDF

Info

Publication number
GB2093936A
GB2093936A GB8204776A GB8204776A GB2093936A GB 2093936 A GB2093936 A GB 2093936A GB 8204776 A GB8204776 A GB 8204776A GB 8204776 A GB8204776 A GB 8204776A GB 2093936 A GB2093936 A GB 2093936A
Authority
GB
United Kingdom
Prior art keywords
friction ring
bell
disc
brake
shaped
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.)
Granted
Application number
GB8204776A
Other versions
GB2093936B (en
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.)
Continental Teves AG and Co oHG
Original Assignee
Alfred Teves 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 Alfred Teves GmbH filed Critical Alfred Teves GmbH
Publication of GB2093936A publication Critical patent/GB2093936A/en
Application granted granted Critical
Publication of GB2093936B publication Critical patent/GB2093936B/en
Expired 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
    • F16D65/12—Discs; Drums for disc brakes
    • F16D65/128—Discs; Drums for disc brakes characterised by means for cooling
    • 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
    • F16D65/0006—Noise or vibration control
    • 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
    • F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
    • 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
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/1304—Structure
    • F16D2065/1316—Structure radially segmented
    • 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
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/1304—Structure
    • F16D2065/1328—Structure internal cavities, e.g. cooling channels
    • 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
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1348—Connection resilient
    • 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
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1356—Connection interlocking
    • F16D2065/1368—Connection interlocking with relative movement both radially and axially

Landscapes

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

Abstract

A brake disc (1) for a disc brake is composed integrally of a friction ring (2) and a bell-shaped disc portion (3). To reduce deformation, as for instance warping of the disc surface or torsion of the friction ring (2) and the bell- shaped disc portion (3), the coupling of the friction ring (2) to the bell- shaped disc portion (3) is designed elastically within limits, so that the deformation and tension caused thereby will be removed at this point and the danger of cracking and possible destruction of the brake disc (1) resulting therefrom will be reduced. The bell-shaped disc portion (3) includes for this purpose axial slots (10) which form webs (12) whose cross-section decreases towards the friction ring (2). <IMAGE>

Description

SPECIFICATION Disc brake This invention relates to a brake disc for a disc brake of the kind which is composed of a friction ring and a bell-shaped disc portion extending in the direction of the axis of rotation for non rotatable engagement between the friction ring and an element to be braked, which bell-shaped portion includes webs at its end close to the friction ring, these webs having several axially extending slots, carrying at their ends the friction ring and having a varying cross-section throughout their length.
Brake discs of the kind referred to are employed in brakes subjected to high thermal and mechanical stresses, wherein jamming may occur between the friction ring and the bell-shaped portion as a result of thermal expansion of the friction riny, for example. Such jamming can cause deformation of the disc surface and torsion of the friction ring and/or bell-shaped portion.
Local overheating will ensue and result in cracks which may end in the destruction of the brake disc. In addition, there is the danger of axial movement being blocked in the case of a brake disc which is designed to be axially slidable.
A brake disc is described in British Patent Specification No. 1,133,1 10 wherein the friction ring is connected to the bell-shaped portion by fasteners such as screws, for example, At the end of the bell-shaped disc portion close to the friction ring are axially directed slots which delineate a number of fingers spread over the periphery.
These fingers are angled off at their free end and coupled to the friction ring. The other end of the fingers is delineated by bores in the bell-shaped portion, these bores representing the end of the slots and having a diameter larger than the slot width; the fingers have a smaller cross-section in this end area than in the end area which lies close to the friction ring.
By arranging the fingers in the end area of the bell-shaped disc portion, a radial flexibility is produced in this area. Because of the end of the slots being formed by a bore with larger diameter, -the finger will be particularly yielding in this area of smaller cross-section, the latter laying in the extension of the bell-shaped portion, so that deformations which are caused by, for instance, thermal expansion of the friction ring will be compensated for predominantly in this area.In the area of the transition bell-shaped disc portion/friction ring, the fingers are less yielding because of the larger cross-section, the angled-off shape and the screw coupling, and, as a result, due to the rigidity at this point, the torsions between the bell-shaped disc portion and the friction ring are removed only to an incomplete degree, and the tension caused is transmitted to the bell-shaped portion in a disadvantageous manner. It has to be regarded as a further disadvantage that an undesired heat flow.
takes place almost unhinderedly between the friction ring and the bell-shaped disc portion as a result of the slot width being small in relation to the circumference of the bell-shaped portion.
It is an object of the present invention to provide a brake disc of the kind initially referred to which, for the purpose of reduction of deformations and torsions, is elastic within limits in the area where the bell-shaped disc portion is articulated to the friction ring, and wherein thermal stresses are minimized.
According to the invention in its broadest aspect, a brake disc for a disc brake of the kind referred to is characterized in that the friction ring and the bell-shaped disc portion are formed integrally and in that the cross-section of the webs decreases towards the friction ring.
By virtue of the inventive construction, the coupling of the bell-shaped portion of the disc to the friction ring is elastic within limits. This has as a consequence a reduction of the high rigidity of the arrangement friction ring/bell-shaped disc portion in this area so that elastic compensating movements of the friction ring are possible; thus, deformations and warpings as well as the tension resulting therefrom will be reduced in a favourable manner. In a particularly expedient way, this ensures the axial slidability of the floatingly-arranged brake disc.The shape of the webs having a smaller cross-section at the point of articulation prevents the bell-shaped portion of the disc from being excessively heated up due to the passing of heat from the brake ring onto the bell-shaped disc portion and thereby avoids the disadvantage of the slidability being impaired.
In a favourable manner, the thermal stresses exerted on the disc are reduced by arranging for radially extending cooling-air ducts to be accommodated in the interior of the friction ring; in addition to this, the flow of air through the cooling'air ducts is improved by the slots which form further intake ports for the air flow.
The webs may be spread over the circumference of the bell-shaped portion at a different distance from one another or, alternatively, the slots may be of different dimensions. Such an asymmetric arrangement of the webs or varying the dimensions of the slots accomplishes a reduction of brake noise in a very simple way by partial elimination of the vibrations caused.
Embodiments of the invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 is a view of a disc brake incorporating a first slot shape, Figure 2 is a section taken along the line lI-li in Figure 1, Figure 3 is a development of the bell-shaped disc portion having slot openings of different design, with the slot openings having differing dimensions and distances one from the other.
In Figures 1 and 2, reference numeral 1 designates the brake disc of a brake unit, the disc being composed of a friction ring 2 and a bellshaped disc portion 3. The friction ring 2 comprises two axially-spaced friction discs 4 and 5 which are interconnected by radialiy-extending ribs 6. The ribs 6 form cooling-air ducts 7 for cooling the brake disc 1 by ventilation and are curved like vanes in a manner (not shown) for achieving good flow conditions. The friction ring 2 is formed from a casting integrally with the tubular bell-shaped disc portion 3 that extends in the direction of the axis of rotation. At its end remote from the friction ring 2, the bell-shaped disc portion 3 has a collar 8 which is provided with several bores 9 permitting the brake disc 1 to be fastened in a rotation-preventing manner.A large number of slots 10 which extend axially and are scattered over the periphery is arranged at the bell-shaped disc portion 3. The slots 10 extend from an unslotted area 11 of the bell-shaped disc portion 3, adjacent the collar 8, to the friction ring 2 and increase in width continuously; this provides a large number of axially-extending webs 12 along the circumference of the bell-shaped disc portion 3, these webs having their smaliest cross-section at the transition from the bell shaped disc portion 3 to the friction ring 2. The webs 12 extend in an axial direction up to the friction disc 5.
When viewing the development of the bell shaped disc portion, the slots are designed approximately trapezoidally, with the larger trapeze base line being located at the friction ring 2. In the embodiment according to Figure 1, the smaller trapeze base line is rounded in a circular manner so that the slot 10 has almost the shape of a V. Because of the webs 12 having the smallest cross-section in the point of articulation between the friction ring 2 and the bell-shaped disc portion 3, there is formed a coupling of the bell-shaped disc portion 3 to the friction ring 2 which is elastic within limits.
Figure 3 shows the development of the circumference of the bell-shaped disc portion. In this embodiment, the trapezoidal slots 10 are not spread over the circumference equi-distantly, but have slightly varying distances from each other, e.g. the distances X, Y. Further, it can be seen that the axial depth of the slots 10, for instance relative to one another, also differs by the amount S.
A reduction of brake noise will be achieved in that the bell-shaped element is asymmetrical and, therefore, has bad oscillating properties.
In another embodiment (not shown), each web 12 terminates beneath a cooling-air duct 7, and its end is designed as a guide surface for the air flow.

Claims (5)

Claims
1. Brake disc for a disc brake of the kind which is composed of a friction ring and a bell-shaped disc portion extending in the direction of the axis of rotation for non-rotatable engagement between the friction ring and an element to be braked, which beli-shaped portion includes webs at its end close to the friction ring, these webs having several axially extending slots, carrying at their ends the friction ring and having a varying cross-section throughout their length, characterized in that the friction ring (2) and the bell-shaped disc portion (3) are formed integrally and in that the cross-section of the webs (12) decreases towards the friction ring (2).
2. Brake disc as claimed in claim 1, characterized in that the friction ring (2) accommodates in its interior radially extending cooling-air ducts (7).
3. Brake disc as claimed in claim 1 or 2, characterized in that the webs (12) are spread over the circumference of the bell-shaped portion (3) at a different distance from one another.
4. Brake disc as claimed in any one of the preceding claims, characterized in that there are provided slots (10) of different dimensions.
5. Brake disc for a disc brake substantially as described with reference to the accompanying drawings.
GB8204776A 1981-02-26 1982-02-18 Disc brake Expired GB2093936B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813107124 DE3107124A1 (en) 1981-02-26 1981-02-26 BRAKE DISC FOR A DISC BRAKE

Publications (2)

Publication Number Publication Date
GB2093936A true GB2093936A (en) 1982-09-08
GB2093936B GB2093936B (en) 1984-09-19

Family

ID=6125756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8204776A Expired GB2093936B (en) 1981-02-26 1982-02-18 Disc brake

Country Status (5)

Country Link
BR (1) BR8200988A (en)
DE (1) DE3107124A1 (en)
FR (1) FR2500553A1 (en)
GB (1) GB2093936B (en)
IT (1) IT1190697B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143264A1 (en) * 1983-10-01 1985-06-05 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Disc brake and mould and method for manufacturing such a disc brake.
EP1245852A2 (en) * 2001-03-20 2002-10-02 Bayerische Motoren Werke Aktiengesellschaft Vehicle disc brake
US6722478B2 (en) 2000-11-10 2004-04-20 Bayerische Motoren Werke Aktiengesellschaft Assembly for vehicle brake disk
CN100559040C (en) * 2004-09-16 2009-11-11 乔治费希尔汽车技术有限公司 The brake disc assembly of automotive wheel
US7677368B2 (en) 2004-06-04 2010-03-16 Brembo S.P.A. Apparatus for controlling the coning in a brake rotor
US8720654B2 (en) 2009-04-09 2014-05-13 Bayerische Motoren Werke Aktiengesellschaft Brake disc pot for motor vehicles
US20190093719A1 (en) * 2015-07-24 2019-03-28 Ap Racing Limited Disc brakes and braking systems

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3805994A1 (en) * 1988-02-25 1989-09-07 Bayerische Motoren Werke Ag DISC BRAKE FOR A MOTOR VEHICLE
DE3942651C1 (en) * 1989-12-22 1991-07-18 Bayerische Motoren Werke Ag, 8000 Muenchen, De Cooling air passage for disc brake - has air flow aperture in brake cover, and inner, peripheral, air guide protrusion
FR2675221B1 (en) * 1991-04-09 1993-06-11 Renault Vehicules Ind BRAKE DISC FORMING A ROTATING HUB.
DE19505014A1 (en) * 1995-02-15 1996-08-22 Teves Gmbh Alfred Brake disc for use in disc brake assembly
DE19843399A1 (en) * 1998-09-22 2000-03-23 Volkswagen Ag Brake disc for disc brakes
DE19929391B4 (en) * 1999-06-28 2011-01-13 Saf-Holland Gmbh brake disc
DE19943893A1 (en) * 1999-09-14 2001-03-15 Continental Teves Ag & Co Ohg Brake disc
SE531202C2 (en) * 2006-09-13 2009-01-13 Scania Cv Abp Brake disc and vehicle
DE102008047625B4 (en) * 2008-09-17 2015-04-30 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Internally ventilated brake disc
FR3049999B1 (en) * 2016-04-08 2019-06-21 Peugeot Citroen Automobiles Sa ALLEGE BRAKE DISC
DE102016117008A1 (en) 2016-09-09 2018-03-15 Gigant - Trenkamp & Gehle Gmbh Hub flange with attached brake disc assembly
DE102017130290B4 (en) * 2017-12-18 2022-04-28 Saf-Holland Gmbh brake disc

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211041B (en) * 1963-11-26 1966-02-17 Teves Kg Alfred Brake disc with a pot-shaped hub
DE1480319B2 (en) * 1965-03-17 1977-03-31 ROTATING FRICTION BODY OF A FRICTION BRAKE
GB1133110A (en) * 1966-06-30 1968-11-06 Girling Ltd Improvements in or relating to disc brakes
FR1488139A (en) * 1966-08-01 1967-07-07 Budd Co Rotor for disc brakes
DE1630304A1 (en) * 1967-06-24 1971-06-03 Daimler Benz Ag Brake disc for motor vehicles, especially internally cooled, provided with cooling blades
DE1625827C3 (en) * 1967-09-20 1975-04-24 Alfred Teves Gmbh, 6000 Frankfurt Ventilated brake disc with two friction rings
DE2110482A1 (en) * 1971-03-05 1972-09-14 Porsche Kg Internally ventilated brake disc
DE2128594C3 (en) * 1971-06-09 1980-08-07 Zahnraederfabrik Renk Ag, 8900 Augsburg Liquid-cooled, dry-running full-lined single-disc brake
DE2557649C2 (en) * 1975-12-20 1985-10-03 Schwäbische Hüttenwerke GmbH, 7080 Aalen Brake disc
GB1587825A (en) * 1976-12-11 1981-04-08 Girling Ltd Discs for disc brakes
DE2901349A1 (en) * 1978-01-20 1979-07-26 Kawasaki Heavy Ind Ltd CRUSH-PROOF BRAKE DISC FOR VEHICLE BRAKES

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0143264A1 (en) * 1983-10-01 1985-06-05 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Disc brake and mould and method for manufacturing such a disc brake.
US6722478B2 (en) 2000-11-10 2004-04-20 Bayerische Motoren Werke Aktiengesellschaft Assembly for vehicle brake disk
EP1245852A2 (en) * 2001-03-20 2002-10-02 Bayerische Motoren Werke Aktiengesellschaft Vehicle disc brake
EP1245852A3 (en) * 2001-03-20 2003-03-12 Bayerische Motoren Werke Aktiengesellschaft Vehicle disc brake
US7677368B2 (en) 2004-06-04 2010-03-16 Brembo S.P.A. Apparatus for controlling the coning in a brake rotor
CN100559040C (en) * 2004-09-16 2009-11-11 乔治费希尔汽车技术有限公司 The brake disc assembly of automotive wheel
US8720654B2 (en) 2009-04-09 2014-05-13 Bayerische Motoren Werke Aktiengesellschaft Brake disc pot for motor vehicles
US20190093719A1 (en) * 2015-07-24 2019-03-28 Ap Racing Limited Disc brakes and braking systems

Also Published As

Publication number Publication date
FR2500553B1 (en) 1985-02-22
IT8219817A0 (en) 1982-02-24
GB2093936B (en) 1984-09-19
DE3107124C2 (en) 1988-06-23
DE3107124A1 (en) 1982-09-09
IT1190697B (en) 1988-02-24
BR8200988A (en) 1983-01-04
FR2500553A1 (en) 1982-08-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930218