EP3175135A1 - Tambour de frein comportant une masse annulaire espacée de la couronne de frottement - Google Patents
Tambour de frein comportant une masse annulaire espacée de la couronne de frottementInfo
- Publication number
- EP3175135A1 EP3175135A1 EP15759504.2A EP15759504A EP3175135A1 EP 3175135 A1 EP3175135 A1 EP 3175135A1 EP 15759504 A EP15759504 A EP 15759504A EP 3175135 A1 EP3175135 A1 EP 3175135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- brake drum
- annular mass
- brake
- wall
- 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- Withdrawn
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
- F16D65/10—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
- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/1332—Structure external ribs, e.g. for cooling or reinforcement
-
- 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
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0007—Casting
Definitions
- the present invention relates to a brake drum, in particular for braking a motor vehicle, and a motor vehicle equipped with such brake drums.
- Motor vehicles generally comprise a braking system comprising a brake pedal acting on a master cylinder, for transmitting by hydraulic circuits a pressure of the fluid to the brakes which act on each wheel of the vehicle.
- a known type of brake comprises a drum attached to a hub rotating with the wheel, having a circular ring comprising an inner cylindrical surface receiving the pressure of two brake segments which deviate under the effect of an internal hydraulic control cylinder .
- the brake drum generally made of a cast iron cast member, has by its mass a certain capacity for absorbing thermal energy during pronounced braking, and its outer surface a low exchange capacity by convection to the ambient air, even with small grooves or ribs generally disposed outside the crown.
- the ring being held axially on the front side facing the outside of the vehicle, by a radial flange forming the fastening on the hub, this flange at the same time ensures better cooling of the front part of this ring, as well as radial mechanical holding of this front part.
- a known type of drum presented in particular by the document FR-B1-2830914, comprises an outer ring of aluminum alloy overmolded on the rear and outer surfaces of a brake drum.
- Another known drum type presented in particular by the document FR-B1 -2966537 comprises a cylindrical sheet whose inner surface constitutes the braking track, the outer surface receiving a ring fixed on it, before then receiving by overmolding a thermal mass of aluminum alloy that clings to this ring.
- the present invention is intended to avoid these disadvantages of the prior art.
- a cast iron one-piece molded brake drum comprising a circular ring having a cylindrical internal surface of friction, and a radial flange arranged axially on the front side, designed to fix this drum on a hub, characterized in that it comprises a continuous annular mass arranged around the ring and spaced radially from this ring, which is connected to the ring by a substantially transverse wall, and a succession of ribs arranged in axial planes, which connect the ring. crown to this wall.
- This brake drum is that the continuous annular mass disposed at a distance from the ring, with the wall connecting it to this ring rigidly by imposing a fixed spacing, forms a radial rib comprising a height giving a high rigidity to the crown, remaining more noticeably cold and therefore dilatant little, this which significantly limits the expansion of the front side of the drum that is most likely to open.
- the axial ribs maintain the wall supporting the annular portion in the same transverse plane, avoiding buckling under the effect of the high stresses due to expansion, which allows for a relatively thin wall. It is then possible to make a ring of reduced section, which gives a lighter brake drum while having a lower deformation.
- the brake drum according to the invention may further comprise one or more of the following features, which may be combined with each other.
- the total radial height of the annular mass with respect to the ring is greater than half the width of the internal friction surface.
- the radial height may be about two-thirds the width of the inner friction surface.
- the annular mass is axially arranged in the rear half of the width of the internal friction surface.
- the radial wall axially comprises a thickness less than that of the annular mass.
- the axial ribs may terminate radially outwardly on the side of the annular mass.
- the invention also relates to a motor vehicle comprising a braking system equipped with brake drums which comprise any one of the preceding characteristics.
- FIG. 1 is a perspective view of a brake drum according to the invention.
- - Figure 2 is an axial section of the brake drum
- - Figure 3 is a perspective view of a brake drum according to a variant
- FIG. 4 is an axial section of the brake drum.
- Figures 1 and 2 show a brake drum having a circular ring 2 having a cylindrical inner friction surface 4 receiving the pressure of the brake shoes, which is centered on a main axis A.
- the ring gear 2 is connected on the front side, indicated by the arrow "AV", by a curvature to a radial flange 6 having a central transverse planar portion having four bores 8 receiving the fixing screws of a wheel on its hub, as well as a complementary bore 12 receiving a drum clamping screw on the hub.
- a central bore 10 in the middle of the radial flange 6, carries out the centering of the brake drum on the hub.
- a succession of ribs 18 arranged in axial planes and equally spaced, comprise a substantially triangular shape having a base covering the entire width of the annular ring 2, in front of the radial wall 16, and a height covering the entire height of this wall radial, stopping just below the annular mass 14.
- An annular mass 14 is obtained fixed very rigidly to the ring 2 by the transverse wall 16, with a distance kept constant by this wall, giving the assembly a high stiffness.
- the ring 2 being able to heat up strongly by the friction of the brake shoes, the annular mass 14 then being heated slightly by its distance, and by its very good ventilation thanks to the large surface of exchange with the air, we obtain with this rigid assembly a significant limitation of the thermal expansion of the rear portion of this ring.
- this rigid assembly in particular, in the tangential direction there is a work in compression of the crown 2 and in traction of the annular mass 14.
- the large number of regularly distributed ribs 18 consolidates the transverse wall 16 by preventing a buckling of its substantially transverse shape during the high stresses caused by an expansion of the crown 2.
- the assembly formed by the annular mass 14, the transverse wall 16 and the axial ribs 18 constitutes a thermal mass that rapidly absorbs the calories generated at the friction on the ring 2, as well as a large surface area towards the outside of the brake drum, which favors by its rotation the thermal exchanges with the ambient air.
- the amount of additional material constituted by the annular mass 14, the transverse wall 16 and the axial ribs 18, being relatively limited, can be realized a brake drum lightened compared to equivalent solutions concerning the resistance to intensive braking.
- the studies presented show a possible reduction in mass of around 8%.
- this brake drum does not include undercut in the axial direction, can be easily achieved with a mold comprising only two cavities forming two parts.
- This type of molding remains simple and economical, the cost of the brake drum according to the invention hardly changes.
- Figures 3 and 4 show alternatively a brake drum comprising a slightly different design, having a transverse wall 16 which has a greater thickness, close to that of the annular mass 14, and axial ribs 18 which arrive radially to the outside substantially in the middle of this annular mass.
- the radial height H of the annular mass 14 with respect to the ring 2 is greater than half the width L of the inner friction surface 4.
- the radial height H may in particular be equal to at about two-thirds of this width L.
- annular mass 14 is in both cases axially in the rear half of the width of the inner friction surface 4, so as to ensure better holding of this rear portion of the ring 2.
- the reduced weight of the brake drum makes it possible to reduce the consumption of the vehicle, and to improve the dynamic behavior of this vehicle by reducing unsprung masses.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1457479A FR3024512B1 (fr) | 2014-08-01 | 2014-08-01 | Tambour de frein comportant une masse annulaire espacee de la couronne de frottement |
PCT/FR2015/051909 WO2016016537A1 (fr) | 2014-08-01 | 2015-07-10 | Tambour de frein comportant une masse annulaire espacée de la couronne de frottement |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3175135A1 true EP3175135A1 (fr) | 2017-06-07 |
Family
ID=51519145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15759504.2A Withdrawn EP3175135A1 (fr) | 2014-08-01 | 2015-07-10 | Tambour de frein comportant une masse annulaire espacée de la couronne de frottement |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3175135A1 (fr) |
CN (1) | CN106574677B (fr) |
FR (1) | FR3024512B1 (fr) |
WO (1) | WO2016016537A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4130505A1 (fr) | 2021-08-06 | 2023-02-08 | Edertek, S.Coop | Tambour et frein à tambour pour véhicules |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5383537A (en) * | 1993-03-16 | 1995-01-24 | Eaton Corporation | Brake drum having an extension ring with chill fins and cooling fins formed thereon |
JP2001099200A (ja) * | 1999-09-28 | 2001-04-10 | Honda Motor Co Ltd | 不整地走行用車輪のドラムブレーキ構造 |
US6286639B1 (en) * | 1999-09-30 | 2001-09-11 | Daimlerchrysler Corporation | Serrated tuned brake drum |
FR2830914B1 (fr) | 2001-10-12 | 2004-12-17 | Renault | Tambour de freinage de masse reduite et a performances augmentees |
KR100489380B1 (ko) * | 2003-02-11 | 2005-05-16 | 현대모비스 주식회사 | 차량용 드럼 브레이크 |
KR20040072916A (ko) * | 2003-02-11 | 2004-08-19 | 현대모비스 주식회사 | 차량용 드럼 브레이크 |
JP3982698B2 (ja) * | 2003-12-24 | 2007-09-26 | 本田技研工業株式会社 | ブレーキドラム |
US20080308364A1 (en) * | 2007-06-13 | 2008-12-18 | Webb Wheel Products, Inc. | Lightweight brake drum with middle position squealer band |
FR2936289B1 (fr) * | 2008-09-25 | 2011-10-14 | Renault Sas | Tambour et moyeu tambour de frein a echange thermique perfectionne notamment pour vehicule automobile, et vehicule equipe |
FR2966537B1 (fr) | 2010-10-22 | 2012-11-30 | Peugeot Citroen Automobiles Sa | Tambour de frein, en particulier pour vehicule automobile, comportant un surmoulage |
FR2992385B1 (fr) * | 2012-06-26 | 2015-10-16 | Peugeot Citroen Automobiles Sa | Tambour de frein perfectionne pour systeme de freinage de vehicule |
-
2014
- 2014-08-01 FR FR1457479A patent/FR3024512B1/fr not_active Expired - Fee Related
-
2015
- 2015-07-10 CN CN201580041270.XA patent/CN106574677B/zh not_active Expired - Fee Related
- 2015-07-10 WO PCT/FR2015/051909 patent/WO2016016537A1/fr active Application Filing
- 2015-07-10 EP EP15759504.2A patent/EP3175135A1/fr not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2016016537A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4130505A1 (fr) | 2021-08-06 | 2023-02-08 | Edertek, S.Coop | Tambour et frein à tambour pour véhicules |
Also Published As
Publication number | Publication date |
---|---|
FR3024512B1 (fr) | 2016-08-05 |
CN106574677A (zh) | 2017-04-19 |
FR3024512A1 (fr) | 2016-02-05 |
CN106574677B (zh) | 2020-09-01 |
WO2016016537A1 (fr) | 2016-02-04 |
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