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
  • F16D65/123—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
  • 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
  • F16D65/02—Braking members; Mounting thereof
  • F16D2065/13—Parts or details of discs or drums
  • F16D2065/134—Connection
  • F16D2065/1344—Connection permanent, e.g. by casting
• • 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

Definitions

• the present invention relates to a brake disc of a motor vehicle.
• the invention belongs to the field of braking devices for motor vehicles.
• Known braking devices can brake a wheel of a vehicle by clamping a brake ring of a brake disc fixed on a hub of this wheel. The tightening is obtained by moving, against the brake ring, two brake pads disposed on either side of the disc. The friction of the brake pads against the brake ring of the disk converts the mechanical energy of rotation of the disk into heat energy and brakes the wheel of the vehicle.
• the brake disc is generally made of a single piece of cast iron, which has the disadvantage of being heavy. This affects the performance and fuel consumption of the vehicle.
• Document EP-A2-1 892 434 discloses a brake disk consisting, on the one hand, of a cast iron brake ring for rubbing against brake pads and, on the other hand, of a central steel bowl. for fixing the brake disc to the hub of a wheel of a vehicle.
• Such a brake disk has a reduced mass, but has a disadvantage: the connection between the central bowl and the brake ring presents risks of rupture during the braking of the vehicle.
• an automotive brake disc comprising:
• the central bowl has a circular flange, a cylindrical portion and a flange;
• the cylindrical portion extends from the outer periphery of the flange to the flange;
• the rim extends radially between the cylindrical portion and the braking ring
• the outer periphery of the rim is a polygon whose vertices are rounded.
• the cylindrical portion comprises at least one recess.
• This recess reduces the mass of the central bowl and therefore that of the brake disc.
• the braking ring is overmolded on the rim.
• the flange comprises a plurality of bores.
• the flange comprises at least one centering pin.
• This centering pin facilitates the correct positioning of the brake disc relative to a wheel hub.
• the flange mentioned above comprises in its center a circular recess.
• This recess facilitates the centering of the brake disc on a wheel hub bearing.
• this flange comprises in its center a stamped portion extending in the opposite direction to the braking ring.
• This stamped portion is used to seal a bearing of the wheel hub on which the disk is intended to be fixed.
• the central bowl is made by stamping a sheet of steel or stainless steel.
• this sheet has a thickness of between one and four millimeters.
• the invention also relates to a motor vehicle comprising at least one such brake disc.
• FIG. 1A is a perspective view of a first particular embodiment of a brake disk according to the invention
• FIG. 1 B is a sectional view of a brake disc according to this first particular embodiment
• FIG. 1C is a perspective view of a central bowl of a brake disc according to this same first embodiment
• FIG. 2A is a perspective view of a second particular embodiment of a brake disc according to the invention.
• FIG. 2B is a sectional view of a brake disc according to this second particular embodiment
• FIG. 2C is a perspective view of a central bowl of a brake disc according to the same second embodiment.
• Figures 1A, 1B and 1C show views of a brake disc 1 of a motor vehicle, in a first particular embodiment of the invention.
• the brake disc 1 is intended to be fixed on a wheel hub and contributes to the braking of this wheel.
• This brake disk 1 comprises a braking ring 11 and a central bowl 12.
• the brake ring 1 1 receives the braking forces of the vehicle. In a conventional manner, these braking forces are applied by clamping brake pads on either side of this braking ring January 1. The friction of the brake pads against the brake ring 1 1 converts the mechanical energy of rotation of the disc 1 into heat energy and brakes the wheel of the vehicle.
• the brake ring 1 1 is for example made of cast iron. Alternatively, other materials adapted to the braking of a vehicle can be used for the realization of the brake ring January 1.
• the central bowl 12 is intended to be fixed to a wheel hub of the vehicle.
• this bowl 12 is formed of a circular flange 122, a cylindrical portion 123 and a flange 127.
• the circular flange 122 has in its center a circular recess 124.
• the circular recess 124 facilitates the centering of the brake disc 1 on a wheel hub bearing.
• This flange 122 also comprises bores 125 and at least one centering lug 126, arranged around the circular recess 124.
• the flange 122 may comprise four bores 125 and two centering lugs 126.
• the bores 125 are intended to come opposite bores made on the wheel hub on which the brake disc 1 can be fixed by nuts. This fixing is performed by positioning these nuts through the bores 125 of the brake disc 1 and screwing the nuts in the bores of the wheel hub.
• each centering pin 126 extends axially in the direction of the brake ring January 1 and is intended to cooperate with a bore of the wheel hub.
• Each lug 126 thus facilitates the correct positioning of the brake disc 1 relative to the wheel hub.
• the cylindrical portion 123 extends between the outer periphery of the circular flange 122 and the flange 127.
• the flange 127 extends radially between the cylindrical portion 123 and the brake ring January 1.
• the brake ring 1 1 is connected to the bowl 12 by overmolding on the flange 127. Overmolding means that a portion of the central bowl 12 is embedded in the material of the brake ring January 1.
• the outer periphery of the flange 127 visible in Figure 1 C, of circular general shape, is a polygon whose vertices are rounded.
• the shape of the periphery of the rim 127 makes it possible, unlike a totally circular shape, to create variations in the radius of the periphery of the rim 127 which make it possible to block the rotation of the central bowl 12 with respect to the braking ring 1 1.
• peripheral ripples of the rim 127 make it possible to improve the connection of the bowl 12 with the braking ring 11, in particular during braking. This avoids a rupture of the overmolded connection between the brake ring January 1 and the bowl 12 during braking.
• Recesses 121 are made in the cylindrical portion 123 to reduce the mass of the bowl 12 and thus the brake disc 1.
• the recesses 121 do not extend to the rim 127. This makes it possible to improve the mechanical strength of the bowl 12, in particular during a braking. In addition, this makes it possible to minimize the risk of "putting in umbrella” of the brake ring 1 1.
• umbrella is meant that the ends of the ring 1 1 fold (like an umbrella), which affects the proper functioning of the brake disc by creating a residual friction between the brake ring and the pads of brake.
• the cylindrical portion 123 may have an inner diameter corresponding to the outer diameter of the wheel hub. Thus, during the introduction of the brake disc 1, the cylindrical portion 123 participates in the correct positioning of the brake disc 1 relative to the wheel hub.
• the bowl 12 may for example be obtained by stamping a sheet of a material such as steel or stainless steel.
• a steel sheet having a thickness of between 1 and 4 millimeters (mm), is well adapted to the production of the bowl 12 and makes it possible to reduce the mass of the brake disc 1.
• FIGS. 2A, 2B and 2C show views of a brake disc 2 of a motor vehicle, in a second particular embodiment of the invention.
• the brake disc 2 is intended to be fixed on a wheel hub and participates in the braking of this wheel.
• This brake disc 2 comprises a braking ring 21 and a central bowl 22.
• the braking ring 21 receives the braking forces of the vehicle. In a conventional manner, these braking forces are applied by clamping brake pads on either side of this braking ring 21.
• the brake ring 21 is for example made of cast iron. Alternatively, other materials adapted to the braking of a vehicle can be used for the realization of the braking ring 21.
• the central bowl 22 is intended to be fixed to a wheel hub of the vehicle.
• This bowl 22 is formed of a circular flange 222, a cylindrical portion 223 and a flange 227.
• the circular flange 222 comprises at its center a stamped portion 224.
• the stamped portion 224 allows the positioning of a wheel rim on the brake disc 2 and sealingly protects a bearing of the hub. wheel.
• This flange 222 also has bores 225 and at least one centering pin 226, arranged around the circular recess 224.
• the flange 222 may comprise four bores 225 and two centering pins 226.
• the bores 225 are intended to come opposite bores made on the wheel hub on which the brake disc 2 can be fixed by nuts. This fixing is performed by positioning these nuts through the bores 225 of the brake disc 2 and screwing the nuts in the bores of the wheel hub.
• each centering pin 226 extends axially in the direction of the brake ring 21 and is intended to cooperate with a bore of the wheel hub.
• Each lug 226 thus facilitates the correct positioning of the brake disk 2 relative to the wheel hub.
• the cylindrical portion 223 extends between the outer periphery of the circular flange 222 and the flange 227.
• the flange 227 extends radially between the cylindrical portion 223 and the braking ring 21.
• the brake ring 21 is connected to the bowl 22 by overmolding on the rim
• the outer periphery of the flange 227 visible in FIG. 2C, of circular general shape, is a polygon whose vertices are rounded.
• peripheral ripples of the rim 227 make it possible to improve the connection of the bowl 22 with the braking ring 21, in particular during braking. This avoids a rupture of the overmolded connection between the brake ring 21 and the bowl 22 during braking.
• Recesses 221 are made in the cylindrical portion 223 to reduce the mass of the bowl 22 and thus the brake disc 2.
• the recesses 221 do not extend to the rim 227. This improves the mechanical strength of the bowl 22, particularly during braking. In addition, as in the first embodiment, the risk of umbrella setting of the brake ring 21 is thus minimized.
• the cylindrical portion 223 may have an inner diameter corresponding to the outer diameter of the wheel hub. Thus, during the introduction of the brake disc 2, the cylindrical portion 223 participates in the correct positioning of the brake disc 2 relative to the wheel hub.
• the bowl 22 may for example be obtained by stamping a sheet of a material such as steel or stainless steel. For example, a steel sheet, having a thickness of between 1 and 4 millimeters (mm), is well adapted to the production of the bowl 22 and makes it possible to reduce the mass of the brake disc 2.
• a brake disk according to the invention has a low mass and the mechanical strength of the connection between the bowl and the brake ring is improved, in particular during braking of the vehicle.
• the invention further facilitates the positioning of the brake disc when mounted on a wheel hub.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=49876815

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Citations (3)

Family Cites Families (8)

• 2013
  • 2013-09-18 FR FR1358966A patent/FR3010756B1/fr active Active
• 2014
  • 2014-08-06 CN CN201480051562.7A patent/CN105556156B/zh not_active Expired - Fee Related
  • 2014-08-06 WO PCT/FR2014/052045 patent/WO2015040296A1/fr active Application Filing
  • 2014-08-06 EP EP14755886.0A patent/EP3047172A1/de not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (1)

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