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
  • 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
  • F16D2065/134—Connection
  • F16D2065/1356—Connection interlocking
  • F16D2065/136—Connection interlocking with relative movement radially
• • 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
  • F16D2065/1392—Connection elements

Definitions

• the invention relates to a brake disk for a motor vehicle according to the preamble of patent claim 1.
• So-called composite brake discs so brake discs whose friction ring and brake disc hub made of different materials are well known. Such is disclosed for example in DE 198 30 666 A1.
• Composite brake discs are increasingly being used, since the separation of the brake disc hub and the friction ring makes it possible, in each case, to optimize the aforementioned parts for their use.
• DE 198 30 666 A1 teaches to provide a profile on an inner circumference of the friction ring and to press the brake disk hub to this profile by hydroforming.
• the hydroforming is a complex process, which is associated with relatively high production costs. Since the hydroforming of the brake disk hub creates a play-free seating of the friction ring on the brake disk chamber both in the radial and in the axial direction, such brake disks are still associated with the disadvantage that there is no scope for compensating for different thermal expansion of the friction ring and brake disk chamber.
• a brake disc according to the preamble of claim 1 further develop so that their production is simplified and greater design freedom in the design of the axial and radial securing of brake disk pot against friction ring are opened.
• Such a brake disk has a brake disk pot and a friction ring disposed coaxially therewith, wherein an outer lateral surface of the brake disk pot has a profile which engages in a complementary profile of an inner circumferential surface of the friction ring for torque transmission. Furthermore, an axial securing of the friction ring relative to the brake disk chamber is provided. According to the invention, this axial securing is provided by at least one tab on the outer circumferential surface of the brake disk hub.
• the profile of the brake disk hub thus assumes only the function of the radial securing, ie the torque transmission between the brake disk chamber and the friction ring.
• the axial securing is performed by a separate element, namely a tab.
• no additional fasteners are needed to keep the friction ring secured to the brake disc chamber in the axial direction. This simplifies the manufacture of the brake disc and thereby saves costs.
• the tab for axial securing from the wall of the brake disc hub is punched out and bent. This can advantageously be done in a single step with a suitable tool, so that a particularly simple production of the brake disc according to the invention is made possible.
• the tab may alternatively engage in an opening of the friction ring or abut a surface of the friction ring.
• an axially oriented stopper can also fulfill an enforcement, which can also be realized in one work step. As a result, if required, higher axial forces than with radially shaped tabs can be supported.
• At least one radially projecting retaining element is formed on one edge of the outer circumferential surface of the brake disk hub, which bears against an end face of the friction ring. This ensures additional securing of the friction ring in the axial direction, again requiring no additional connecting elements.
• tab on the outer lateral surface of this holding element can be produced by a simple, one-step forming process.
• the profiles of the friction ring and the brake disk chamber are designed as toothing. This allows a particularly good and low-load torque transmission between the brake disk hub and friction ring.
• the possibility of axial expansion also offers a holding element, which rests only partially on the friction ring and in the intermediate region a distance in the order of the thermal friction ring extension or the
• Axialverschiebungs cassettes has. This ensures an elastic-plastic character of the stop.
• tab and retaining element results in a particularly precise geometric positioning between the brake disc and the friction ring, which reduces the unwanted flattening of the brake disc.
• the axial displaceability between the two components is preferably prevented by an excess of the brake disk hub.
• a flank angle of the toothing of the brake disk hub is 55 ° to 65 °.
• the toothing is preferably formed asymmetrically, with a gap width of the toothing of the friction ring 4.5 to 6 mm and a gap width of the toothing of the brake disc hub is 7.5 to 9.5 mm.
• the brake disk pot is preferably made of steel. In this case, electrochemical corrosion is advantageously avoided in the connection of the brake disk hub with a friction ring made of cast iron.
• the invention further relates to a motor vehicle with a brake disc of the type described.
• Fig. 1 is a perspective view of an embodiment of a brake disc according to the invention
• Fig. 2 is a detail view of the axial and radial securing elements of such a brake disc and
• Fig. 3 is a sectional view through the toothing between the brake disk hub and friction ring of an embodiment of a brake disc according to the invention.
• FIGS. 4A and B show a detailed view of the axial and radial securing elements of such a brake disc in an alternative embodiment.
• a designated as a whole with 10 brake disc comprises a brake disc hub 12 and a friction ring 14.
• the friction ring has two friction surfaces 16, 18 which come in operation of the brake in tribological contact with the brake shoes. Due to the particularly good frictional properties such friction rings 14 are usually made of cast iron, in particular gray cast iron.
• the friction ring 14 is designed as an internally ventilated friction ring and consists of two friction ring halves 20, 22 which are interconnected via connecting knobs 24, which are not all designated for clarity. As a result, 26 channels 26 are formed between the friction ring halves 20, through which ambient air can flow and thus dissipate heat.
• each channels 28 are introduced, which open into the channels 26 and on the friction surfaces 16, 18 exit to further improve the air flow of the friction ring 14.
• the brake disk cup 12 has an end face 30, into which openings 32, 34 are inserted, so as to connect the brake disk cup with a hub. Furthermore, the brake disk cup 12 has a jacket wall 38, via which the brake disk cup 12 is connected to the friction ring 14. Since no requirements are made with respect to its friction properties to the brake disk hub 12, this can be carried out to save weight instead of cast iron from sheet metal, such as steel.
• the casing wall 38 of the brake disk cup 12 has a tooth profile which engages in a complementary profile of an inner casing wall 40 of the friction ring 12.
• a radial securing of the friction ring 14 with respect to the brake disk hub 12 is achieved, so that torques between the two parts 12, 14 can be transmitted.
• tabs 42 are punched out of the casing wall 38, which engage in complementary openings of the friction ring 14, which can not be seen in the drawing.
• a further axial securing is produced by holding elements 44, which project radially outward at the edge 46 of the jacket wall 38 and bear against the inner surface 48 of the friction ring half 22.
• the tabs 42 can not engage in receiving openings of the friction ring half 22, but rather abut against the friction surface 18 of the second friction ring half 22. Due to the respective distances between tabs 42 and retaining elements 44, a floating mounting of the friction ring 14 on the brake disk hub 12 can be achieved, so that a certain amount of play remains in the axial direction. Thus, for example, different thermal expansions of the friction ring 14 and the brake disk hub 12 can be compensated.
• the toothing between the friction ring 14 and the brake disk hub 12 is formed asymmetrically, wherein the teeth 50 of the brake disk hub 12 are made narrower than the teeth 52 of the friction ring 14.
• the gap width d1 of the toothing of the friction ring 14 is 4, 5 to 6 mm, the gap width d2 of the teeth of the brake disk hub 12 7.5 to 9.5 mm.
• the flank angle ⁇ of the teeth of the brake disk hub is between 55 ° and 65 °.
• Such an asymmetrical and closely meshed toothing of the brake disk cup 12 and the friction ring 14 achieves a particularly good and low-wear torque transmission between the brake disk cup 12 and the friction ring 14.
• 4A and B show an alternative embodiment in which a tab 52 engages around the edge of the jacket wall of the brake disk hub, the friction ring, wherein a counter-lock is provided by a stop 54.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=42126184

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (29)

Family Cites Families (12)

• 2009
  • 2009-03-07 DE DE102009012216A patent/DE102009012216A1/de not_active Withdrawn
• 2010
  • 2010-02-11 WO PCT/EP2010/000863 patent/WO2010102704A1/de active Application Filing
  • 2010-02-11 US US13/255,019 patent/US20120085603A1/en not_active Abandoned
  • 2010-02-11 JP JP2011552338A patent/JP2012519806A/ja active Pending
  • 2010-02-11 EP EP10706920A patent/EP2404075A1/de not_active Withdrawn
  • 2010-02-11 CN CN2010800108887A patent/CN102341612A/zh active Pending

Non-Patent Citations (1)

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