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
  • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
  • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
  • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
• • 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
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
  • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
  • F16D65/095—Pivots or supporting members therefor
• • 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
  • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. 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
  • F16D65/00—Parts or details
  • F16D65/005—Components of axially engaging brakes not otherwise provided for
  • F16D65/0068—Brake calipers
• • 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
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
  • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. 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
  • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
  • F16D2055/0004—Parts or details of disc brakes
  • F16D2055/0016—Brake calipers
• • 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
  • F16D2200/00—Materials; Production methods therefor
  • F16D2200/0004—Materials; Production methods therefor metallic
• • 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
  • F16D2200/00—Materials; Production methods therefor
  • F16D2200/0004—Materials; Production methods therefor metallic
  • F16D2200/0008—Ferro
  • F16D2200/0021—Steel
• • 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
  • F16D2200/00—Materials; Production methods therefor
  • F16D2200/0034—Materials; Production methods therefor non-metallic
  • F16D2200/0052—Carbon

Definitions

• the invention relates to the technical field of disc brakes, and in particular to the pads fitted to such brakes.
• kinetic parameters such as the speed of rotation of the disc, the kinetic energy of the vehicle carrying the brake in question and in particular the kinetic energy to be dissipated at each braking;
• the thermal parameters of the brake and in particular its ability to resist the heat generated during the conversion of kinetic energy into thermal energy, or even to dissipate this heat.
• the pad of a brake is a wear part, and its replacement must be easy. Also its assembly, and in particular the kinematic link connecting it to the stirrup, must be as simple as possible. This connection is therefore generally minimalist, and is ensured by functional surfaces that are as small as possible and as simple as possible.
• One of the aims of the invention is to overcome the drawbacks of the prior art by proposing a pad for a disc brake caliper, which is light and resistant.
• a pad for a disc brake caliper has been developed, the pad comprising a support plate receiving a lining.
• the support sheet is made of a low alloy steel, comprising less than 0.3% by mass of carbon, and preferably less than 0.2%, and vanadium in an amount between 0 .2 and 0.3% by mass, the remainder preferably being iron with possibly reasonably foreseeable impurities.
• the sheet is for example made of 15CDV6 steel.
• the sheet has kinematic connection means with a brake calliper.
• part of these connecting means is configured to withstand greater mechanical forces than the rest of the connecting means, and takes the form of a portion reinforced. The other part is on the contrary lightened.
• the support sheet has a first lug of a first diameter, and a second lug of a second diameter greater than the first diameter.
• Each lug is configured to cooperate respectively with a first sleeve and a second sleeve of a caliper, producing a sliding connection between the pad and the caliper.
• the reinforced portion is the second ear. Since the surface of the second lug transmitting the forces is greater, the contact pressure is lower, which prevents caulking.
• the invention also relates to a stirrup comprising a first sleeve of a first diameter and a first length, and a second sleeve of a second diameter different from the first diameter and of a second length different from the first length.
• the sockets connecting two jaws of the caliper.
• the caliper receives pads comprising a support plate having a first lug of the first diameter, and a second lug of the second diameter, and each lug is configured to cooperate respectively with the bushings.
• the support plate has a first lug and a second lug, configured to cooperate respectively with sockets of a caliper of identical diameters, forming a slide connection between the pad and the caliper, and the reinforced portion is an increase in the dimensions of the plate near the second lug.
• the invention also relates to the stirrup comprising two sleeves of identical diameters connecting two jaws of the stirrup; two pads having lugs configured to cooperate with the sockets; and a stopper.
• the support sheet has an asymmetrical part configured to leave a passage for the abutment.
• the invention also relates to a caliper for a disc brake equipped with a pad according to the aforementioned characteristics.
• the invention finally relates to a disc brake receiving a brake caliper according to the aforementioned characteristics.
• the disk is made of cementation steel, preferably 18NiCr5-4 or 16NC6.
• the choice of such a material to make the disc makes it possible to have a disc capable of being compatible with the pads according to the invention. Indeed, as these pads provide better braking performance, a significant amount of heat is generated briefly and repeatedly. Such temperature cycles represent hardening cycles for the disc, which risks breaking under the effect of the modification of its mechanical characteristics or under the effect of thermal fatigue. Using a case-hardened steel makes it possible to overcome such drawbacks.
• FIG.1 is a front view of a disc brake according to the invention.
• FIG.2 is a side view of such a brake.
• FIG.3 is an illustration of an exploded view of a brake caliper according to the invention.
• FIG.4 is a partial front view of such a stirrup.
• FIG.5 is a perspective view of another stirrup according to the invention.
• FIG.6 is a partial front view of such a stirrup.
• the invention lies in the choice of a particular alloy to produce a support plate (11) of a plate (10), intended to equip a stirrup (20) with a brake (30) disc (40).
• the alloy of the plate (11) is 15CDV6.
• the tests carried out reside in bending tests on LMEX700 test pieces and 15CDV6 test pieces.
• the specimens have identical dimensions, except for the thickness of 4 mm for Imex 700 and 3 mm for 15CDV6.
• the specimen is held horizontally and fixedly at one end by a clamp and a mass is suspended from the other end of the specimen.
• a section of the specimen, close to the flange, has been reduced to ensure that the specimen bends there.
• the distance between the free end of the specimen and the area of reduced section is 150 mm
• the specimen is first tested at a temperature of 21° C. by suspending masses until plastic deformation of the reduced section.
• test results are compiled in the table below, noting that given the difference in thickness between the specimens, the calculated induced stress has been normalized to take account of said difference.
• 15CDV6 resists an induced stress of 785 Mpa when heated to 600°C, whereas Imex 700 only resists a stress of 459 Mpa.
• the 15CDV6 is therefore 70% more resistant than the lmex700.
• the sheet (11) can withstand higher stresses, the plate (10) is more efficient and the brake (30) is designed for greater braking forces.
• the pads (10) and the disc (40) heat up more during their use, and during intensive use, they can reach high temperatures, above 700°C.
• the disc (40) is made of a non-hardenable steel, of the carburizing steel type, that is to say it comprises less than 0.3% carbon. Such a disc (40) is therefore less sensitive to temperature cycles than is obtained with the wafer (10) improved according to the invention.
• the pad (10) is, in the illustrated mode, asymmetrical: a single reinforced portion (19) is present, arranged so as to retain the pad (10) in the direction of braking (DF) illustrated in Figures 3 and 6. Since the pads (10) are asymmetrical, they should not be mounted upside down on the caliper (20). Keying means are therefore present.
• Figures 3 and 4 illustrate a first embodiment, in which:
• the keying means are a difference between a first mounting diameter and a second mounting diameter
• the reinforced portion (19) is the second diameter, which is greater than the first diameter.
• the support plate (11) has a first lug (17a) of the first diameter, and a second lug (17b) of the second diameter, and each lug (17a, 17b) is configured to cooperate respectively with a first sleeve (21a) of the first diameter and a second sleeve (21 b) of the second diameter, connecting the jaws (20a, 20b) of the caliper (20) and thus producing a sliding connection between the pad (10) and the caliper (20).
• the second diameter is greater than the first diameter, the surface of the connection absorbing the significant braking forces is greater. Conversely, the contact pressure is lower and matting of this surface is avoided.
• first sleeve (21a) and the second sleeve (21b) are not reversed in the bracket (20), their assembly also incorporates keying means.
• first sleeve (21a) has a first length
• second sleeve (21b) has a second length different from the first length.
• the keying means are an asymmetry of the sheet (11), which leaves a passage (16) for a stop (22) of the stirrup (20). ;
• the reinforced portion (19) is an enlargement of the sheet (11), on the side opposite the passage (16).
• the passage (16) which is in the mode illustrated in the form of a bevel, is used so that the abutment (22) only allows the mounting of the wafer (10) in one mounting direction.
• This passage (16) is formed on the side of a first lug (17a) of the sheet (11), which does not absorb the high braking forces, due to the direction of assembly of the pad (10).
• the reinforced portion (19) is arranged on the side of a second lug (17b) of the sheet, which absorbs the significant braking forces, due to its mounting direction.
• the reinforced portion (19) in the form of an enlargement of the dimensions, makes it possible to locally increase the quadratic moment of the sheet (11), thus preventing its deformation under load. On the side of the first ear (17a), it is not necessary to increase the quadratic moment, therefore the dimension of the sheet is on the contrary reduced.
• the two sleeves (21) connecting the jaws (20a, 20b) of the stirrup (20) are of identical diameters.
• the stirrup (20) has its own keying means so as not to be mounted upside down on the vehicle.
• the pad (10), the caliper (20) and the brake (30) can be shaped differently from the examples given without departing from the scope of the invention, which is defined by the claims.
• the pad (10), the caliper (20) and the brake (30) can be adapted in terms of cost, functionality and performance.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=81580927

Family Applications (1)

Country Status (5)

Family Cites Families (3)

• 2022
  • 2022-01-31 FR FR2200826A patent/FR3132336B1/fr active Active
  • 2022-10-20 CN CN202280090714.9A patent/CN118661039A/zh active Pending
  • 2022-10-20 WO PCT/FR2022/051991 patent/WO2023144454A1/fr not_active Ceased
  • 2022-10-20 US US18/832,369 patent/US20250341240A1/en active Pending
  • 2022-10-20 EP EP22813646.1A patent/EP4457447A1/de active Pending

Also Published As

Similar Documents

Legal Events