WO2018025980A1 - Brake disc - Google Patents

Brake disc Download PDF

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Publication number
WO2018025980A1
WO2018025980A1 PCT/JP2017/028343 JP2017028343W WO2018025980A1 WO 2018025980 A1 WO2018025980 A1 WO 2018025980A1 JP 2017028343 W JP2017028343 W JP 2017028343W WO 2018025980 A1 WO2018025980 A1 WO 2018025980A1
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WO
WIPO (PCT)
Prior art keywords
disc
disk
fin
sliding surface
sliding
Prior art date
Application number
PCT/JP2017/028343
Other languages
French (fr)
Japanese (ja)
Inventor
橋田 浩一
Original Assignee
株式会社アドヴィックス
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Filing date
Publication date
Application filed by 株式会社アドヴィックス filed Critical 株式会社アドヴィックス
Publication of WO2018025980A1 publication Critical patent/WO2018025980A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/02Braking members; Mounting thereof
    • F16D65/12Discs; Drums for disc brakes

Definitions

  • the present invention relates to a brake disc.
  • Patent Document 1 for the purpose of “obtaining a brake disc free of noise generation”, “at least two discs of different frequencies are superposed and dispersed so that both can give freedom to each other. It is described that "we bond together in multiple places.” Specifically, it is described that two disks are integrally joined by a rivet at a portion sliding with the brake pad. That is, in the brake disc described in Patent Document 1, the brake noise is reduced by friction damping.
  • the rotor may be a plate-like member having a sliding surface on one side. Divide and project fins alternately on the opposite side of each sliding surface of these plate-like bodies, attach a damping material to each of the tip faces of these fins, and join these plate-like bodies to each other with the damping material
  • a disk brake rotor is described, which is characterized in that it is assembled with a bolt and a nut and ventilation is formed inside. That is, in the brake disc described in Patent Document 2, the brake noise is reduced by the damping effect of the damping material.
  • Patent Document 3 aims to “provide a mold structure and a casting method for avoiding deterioration in product quality in casting using a center gate type mold poured radially from the vicinity of the axial center of the cavity for annular member”.
  • the mold structure comprises at least one core 12a and at least one pair of molds 12b disposed sandwiching the core 12a, having a cavity for casting an annular member, and A spout 19 and a tap 18 are provided in the vicinity of the axial center so that the molten metal is diffused radially and poured in.
  • the pair of molds 12 b extends in one or both of the axial direction from the entire circumference of the outer peripheral surface It has a collar portion 15 and is configured to surround the outer periphery of the core 12a with the collar portion 15 to prevent deformation and collapse due to expansion of the core 12a.Gas that escapes from the cavity to the outer peripheral surface of the mold 12b
  • the brake disc configuration described in Patent Document 1 (referred to as “frictional damping configuration”) is applied to the brake disc described in Patent Document 2 to obtain a noise suppressing effect by friction damping. Try that.
  • FIG. 6 is a partial cross-sectional view as viewed in the direction perpendicular to the rotational axis Jwh of the disks when the uneven portions of the first disk D1 and the second disk D2 are brought into contact with each other so as to be engaged alternately.
  • the depth (length) of the recess for example, as shown by the X portion
  • the contact at the other part is It is inhibited. That is, as illustrated in the Y portion and the Z portion, a gap is generated between the convex portion and the concave portion. If the gap is filled with damping material, this gap is not an issue.
  • Patent Document 3 is an example of a method of integrally casting a ventilated disc.
  • a core is required from the inner circumference to the outer circumference.
  • the brake noise performance and the cooling performance be highly optimized for general brake discs. That is, as a brake disc, a structure that has a frictional damping effect secured and a high degree of freedom in design in the shape (number, width, etc.) of the vents is desired.
  • An object of the present invention is to provide a brake disc having a laminated structure, which can effectively obtain friction damping and has high cooling performance with a simple structure.
  • a brake disc (BRD) according to the present invention is fixed to a wheel (WH) of a vehicle and generates braking force on the wheel (WH) by being sandwiched by two friction pads (MSA, MSB).
  • the brake disc (BRD) includes one of the two friction pads (for example, MSA), a first disc (BDA) in sliding contact with the first sliding surface (Maa), and the two friction pads. And the second disk (BDB) in sliding contact with the second sliding surface (Mba).
  • the first disc (BDA) is a plurality of elongated protrusions on a first back surface (Mab) opposite to the first sliding surface (Maa)
  • the first disk has a first fin portion (Fna)
  • the second disk (BDB) has a plurality of elongated protrusions on a second back surface (Mbb) opposite to the second sliding surface (Mba)
  • the flat surface (Maf) and the “second fin surface (Mbf) formed parallel to the second sliding surface (Mba) in the second fin portion (Fnb)” are fixed in surface contact with each other. .
  • the first disc (BDA) is a plurality of elongated protrusions on a first back surface (Mab) opposite to the first sliding surface (Maa) “A first fin plane (Maf) formed in parallel to the first sliding surface (Maa) in the first fin portion (Fna)” and “the second disc (the second disk) having the first fin portion (Fna)
  • the second back surface (Mbb) opposite to the second sliding surface (Mba) of (BDB) is fixed in surface contact.
  • a third brake disc (BRD) comprises one of the two friction pads (for example, MSA) and a first disc (BDD) in sliding contact with the first sliding surface (Mda).
  • an intermediate disk (BDC) provided in between.
  • the two planes of the intermediate disc (BDC) are parallel, and a plurality of elongated grooves (Zma, Zmb) are formed in at least one of the two planes.
  • the first disc (BDD) and the intermediate disc (BDC) are in surface contact with each other, and the second disc (BDE) and the intermediate disc (BDC) are in surface contact with each other.
  • FIG. 1 is a front view and a cross-sectional view for describing a first embodiment of a brake disk BRD according to the present invention. It is the front view and cross-sectional view for demonstrating the shape of 1st disc BDA.
  • FIG. 7 is a cross-sectional view for explaining a modification of the first embodiment of the brake disk BRD according to the present invention.
  • FIG. 7 is a front view and a cross-sectional view for describing a second embodiment of a brake disk BRD according to the present invention. They are the front view for demonstrating middle disc BDC, and a partial side view. It is a fragmentary sectional view in order to explain the subject in the case of trying to obtain friction damping by applying a prior art.
  • a first embodiment of a brake disc BRD according to the present invention will be described with reference to the front view and the cross-sectional view of FIG.
  • the component members and the parts to which the same symbol is attached perform the same function. Therefore, duplicate explanations may be omitted.
  • the brake disc BRD is a friction disc of a disc brake employed for braking the wheel WH in a vehicle.
  • the brake disc BRD is sandwiched between the two friction pads MSA, MSB and fixed to the wheel WH so as to rotate together.
  • the brake disc BRD receives a pressing force so as to be sandwiched by the first and second friction pads MSA and MSB.
  • the pressing force at this time causes a frictional force when the first and second friction pads MSA, MSB and the brake disc BRD slide.
  • the wheel WH generates a braking force by this frictional force.
  • the brake disc BRD includes a first disc BDA, a second disc BDB, a hat member HTB, and a fastening member TKB.
  • the first disk BDA is a circular disk member.
  • the first disc BDA is in sliding contact with the first friction pad MSA (inner side friction pad) at the outer peripheral portion of the first sliding surface Maa (inner side flat surface) so that the wheel WH (tire) generates a braking force.
  • the region sliding with the first friction pad MSA is the “sliding range” of the first disc BDA.
  • a plurality of fastening holes Ata are provided on the inner peripheral portion of the first disc BDA so that the first disc BDA may be assembled to the hat member HTB.
  • the fastening holes Ata are through holes.
  • An elongated protrusion Fna (referred to as a "first fin portion”) is provided on the first back surface Mab of the first disc BDA.
  • the first back surface Mab (outer side flat surface) is a flat surface on the opposite side (back side) to the first sliding surface Maa.
  • the cross-sectional shape of the first fin portion Fna is convex, and a plane Maf (referred to as a "first fin plane") is formed at the tip of the projection.
  • the second disc BDB is a thin-plate shaped member formed in an annular shape.
  • the second disk BDB is in sliding contact with the second friction pad MSB (outer-side friction pad) at the outer peripheral portion of the second sliding surface Mba (outer-side plane).
  • the region sliding with the second friction pad MSB is the “sliding range” of the second disk BDB.
  • a plurality of fastening holes Atb are provided in the inner peripheral portion of the second disc BDB so that the second disc BDB is assembled to the hat member HTB.
  • an elongated protrusion (second fin portion) Fnb is provided on a plane (inner side plane, second back surface Mbb) opposite to the second sliding surface Mba (on the back side).
  • the cross-sectional shape of the second fin portion Fnb is convex, and a plane (second fin plane) Mbf is formed at the tip of the protrusion.
  • the first fin portion Fna and the second fin portion Fnb are mirror symmetric.
  • Mirror symmetry is also referred to as “mirror symmetry”, which means that the mirror image with respect to a certain reflection plane matches the original figure. For example, if the shape of the planar figure is mirror-symmetrical (mirror-symmetrical), the planar figure is axisymmetric.
  • the hat member HTB is a bottomed cylindrical member extending in the rotational axis direction Jwh of the brake disc (the same as the rotational axis of the wheel WH).
  • the hat member HTB has a flange portion Fln at the outer peripheral portion Mht.
  • a hub unit HUB is provided inside the cylinder of the hat member HTB.
  • a plurality of mounting holes Awh (through holes) are provided at the bottom of the hat member HTB.
  • the hub bolt HBL of the hub unit HUB penetrates the mounting hole Awh and is clamped by the wheel nut WNT across the wheel disc portion of the wheel WH. That is, the hub unit HUB, the hat member HTB, and the wheel WH are integrally coupled by the hub bolt HBL and the wheel nut WNT.
  • an aluminum alloy may be employed as the hat member HTB.
  • the inner peripheral surface Mha of the first disk BDA and the inner peripheral surface Mhb of the second disk BDB are fitted to the cylindrical outer peripheral surface Mht of the hat member HTB with a slight gap. Positioning can be easily performed by fitting the outer peripheral surface Mht of the hat member HTB and the inner peripheral surfaces Mha and Mhb of the first and second disks BDA and BDB in co-tightening by the fastening member TKB.
  • the flange portion Fln of the hat member HTB is provided with a plurality of fastening holes Ath (through holes) so that the first disc BDA and the second disc BDB can be assembled.
  • the fastening member TKB penetrates the fastening hole Ath of the hat member HTB, the fastening hole Ata of the first disc BDA, and the fastening hole Atb of the second disc BDB. Then, these three members HTB, BDA, and BDB are fastened by the fastening member TKB at a portion on the inner circumferential side (side close to the rotation axis Jwh) than the sliding range.
  • the fastening member TKB is a caulking member (for example, a rivet, a grommet), and the ends thereof are plastically deformed to be fastened together and fixed.
  • the first fin portion Fna of the first disc BDA and the second fin portion Fnb of the second disc BDB are butted in the same plane Mms. That is, the first fin plane Maf and the second fin plane Mbf, which are in a mirror symmetry relationship, are fixed so that their positions are matched and abut (see BB cross section).
  • the contact portion between the first fin plane Maf and the second fin plane Mbf is referred to as “abutment plane Mms”.
  • the brake disc BRD is formed as a single disc, in which two discs (a first disc BDA and a second disc BDB) are superimposed, fixed by a hat member HTB and a fastening member TKB.
  • the hole diameter of the fastening holes Ath, Ata, Atb is slightly larger than the diameter of the fastening member TKB at the penetration portion.
  • the first disc BDA and the second disc BDB are in a state in which the hat member HTB is capable of mutually minute displacement. Therefore, friction damping is obtained by minute mutual displacement (minute displacement) in the contact (contact surface Mms) between the first fin plane Maf and the second fin plane Mbf.
  • Cast iron having high damping properties may be adopted for the first and second disks BDA and BDB.
  • the "small displacement” is a displacement larger than the amplitude of the brake noise when the brake noise occurs.
  • the brake noise is at most several tens of ⁇ m. Therefore, the minute displacement is within the range of the play in assembling or the elastic deformation of the member.
  • a gap formed by the first fin portion Fna and the second fin portion Fnb is configured as a vent Avn for heat dissipation.
  • the inner circumferential portion and the outer circumferential portion of the brake disc BRD are penetrated and connected via the vent hole Avn.
  • the vents Avn form a ventilated brake disc.
  • the wheel WH, the hub unit HUB, the hat member HTB, the first disc BDA, and the second disc BDB are coaxially fixed. Therefore, the disc rotation axis Jwh is a rotation axis of the wheel WH, the hub unit HUB, the hat member HTB, the first disc BDA, and the second disc BDB.
  • the tip portions of the first and second fin portions Fna and Fnb are planarized to form first and second fin planes Maf and Mbf. Then, the first fin plane Maf and the second fin plane Mbf are butted to assemble the brake disc BRD.
  • the first fin plane Maf and the second fin plane Mbf are in mirror symmetry (that is, line symmetry) in the contact surface shape.
  • the first fin plane Maf of the first fin portion Fna and the second fin plane Mbf of the second fin portion Fnb are assembled so as to coincide with each other, so a sufficient contact area is secured and substantially uniform.
  • a contact state eg, surface pressure
  • the first disc BDA and the second disc BDB do not perform relative motion, and rotate completely in unison.
  • relative displacement between the first disc BDA and the second disc BDB does not occur.
  • a brake noise occurs in any one of the first disk BDA and the second disk BDB at the time of braking, periodic relative to the disk in which the brake noise does not occur. Displacement occurs.
  • the relative movement of the first disc BDA and the second disc BDB generates a frictional force between the first fin plane Maf and the second fin plane Mbf. This frictional force can suppress the generated brake noise.
  • a large area is secured for the contact surface Mms, a large friction damping acts, and the squeal vibration in the direction perpendicular to the first and second sliding surfaces Maa and Mba is effectively suppressed. .
  • the vibration suppression effect is applied to the squeal vibration (that is, movement vibration parallel to the sliding surfaces Maa and Mba) without the relative movement (minute displacement) of the first and second sliding surfaces Maa and Mba. It may be lower.
  • the heights of the first and second fin portions Fna and Fnb that is, the heights of the protrusions constituting the vent Avn are, for example, approximately “1: 2”) , Disc thickness
  • the vibration suppressing effect can be obtained also against the squeal vibration parallel to the sliding surfaces Maa and Mba.
  • the first disc BDA and the second disc BDB have different vibration characteristics (for example, natural frequency) so that the brakes do not occur simultaneously. Therefore, when a brake noise occurs in any one of the first disk BDA and the second disk BDB, amplification of vibration by the other disk (ie, resonance phenomenon) is avoided. .
  • the whole of the two disks BDA, BDB can be made mirror-symmetrically. Even in the case of the left and right wheels WH having different rotational directions, the brake disc BRD can be configured by the combination of the two mirror-symmetrical discs BDA and BDB without increasing the number of parts.
  • the first and second disks BDA and BDB are mirror symmetric, the difference in cooling performance between the first and second disks BDA and BDB is slight.
  • First disk BDA will be described with reference to the front view and the cross-sectional view of FIG.
  • the first fin portion Fna and the boss portion Bsa protrude from the surface Mab (rear surface) opposite to the first sliding surface Maa.
  • a fastening hole Ata is opened in the boss Bsa.
  • the heights of the fin portion Fna and the boss portion Bsa are aligned by machining.
  • the first fin plane Maf and the boss plane Mbs are in the same plane parallel to the first sliding surface Maa, and then one of cutting, grinding, and polishing is performed. It is processed by at least one method.
  • the second disc BDB is also finished by machining (at least one of cutting, grinding and polishing) after being cast. It is relatively easy to form the first and second fin planes Maf and Mbf parallel to the first and second sliding surfaces Maa and Mba with high precision by employing machining. .
  • the first fin portion Fna has a spiral shape (a so-called curve vane type). Specifically, the first fin portion Fna is radially extended at the inner peripheral portion of the first disc BDA, and gradually approaches the forward direction of the brake disc BRD (closer to the forward direction of the vehicle) as it gets closer to the outer peripheral portion. ) It is inclined in the opposite direction to Dfw (see front view). By rotating the spiral shaped first fin portion Fna, the brake disc BRD can smoothly discharge the air from the central portion to the outer peripheral portion, and the cooling performance can be improved.
  • the second fin portion Fnb of the second disk BDB is formed in mirror symmetry (mirror symmetry) with the first fin portion Fna so as to coincide with the first fin portion Fna. Therefore, the first fin plane Maf of the first fin portion Fna and the second fin plane Mbf of the second fin portion Fnb are in a line symmetrical relationship in the plane shape.
  • first fin portion Fna a straight type having a linear shape (that is, a shape extended in the radial direction without being inclined in the forward direction Dfw) may be employed instead of the curve vane type fin.
  • the shape of the straight first fin portion Fna is also determined so as to coincide with the second fin portion Fnb.
  • a "core” is a sand mold which inserts in a casting_mold
  • the efficiency of casting can be improved, and it is not necessary to consider the core strength in casting (in other words, the core strength and the shapes of the first and second fin portions Fna and Fnb)
  • the shape of the fin portion Fna, Fnb can be optimized only for the cooling property.
  • vents Avn having a finer shape may be formed to improve the cooling performance.
  • the first fin plane Maf of the first disk BDA is machined (for example, shaving, polishing) so as to be parallel to the first sliding surface Maa with respect to the first sliding surface Maa.
  • the second fin plane Mbf of the second disk BDB is shaped by machining so as to be parallel to the second sliding surface Mba with reference to the second sliding surface Mba.
  • the first disc BDA and the second disc BDB are fixed by the hat member HTB and the fastening member TKB so that the first fin plane Maf and the second fin plane Mbf are in contact with each other.
  • the two discs BDA, BDB are not butted against one another in the part of the groove. That is, the first fin plane Maf of the first fin portion Fna and the second back surface Mbb of the second disk BDB (the back side surface of the second sliding surface Mba) are in surface contact. For this reason, a sufficient contact area and uniform contact surface pressure can be ensured, and the effect of friction damping can be exhibited (see DD cross-sectional view). As a result, the same brake noise suppression effect as described above is exhibited.
  • a gap between the first fin portion Fna of the first disc BDA and the second back surface Mbb of the second disc BDB functions as the vent hole Avn.
  • the second disc BDB may be manufactured by adopting an iron plate (for example, a steel plate) and pressing it.
  • the iron plate does not have to be newly machined for assembly of the brake disc BRD because the parallelism between the two planes is secured at the time of material production.
  • the first disc BDA may be flat and the second disc BDB may be shaped so as to have the second fin portion Fnb.
  • the second fin plane Mbf of the second fin portion Fnb is in surface contact with the first back surface Mab (the back surface of the first sliding surface Maa), and exhibits a friction damping effect. Even in this case, the same brake squeak suppression effect is exhibited.
  • each of the first and second disks BDD and BDE has a flat plate shape, and the intermediate disk BDC as the third annular member is provided between the first disk BDD and the second disk BDE.
  • the intermediate disk BDC as the third annular member is provided between the first disk BDD and the second disk BDE.
  • the first and second disks BDD and BDE are attached to the hat member HTB by the fastening member TKB.
  • the shape and mounting of each member will be briefly described with reference to the EE cross-sectional view.
  • the first disc BDD is a disc member formed in an annular shape.
  • the first disc BDD is in sliding contact with the first friction pad MSA (inner side friction pad) at the outer peripheral portion of the first sliding surface Mda.
  • the region sliding with the first friction pad MSA is the “sliding range” of the first disk BDD.
  • the plane of the opposite side (back side) to the first sliding surface Mda is the first back surface Mdb.
  • a plurality of fastening holes Atd are provided in the inner peripheral portion of the first disc BDD.
  • the second disc BDE is a thin-plate shaped member formed in an annular shape.
  • the second disk BDE is in sliding contact with the second friction pad MSB (outer side friction pad) at the outer peripheral portion of the second sliding surface Mea.
  • the region sliding with the second friction pad MSB is the “sliding range” of the second disk BDE.
  • a plane on the opposite side (back side) to the second sliding surface Mea is a second back surface Meb.
  • a plurality of fastening holes Ate are provided in the inner peripheral portion of the second disk BDE.
  • the first and second disks BDD and BDE can be produced by press-forming an iron plate (for example, a steel plate). As described above, the iron plate does not need to be newly machined for assembly of the brake disc BRD, since the parallelism of the two planes is secured at the time of material production.
  • the hat member HTB is integrally fixed to the hub unit HUB and the wheel WH by the hub bolt HBL and the wheel nut WNT.
  • the inner peripheral surface Mhd of the first disk BDD, the inner peripheral surface Mhe of the second disk BDE, and the inner peripheral surface Mhc of the intermediate disk BDC are fitted to the cylindrical outer peripheral surface Mht of the hat member HTB with a slight gap.
  • the fastening member TKB eg, caulking member.
  • the fastening portion by the fastening member TKB is on the inner peripheral side (side closer to the rotation axis Jwh) than the above-mentioned sliding range.
  • the intermediate disk BDC is provided between the first disk BDD and the second disk BDE so as to be sandwiched between the first disk BDD and the second disk BDE.
  • Grooves (concave portions) Zmd and Zme are alternately formed on both surfaces Mcd and Mce (planes in contact with the first and second disks BDD and BDE) of the intermediate disk BDC. That is, the first groove portion Zmd is provided in the first contact surface Mcd in contact with the first sliding surface Mda of the first disk BDD.
  • a second groove Zme is provided on the second contact surface Mce in contact with the second sliding surface Mea of the second disc BDE. Then, the first groove portion Zmd and the second groove portion Zme are alternately provided on the front and back of the intermediate disk BDC.
  • the first and second groove portions Zmd and Zme of the intermediate disk BDC form the vent holes Avn when the brake disk BRD is assembled.
  • the first disk BDD, the intermediate disk BDC, and the second disk BDE are stacked and fixed. Therefore, the first rear surface Mdb of the first disk BDD and the first contact surface Mcd of the intermediate disk BDC are in surface contact in a state where microdisplacement is possible.
  • the second back surface Meb of the second disk BDE and the second contact surface Mce of the intermediate disk BDC are in surface contact with each other in a state in which small displacement is possible.
  • the plane in which the first back surface Mdb contacts the first contact surface Mcd, and the plane in which the second back surface Meb contacts the second contact surface Mce are the contact surfaces Mms.
  • First and second groove portions Zmd and Zme are provided on both surfaces (first and second contact surfaces) Mcd and Mce of the intermediate disk BDC.
  • the first and second grooves Zmd and Zme function as the vents Avn. That is, the first and second groove portions Zmd and Zme are extended from the inner circumferential portion to the outer circumferential portion of the intermediate disk BDC.
  • the first and second grooves Zmd and Zme are first manufactured by casting. Then, after casting, machining (for example, cutting such as cutting or grinding) is applied to the top surfaces Mcd and Mce of the convex portions that constitute the groove. By the machining, highly accurate parallel first and second contact surfaces Mcd and Mce can be easily formed. For this reason, friction damping can be effectively ensured.
  • machining for example, cutting such as cutting or grinding
  • the shapes of the first and second groove portions Zmd, Zme ie, the fin shape
  • the first and second groove portions Zmd and Zme are alternately provided on both surfaces (first and second contact surfaces) Mcd and Mce of the intermediate disk BDC, but the groove portions on one of the surfaces may be omitted.
  • the surface on the side where the groove is omitted is a uniform plane.
  • the planes Maf, Mbf, Mcd, and Mce of the disc members BDA, BDB, and BDC constituting the vent hole Avn are machined (cutting, grinding, and polishing Manufactured by at least one of Therefore, each of the planes Maf, Mbf, Mcd, and Mce is flat, and sufficient parallelism is ensured with respect to the sliding surfaces Maa, Mba, Mda, and Mea.
  • the contact surface Mms is constituted by the highly accurate planes Maf, Mbf, Mcd, and Mce, an area that can be used for friction damping is sufficiently secured, and a uniform contact state can be obtained. As a result, the friction noise can effectively suppress the brake noise.
  • the bonding between the first disc BDA, BDD and the second disc BDB, BDE is exemplified by caulking.
  • a screw fastening member may be employed instead of the caulking member.
  • welding for example, spot welding
  • a disc spring or the like may be added to the fastening portion in order to keep the fastening axial force between the disks in an appropriate range.
  • the fastening hole Ath of the hat member HTB may be formed as a long hole shape.
  • the heat generated at the time of braking thermally expands the disc members BDA, BDB, BDD, and BDE.
  • the inner peripheral surfaces Mha, Mhb, Mhd, and Mhe of the respective members expand in diameter, they can be separated from the outer peripheral surface Mht of the hat member HTB by the long hole-shaped fastening holes Ath. As a result, deformation of the hat member HTB can be suppressed.
  • the hat member HTB and the disk member are configured as separate members.
  • One of the two disks and the hat can be integrally formed. Then, the other of the two disks is fastened at the hat portion in a slightly displaceable state.
  • the inner brake pad located on the side farther from the wheel disc portion of the wheel WH is the first friction pad MSA, and the side closer to the wheel disc portion of the wheel WH
  • the outer brake pad positioned at the outer side in the lateral direction of the vehicle is used as the second friction pad MSB.
  • the disk members on the inner side are made the first disks BDA and BDD, and the disk members on the outer side (the outer side in the left and right direction of the vehicle) .
  • the disk members on the inner side are made the first disks BDA and BDD
  • the disk members on the outer side the outer side in the left and right direction of the vehicle.
  • the one related to the inner side may be the second friction pad and the second disk
  • the one related to the outer side may be the first friction pad and the first disk.

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

Abstract

The brake disc according to the present invention is sandwiched by two friction pads MSA, MSB, and thereby generates a braking force on a wheel. The brake disc is provided with a first disc for making sliding contact with one of the two friction pads on a first sliding surface, and a second disc for making sliding contact with the other of the two friction pads on a second sliding surface. The first disc has a plurality of first fin parts which are narrow projections on a first back surface on the reverse side from the first sliding surface. The second disc has a plurality of second fin parts which are mirror-symmetrical to the first fin parts and are narrow projections on a second back surface on the reverse side from the second sliding surface. "First fin flat surfaces formed parallel to the first sliding surface in the first fin parts" and "second fin flat surfaces formed parallel to the second sliding surface in the second fin parts" are fixed so as to be in surface contact with each other.

Description

ブレーキディスクbrake disc
 本発明は、ブレーキディスクに関する。 The present invention relates to a brake disc.
 特許文献1には、「異音の発生のないブレーキディスクを得ること」を目的に、「互いに異なる振動数の少なくとも2枚のディスクを重合し、両者を相互間に自由度を与え得る如く分散した複数個所で互いに結着する」ことが記載されている。具体的には、2枚のディスクが、ブレーキパッドと摺動する部分でリベットによって、一体的に結着されることが記載されている。即ち、特許文献1に記載のブレーキディスクでは、摩擦減衰によってブレーキ鳴きが低減される。 According to Patent Document 1, for the purpose of “obtaining a brake disc free of noise generation”, “at least two discs of different frequencies are superposed and dispersed so that both can give freedom to each other. It is described that "we bond together in multiple places." Specifically, it is described that two disks are integrally joined by a rivet at a portion sliding with the brake pad. That is, in the brake disc described in Patent Document 1, the brake noise is reduced by friction damping.
 特許文献2には、「内部に通気孔(ベンチレーション)を有するベンチレーテッドローターにおけるブレーキノイズを低減する」ことを目的に、「ローターを片面が夫々摺動面を形成する板状体に2分割し、これら板状体の各摺動面の反対側にフィンを交互に突設すると共にこれらフィンの先端面に夫々ダンピング材を取付け、これら板状体を該ダンピング材で互に接合してボルトナットで組付け、内部にベンチレーションを形成せしめたこと特徴とするディスクブレーキ用ローター」について記載されている。即ち、特許文献2に記載のブレーキディスクでは、ダンピング材の減衰効果によってブレーキ鳴きが低減される。 According to Patent Document 2, for the purpose of "reducing brake noise in a ventilated rotor having vents (ventilation) inside", the rotor may be a plate-like member having a sliding surface on one side. Divide and project fins alternately on the opposite side of each sliding surface of these plate-like bodies, attach a damping material to each of the tip faces of these fins, and join these plate-like bodies to each other with the damping material A disk brake rotor is described, which is characterized in that it is assembled with a bolt and a nut and ventilation is formed inside. That is, in the brake disc described in Patent Document 2, the brake noise is reduced by the damping effect of the damping material.
 特許文献3には、「環状部材用キャビティの軸心近傍から放射状に注湯するセンターゲート形式の鋳型を使用した鋳造における製品品質低下を回避する型具構造並びに鋳造方法を提供する」ことを目的に、「型具構造は、少なくとも1つの中子12aと中子12aを挟んで配置される少なくとも一対の型12bとから構成され、環状部材を鋳造するためのキャビティを有し、該環状部材の軸心近傍に湯口19並びに湯路18を設けて湯を半径方向に放射状に拡散させて鋳込むよう形成される。一対の型12bは、外周面の全周から軸方向の一方もしくは双方に延びる鍔部15を有し、中子12aの外周の周囲を鍔部15で囲って中子12aの膨張による変形、崩壊を阻止するよう構成される。キャビティから型12bの外周面に抜けるガス抜き溝25を、中子12aと型12bの境界面、鍔部15の当接面に形成し、キャビティ内のガスを型の外部へ放出するよう構成される」ことが記載されている。 Patent Document 3 aims to “provide a mold structure and a casting method for avoiding deterioration in product quality in casting using a center gate type mold poured radially from the vicinity of the axial center of the cavity for annular member”. “The mold structure comprises at least one core 12a and at least one pair of molds 12b disposed sandwiching the core 12a, having a cavity for casting an annular member, and A spout 19 and a tap 18 are provided in the vicinity of the axial center so that the molten metal is diffused radially and poured in. The pair of molds 12 b extends in one or both of the axial direction from the entire circumference of the outer peripheral surface It has a collar portion 15 and is configured to surround the outer periphery of the core 12a with the collar portion 15 to prevent deformation and collapse due to expansion of the core 12a.Gas that escapes from the cavity to the outer peripheral surface of the mold 12b The come grooves 25, the boundary surface of the core 12a and the mold 12b, is formed on the contact surface of the flange 15, has been described is constructed "it to emit gas in the cavity to mold the outside.
 特許文献1に記載されるブレーキディスクでは、ブレーキパッド(「摩擦パッド」ともいう)と接触する部分にて、多数のリベットにて、2枚のディスクが固定される。この場合、リベット用の貫通孔には、摩擦パッドの摩耗粉が蓄積されるため、この摩耗粉に起因する異音(ブレーキ鳴き)が懸念される。さらに、ブレーキディスクには、冷却性能が要求されるため、通気孔を有した構造が必要とされる。 In the brake disc described in Patent Document 1, two discs are fixed by a large number of rivets at a portion in contact with a brake pad (also referred to as a "friction pad"). In this case, since the wear powder of the friction pad is accumulated in the through holes for rivets, there is a concern that noise (brake noise) caused by the wear powder. Furthermore, since the brake disk is required to have a cooling performance, a structure having a vent is required.
 上記事項を勘案して、特許文献1に記載のブレーキディスク構成(「摩擦減衰構成」と称呼する)を、特許文献2に記載のブレーキディスクに適用して、摩擦減衰による鳴き抑制効果を獲得することを試みる。しかしながら、特許文献2に記載の構成では、隣接する凸部が存在するため、機械加工によって、凹部の深さを揃えることが困難である。従って、組み付けられた後に、凸部と凹部との十分な接触が確保されず、摩擦減衰の効果が得られ難い。 Taking the above matters into consideration, the brake disc configuration described in Patent Document 1 (referred to as “frictional damping configuration”) is applied to the brake disc described in Patent Document 2 to obtain a noise suppressing effect by friction damping. Try that. However, in the configuration described in Patent Document 2, it is difficult to make the depths of the recesses uniform by machining because adjacent protrusions exist. Therefore, after being assembled, sufficient contact between the convex portion and the concave portion is not ensured, and it is difficult to obtain the effect of friction damping.
 このことについて、図6を参照して説明する。図6は、第1ディスクD1と第2ディスクD2との凹凸部が交互にかみ合うように接触させた場合における、ディスクの回転軸Jwhに対する垂直方向視の部分断面図である。凹部の深さ(長さ)にバラツキがある場合、例えば、X部で示すように、第1ディスクD1の凸部と、第2ディスクD2の凹部とが接触すると、他の部位での接触が阻害される。即ち、Y部、Z部で図示するように、凸部と凹部との間には隙間が生じる。該隙間がダンピング材で埋められる場合には、この隙間は課題とはならない。 This will be described with reference to FIG. FIG. 6 is a partial cross-sectional view as viewed in the direction perpendicular to the rotational axis Jwh of the disks when the uneven portions of the first disk D1 and the second disk D2 are brought into contact with each other so as to be engaged alternately. When there is variation in the depth (length) of the recess, for example, as shown by the X portion, when the protrusion of the first disc D1 comes in contact with the recess of the second disc D2, the contact at the other part is It is inhibited. That is, as illustrated in the Y portion and the Z portion, a gap is generated between the convex portion and the concave portion. If the gap is filled with damping material, this gap is not an issue.
 しかし、2つのディスクの面接触において、摩擦減衰を得ようとすると、該隙間が問題となってくる。これは、接触面積が大であるほど、摩擦減衰の効果が大きいことに因る。従って、特許文献2に記載の構成(即ち、フィンを交互に突接する構成)を採用したとしても、凹部深さの均一化が困難であるため、摩擦減衰の効果は得られ難い。 However, in order to obtain friction damping in the surface contact of two disks, the gap becomes a problem. This is because the larger the contact area, the greater the effect of friction damping. Therefore, even if the configuration described in Patent Document 2 (that is, the configuration in which the fins are alternately abutted) is employed, it is difficult to make the recess depth uniform, so it is difficult to obtain the effect of friction damping.
 特許文献3は、ベンチレーテッドディスクを一体的に鋳造する方法の例である。ベンチレーテッド構造を実現するために、内周から外周にわたる中子を要する。中子自体の強度を確保するため、余り細い中子は製作が不可能である。従って、ブレーキディスクの冷却性能を確保するため、通気孔(ベンチレーテッド穴)の形状(数、幅等)が最適化され難い。つまり、中子強度と通気孔形状との間には、トレードオフ関係が存在するため、中子強度の確保には、通気孔形状において、或る程度の譲歩が必要となる。 Patent Document 3 is an example of a method of integrally casting a ventilated disc. In order to realize a ventilated structure, a core is required from the inner circumference to the outer circumference. In order to secure the strength of the core itself, it is impossible to make a core that is too thin. Therefore, it is difficult to optimize the shape (number, width, etc.) of the vent holes (vented holes) in order to ensure the cooling performance of the brake disc. That is, since there is a trade-off relationship between the core strength and the vent shape, securing of the core strength requires some degree of compromise in the vent shape.
 一般的なブレーキディスクには、ブレーキ鳴き性能と冷却性能とが、高度に適正化されたものが望まれている。即ち、ブレーキディスクとして、摩擦減衰効果が確保され、且つ、通気孔の形状(数、幅等)に設計自由度が高い構造が切望されている。 It is desirable that the brake noise performance and the cooling performance be highly optimized for general brake discs. That is, as a brake disc, a structure that has a frictional damping effect secured and a high degree of freedom in design in the shape (number, width, etc.) of the vents is desired.
特公昭50-035179号公報Japanese Patent Publication No. 50-035179 特開昭58-072735号公報JP-A-58-072735 特開2013-052436号公報JP, 2013-052436, A
 本発明の目的は、積層構成のブレーキディスクにおいて、簡単な構造で効果的に摩擦減衰が得られ、且つ、冷却性能が高いものを提供することである。 SUMMARY OF THE INVENTION An object of the present invention is to provide a brake disc having a laminated structure, which can effectively obtain friction damping and has high cooling performance with a simple structure.
 本発明に係るブレーキディスク(BRD)は、車両の車輪(WH)に固定され、2つの摩擦パッド(MSA、MSB)によって挟まれることによって、前記車輪(WH)に制動力を発生する。ブレーキディスク(BRD)は、前記2つの摩擦パッドのうちの一方(例えば、MSA)と、第1摺動面(Maa)にて摺接する第1ディスク(BDA)と、前記2つの摩擦パッドのうちの他方(例えば、MSB)と、第2摺動面(Mba)にて摺接する第2ディスク(BDB)と、を備える。 A brake disc (BRD) according to the present invention is fixed to a wheel (WH) of a vehicle and generates braking force on the wheel (WH) by being sandwiched by two friction pads (MSA, MSB). The brake disc (BRD) includes one of the two friction pads (for example, MSA), a first disc (BDA) in sliding contact with the first sliding surface (Maa), and the two friction pads. And the second disk (BDB) in sliding contact with the second sliding surface (Mba).
 本発明に係る第1のブレーキディスク(BRD)では、前記第1ディスク(BDA)は前記第1摺動面(Maa)の反対側である第1背面(Mab)に複数の細長い突起部である第1フィン部(Fna)を有し、前記第2ディスク(BDB)は前記第2摺動面(Mba)の反対側である第2背面(Mbb)に複数の細長い突起部であり、前記第1フィン部(Fna)と鏡面対称である第2フィン部(Fnb)を有し、「前記第1フィン部(Fna)において前記第1摺動面(Maa)に平行に形成された第1フィン平面(Maf)」と「前記第2フィン部(Fnb)において前記第2摺動面(Mba)に平行に形成された第2フィン平面(Mbf)」とが、面接触するように固定される。 In the first brake disc (BRD) according to the present invention, the first disc (BDA) is a plurality of elongated protrusions on a first back surface (Mab) opposite to the first sliding surface (Maa) The first disk has a first fin portion (Fna), and the second disk (BDB) has a plurality of elongated protrusions on a second back surface (Mbb) opposite to the second sliding surface (Mba), A first fin formed in parallel to the first sliding surface (Maa) in the first fin portion (Fna), having a first fin portion (Fna) and a second fin portion (Fnb) that is mirror-symmetrical to the first fin portion (Fna); The flat surface (Maf) and the “second fin surface (Mbf) formed parallel to the second sliding surface (Mba) in the second fin portion (Fnb)” are fixed in surface contact with each other. .
 本発明に係る第2のブレーキディスク(BRD)では、前記第1ディスク(BDA)は前記第1摺動面(Maa)の反対側である第1背面(Mab)に複数の細長い突起部である第1フィン部(Fna)を有し、「前記第1フィン部(Fna)において前記第1摺動面(Maa)に平行に形成された第1フィン平面(Maf)」と「前記第2ディスク(BDB)の前記第2摺動面(Mba)の反対側である第2背面(Mbb)」とが、面接触するように固定される。 In the second brake disc (BRD) according to the present invention, the first disc (BDA) is a plurality of elongated protrusions on a first back surface (Mab) opposite to the first sliding surface (Maa) “A first fin plane (Maf) formed in parallel to the first sliding surface (Maa) in the first fin portion (Fna)” and “the second disc (the second disk) having the first fin portion (Fna) The second back surface (Mbb) opposite to the second sliding surface (Mba) of (BDB) is fixed in surface contact.
 本発明に係る第3のブレーキディスク(BRD)は、前記2つの摩擦パッドのうちの一方(例えば、MSA)と、第1摺動面(Mda)にて摺接する第1ディスク(BDD)と、前記2つの摩擦パッドのうちの他方(例えば、MSB)と、第2摺動面(Mea)にて摺接する第2ディスク(BDE)と、前記第1ディスク(BDD)と前記第2ディスク(BDE)との中間に設けられる中間ディスク(BDC)と、を備える。本発明に係るブレーキディスク(BRD)では、前記中間ディスク(BDC)の2つの平面は平行であって、前記2つの平面のうちの少なくとも一方の平面に複数の細長い溝(Zma、Zmb)が成形され、前記第1ディスク(BDD)と前記中間ディスク(BDC)とが面接触し、前記第2ディスク(BDE)と前記中間ディスク(BDC)とが面接触するよう固定される。 A third brake disc (BRD) according to the present invention comprises one of the two friction pads (for example, MSA) and a first disc (BDD) in sliding contact with the first sliding surface (Mda). The other of the two friction pads (for example, MSB), the second disc (BDE) in sliding contact with the second sliding surface (Mea), the first disc (BDD), and the second disc (BDE) And an intermediate disk (BDC) provided in between. In the brake disc (BRD) according to the present invention, the two planes of the intermediate disc (BDC) are parallel, and a plurality of elongated grooves (Zma, Zmb) are formed in at least one of the two planes. The first disc (BDD) and the intermediate disc (BDC) are in surface contact with each other, and the second disc (BDE) and the intermediate disc (BDC) are in surface contact with each other.
 ディスクの加工において、凹部の加工精度(特に、溝の深さ)を確保することは、相対的に困難であり、凸部の加工精度を確保することは、相対的に容易である。上記構成によれば、2つのディスクの組み付けにおいて、一方のディスクの溝部(凹部)と、他方のディスクのフィン部(凸部)とが、突き合わせられて組み付けられることは採用されない。凸部の先端平面等が、鏡面対称の凸部の先端平面、又は、平板に面接触されて組み付けられる。このため、十分な接触面積が確保されるとともに、略均一な接触状態が得られる。ブレーキディスクの積層構成(摩擦減衰構成)が簡素化され、十分な摩擦減衰の効果が確保され得る。 In the processing of the disk, it is relatively difficult to secure the processing accuracy (in particular, the depth of the groove) of the recess, and it is relatively easy to secure the processing accuracy of the protrusion. According to the above configuration, in assembling two disks, it is not adopted that the groove (concave portion) of one disk and the fin (convex) of the other disk are butted and assembled. The tip end surface or the like of the convex portion is assembled in a surface contact with the tip end surface of the mirror-symmetrical convex portion or a flat plate. Therefore, a sufficient contact area is secured, and a substantially uniform contact state can be obtained. The stacked construction of the brake disc (friction damping construction) can be simplified and a sufficient friction damping effect can be ensured.
本発明に係るブレーキディスクBRDの第1の実施形態を説明するための正面図、及び、断面図である。FIG. 1 is a front view and a cross-sectional view for describing a first embodiment of a brake disk BRD according to the present invention. 第1ディスクBDAの形状を説明するための正面図、及び、断面図である。It is the front view and cross-sectional view for demonstrating the shape of 1st disc BDA. 本発明に係るブレーキディスクBRDの第1の実施形態の変形例を説明するための断面図である。FIG. 7 is a cross-sectional view for explaining a modification of the first embodiment of the brake disk BRD according to the present invention. 本発明に係るブレーキディスクBRDの第2の実施形態を説明するための正面図、及び、断面図である。FIG. 7 is a front view and a cross-sectional view for describing a second embodiment of a brake disk BRD according to the present invention. 中間ディスクBDCを説明するための正面図、及び、部分側面図である。They are the front view for demonstrating middle disc BDC, and a partial side view. 従来技術を応用して摩擦減衰を得ようとする場合の課題を説明するため部分断面図である。It is a fragmentary sectional view in order to explain the subject in the case of trying to obtain friction damping by applying a prior art.
<本発明に係るブレーキディスクBRDの第1の実施形態>
 図1の正面図、及び、断面図を参照して、本発明に係るブレーキディスクBRDの第1の実施形態について説明する。以下の説明で、同一の記号が付された構成部材、及び、部位は、同一の機能を発揮するものである。従って、重複説明は、省略されることがある。
<First Embodiment of Brake Disc BRD According to the Present Invention>
A first embodiment of a brake disc BRD according to the present invention will be described with reference to the front view and the cross-sectional view of FIG. In the following description, the component members and the parts to which the same symbol is attached perform the same function. Therefore, duplicate explanations may be omitted.
 ブレーキディスクBRDは、車両において車輪WHを制動するために採用されるディスク型制動装置の摩擦円盤である。ブレーキディスクBRDは、2つの摩擦パッドMSA、MSBによって挟まれて、車輪WHに、一体となって回転するよう固定される。 The brake disc BRD is a friction disc of a disc brake employed for braking the wheel WH in a vehicle. The brake disc BRD is sandwiched between the two friction pads MSA, MSB and fixed to the wheel WH so as to rotate together.
 制動時に、ブレーキディスクBRDは、第1、第2摩擦パッドMSA、MSBによって挟み込まれるように押圧力を受ける。この際の押圧力によって、第1、第2摩擦パッドMSA、MSBとブレーキディスクBRDとが摺動する際に摩擦力が生じる。この摩擦力によって、車輪WHは制動力を発生する。ブレーキディスクBRDは、第1ディスクBDA、第2ディスクBDB、ハット部材HTB、及び、締結部材TKBにて構成される。 At the time of braking, the brake disc BRD receives a pressing force so as to be sandwiched by the first and second friction pads MSA and MSB. The pressing force at this time causes a frictional force when the first and second friction pads MSA, MSB and the brake disc BRD slide. The wheel WH generates a braking force by this frictional force. The brake disc BRD includes a first disc BDA, a second disc BDB, a hat member HTB, and a fastening member TKB.
 A-A断面図を参照して、各部材の形状、及び、取り付けについて説明する。第1ディスクBDAは、環状に成形された円盤部材である。車輪WH(タイヤ)が制動力を発生するよう、第1ディスクBDAは、第1摺動面Maa(インナ側平面)の外周部分にて、第1摩擦パッドMSA(インナ側摩擦パッド)と摺接する。第1摺動面Maaにおいて、第1摩擦パッドMSAと摺動する領域が、第1ディスクBDAの「摺動範囲」である。第1ディスクBDAがハット部材HTBに組み付けられるよう、第1ディスクBDAの内周部分には複数の締結孔Ataが設けられている。ここで、締結孔Ataは貫通孔である。 The shape and mounting of each member will be described with reference to the AA sectional view. The first disk BDA is a circular disk member. The first disc BDA is in sliding contact with the first friction pad MSA (inner side friction pad) at the outer peripheral portion of the first sliding surface Maa (inner side flat surface) so that the wheel WH (tire) generates a braking force. . In the first sliding surface Maa, the region sliding with the first friction pad MSA is the “sliding range” of the first disc BDA. A plurality of fastening holes Ata are provided on the inner peripheral portion of the first disc BDA so that the first disc BDA may be assembled to the hat member HTB. Here, the fastening holes Ata are through holes.
 第1ディスクBDAの第1背面Mabに、細長い突起部Fna(「第1フィン部」という)が設けられる。第1背面Mab(アウタ側平面)は、第1摺動面Maaとは反対側(裏側)の平面である。第1フィン部Fnaの断面形状は凸型であり、突起先端部分に平面Maf(「第1フィン平面」という)が形成されている。 An elongated protrusion Fna (referred to as a "first fin portion") is provided on the first back surface Mab of the first disc BDA. The first back surface Mab (outer side flat surface) is a flat surface on the opposite side (back side) to the first sliding surface Maa. The cross-sectional shape of the first fin portion Fna is convex, and a plane Maf (referred to as a "first fin plane") is formed at the tip of the projection.
 第2ディスクBDBは、第1ディスクBDAと同様に、環状に成形された薄板形状の部材である。第2ディスクBDBは、第2摺動面Mba(アウタ側平面)の外周部分にて、第2摩擦パッドMSB(アウタ側摩擦パッド)と摺接する。第2摺動面Mbaにおいて、第2摩擦パッドMSBと摺動する領域が、第2ディスクBDBの「摺動範囲」である。第1ディスクBDAと同様に、第2ディスクBDBがハット部材HTBに組み付けられるよう、第2ディスクBDBの内周部分には、複数の締結孔Atb(貫通孔)が設けられている。 Similar to the first disc BDA, the second disc BDB is a thin-plate shaped member formed in an annular shape. The second disk BDB is in sliding contact with the second friction pad MSB (outer-side friction pad) at the outer peripheral portion of the second sliding surface Mba (outer-side plane). In the second sliding surface Mba, the region sliding with the second friction pad MSB is the “sliding range” of the second disk BDB. Similar to the first disc BDA, a plurality of fastening holes Atb (through holes) are provided in the inner peripheral portion of the second disc BDB so that the second disc BDB is assembled to the hat member HTB.
 第2ディスクBDBにおいても、第2摺動面Mbaとは反対側(裏側)の平面(インナ側平面であり、第2背面Mbb)に、細長い突起部(第2フィン部)Fnbが設けられる。第2フィン部Fnbの断面形状は凸型であり、突起先端部分に平面(第2フィン平面)Mbfが形成されている。ここで、第1フィン部Fnaと第2フィン部Fnb(従って、第1フィン平面Mafと第2フィン平面Mbf)とは鏡面対称である。 Also in the second disk BDB, an elongated protrusion (second fin portion) Fnb is provided on a plane (inner side plane, second back surface Mbb) opposite to the second sliding surface Mba (on the back side). The cross-sectional shape of the second fin portion Fnb is convex, and a plane (second fin plane) Mbf is formed at the tip of the protrusion. Here, the first fin portion Fna and the second fin portion Fnb (thus, the first fin plane Maf and the second fin plane Mbf) are mirror symmetric.
 「鏡面対称」とは、「鏡像対称」とも称呼され、ある鏡映面に関する鏡像が元の図形と一致することを意味する。例えば、平面図形の形状が鏡面対称(鏡像対称)である場合には、該平面図形形状は線対称である。 "Mirror symmetry" is also referred to as "mirror symmetry", which means that the mirror image with respect to a certain reflection plane matches the original figure. For example, if the shape of the planar figure is mirror-symmetrical (mirror-symmetrical), the planar figure is axisymmetric.
 ハット部材HTBは、ブレーキディスクの回転軸方向Jwh(車輪WHの回転軸と同じ)に延びる有底円筒形状の部材である。ハット部材HTBは、外周部Mhtにフランジ部Flnを有する。また、ハット部材HTBの円筒内部には、ハブユニットHUBが設けられる。ハット部材HTBの底部には、複数の取付孔Awh(貫通孔)が設けられる。ハブユニットHUBのハブボルトHBLが、取付孔Awhを貫通し、車輪WHのホイールディスク部を挟んで、ホイールナットWNTにて締め付けられる。即ち、ハブユニットHUB、ハット部材HTB、及び、車輪WHが、ハブボルトHBL、及び、ホイールナットWNTにて一体的に結合される。例えば、ハット部材HTBとして、アルミニウム合金が採用され得る。 The hat member HTB is a bottomed cylindrical member extending in the rotational axis direction Jwh of the brake disc (the same as the rotational axis of the wheel WH). The hat member HTB has a flange portion Fln at the outer peripheral portion Mht. Further, a hub unit HUB is provided inside the cylinder of the hat member HTB. A plurality of mounting holes Awh (through holes) are provided at the bottom of the hat member HTB. The hub bolt HBL of the hub unit HUB penetrates the mounting hole Awh and is clamped by the wheel nut WNT across the wheel disc portion of the wheel WH. That is, the hub unit HUB, the hat member HTB, and the wheel WH are integrally coupled by the hub bolt HBL and the wheel nut WNT. For example, an aluminum alloy may be employed as the hat member HTB.
 第1ディスクBDAの内周面Mha、及び、第2ディスクBDBの内周面Mhbが、ハット部材HTBの円筒状の外周面Mhtに、僅かな隙間をもって嵌め合わされる。締結部材TKBによる共締めに際して、ハット部材HTBの外周面Mhtと、第1、第2ディスクBDA、BDBの内周面Mha、Mhbとが嵌め合わされることによって、位置決めが、容易に成され得る。 The inner peripheral surface Mha of the first disk BDA and the inner peripheral surface Mhb of the second disk BDB are fitted to the cylindrical outer peripheral surface Mht of the hat member HTB with a slight gap. Positioning can be easily performed by fitting the outer peripheral surface Mht of the hat member HTB and the inner peripheral surfaces Mha and Mhb of the first and second disks BDA and BDB in co-tightening by the fastening member TKB.
 ハット部材HTBのフランジ部Flnには、第1ディスクBDA、及び、第2ディスクBDBを組み付けられるよう、複数の締結孔Ath(貫通孔)が設けられる。締結部材TKBは、ハット部材HTBの締結孔Ath、第1ディスクBDAの締結孔Ata、及び、第2ディスクBDBの締結孔Atbを貫通する。そして、締結部材TKBによって、これら3つの部材HTB、BDA、BDBが、上記摺動範囲よりも内周側(回転軸Jwhに近接した側)の部位で締結される。具体的には、締結部材TKBは、かしめ部材(例えば、リベット、グロメット)であり、その端部が塑性変形されることによって、共締めされて固定される。 The flange portion Fln of the hat member HTB is provided with a plurality of fastening holes Ath (through holes) so that the first disc BDA and the second disc BDB can be assembled. The fastening member TKB penetrates the fastening hole Ath of the hat member HTB, the fastening hole Ata of the first disc BDA, and the fastening hole Atb of the second disc BDB. Then, these three members HTB, BDA, and BDB are fastened by the fastening member TKB at a portion on the inner circumferential side (side close to the rotation axis Jwh) than the sliding range. Specifically, the fastening member TKB is a caulking member (for example, a rivet, a grommet), and the ends thereof are plastically deformed to be fastened together and fixed.
 締結部材TKBによる固定において、第1ディスクBDAの第1フィン部Fnaと、第2ディスクBDBの第2フィン部Fnbとが同一平面Mmsで突き合わされる。即ち、鏡面対象の関係にある、第1フィン平面Mafと第2フィン平面Mbfとが、互いの位置が一致されて、当接するように固定される(B-B断面参照)。ここで、第1フィン平面Mafと第2フィン平面Mbfとの接触部が、「当接面Mms」と称呼される。 In fixing by the fastening member TKB, the first fin portion Fna of the first disc BDA and the second fin portion Fnb of the second disc BDB are butted in the same plane Mms. That is, the first fin plane Maf and the second fin plane Mbf, which are in a mirror symmetry relationship, are fixed so that their positions are matched and abut (see BB cross section). Here, the contact portion between the first fin plane Maf and the second fin plane Mbf is referred to as “abutment plane Mms”.
 ブレーキディスクBRDは、2つの円盤(第1ディスクBDA、及び、第2ディスクBDB)が重ね合わされ、ハット部材HTB、及び、締結部材TKBによって固定され、1つの円盤として形成される。締結孔Ath、Ata、Atbの孔径は、貫通部における締結部材TKBの直径に比較し、僅かに大きい。このため、ディスク回転軸Jwh方向に固定された状態において、第1ディスクBDAと第2ディスクBDBとは、ハット部材HTBに対して、相互に微小変位が可能な状態である。従って、第1フィン平面Mafと第2フィン平面Mbfとの接触(当接面Mms)における微小な相互変位(微小変位)によって、摩擦減衰が得られる。第1、第2ディスクBDA、BDBには、制振性が高い鋳鉄が採用され得る。 The brake disc BRD is formed as a single disc, in which two discs (a first disc BDA and a second disc BDB) are superimposed, fixed by a hat member HTB and a fastening member TKB. The hole diameter of the fastening holes Ath, Ata, Atb is slightly larger than the diameter of the fastening member TKB at the penetration portion. For this reason, in the state fixed in the direction of the disc rotation axis Jwh, the first disc BDA and the second disc BDB are in a state in which the hat member HTB is capable of mutually minute displacement. Therefore, friction damping is obtained by minute mutual displacement (minute displacement) in the contact (contact surface Mms) between the first fin plane Maf and the second fin plane Mbf. Cast iron having high damping properties may be adopted for the first and second disks BDA and BDB.
 上記「微小変位」は、ブレーキ鳴きが発生する場合において、ブレーキ鳴きの振幅よりも大きい変位である。ブレーキ鳴きは、大きくても数十μmである。従って、微小変位は組み付けにおけるガタ、或いは、部材の弾性変形の範囲内である。ブレーキ鳴きが発生した場合、第1ディスクBDAと第2ディスクBDBとは互いに、当接面Mmsで任意の方向に擦り合わされる。当接面Mmsには摩擦が存在するため、擦り合わされるときに生じる摩擦減衰によって、ブレーキ鳴きが低減される。 The "small displacement" is a displacement larger than the amplitude of the brake noise when the brake noise occurs. The brake noise is at most several tens of μm. Therefore, the minute displacement is within the range of the play in assembling or the elastic deformation of the member. When a brake noise occurs, the first disc BDA and the second disc BDB are rubbed against each other in an arbitrary direction on the abutment surface Mms. Since friction is present on the abutment surface Mms, the brake noise is reduced by the friction damping that occurs when rubbed together.
 第1フィン部Fnaと第2フィン部Fnbとで形成される隙間が、放熱用の通気孔Avnとして構成される。ブレーキディスクBRDの内周部と外周部とが、通気孔Avnを介して貫通されて繋がれる。通気孔Avnによって、ベンチレーテッド型のブレーキディスクが構成される。 A gap formed by the first fin portion Fna and the second fin portion Fnb is configured as a vent Avn for heat dissipation. The inner circumferential portion and the outer circumferential portion of the brake disc BRD are penetrated and connected via the vent hole Avn. The vents Avn form a ventilated brake disc.
 車輪WH、ハブユニットHUB、ハット部材HTB、第1ディスクBDA、及び、第2ディスクBDBは、同軸に固定される。従って、ディスク回転軸Jwhは、車輪WH、ハブユニットHUB、ハット部材HTB、第1ディスクBDA、及び、第2ディスクBDBの回転軸である。 The wheel WH, the hub unit HUB, the hat member HTB, the first disc BDA, and the second disc BDB are coaxially fixed. Therefore, the disc rotation axis Jwh is a rotation axis of the wheel WH, the hub unit HUB, the hat member HTB, the first disc BDA, and the second disc BDB.
 ディスクの加工において、凹部の加工精度(特に、溝の深さ)を確保することは、相対的に困難である。従って、2つのディスクBDA、BDBの組み付けにおいて、一方のディスクの溝部(凹部)と、他方のディスクのフィン部(凸部)との突き合わせは回避される。図6を参照して説明したように、第1、第2ディスクBDA、BDBの面接触が阻害されるため、凹凸部を組み合わせたディスク組み付けは採用されない。 In disk processing, it is relatively difficult to ensure the processing accuracy of the recess (in particular, the depth of the groove). Therefore, when assembling the two disks BDA and BDB, butt of the groove (recess) of one disk and the fin (convex) of the other disk is avoided. As described with reference to FIG. 6, since the surface contact of the first and second disks BDA and BDB is inhibited, the disk assembly in which the concavo-convex portions are combined is not employed.
 第1、第2フィン部Fna、Fnbの先端部が平面加工されて、第1、第2フィン平面Maf、Mbfが形成される。そして、第1フィン平面Mafと第2フィン平面Mbfとが突き合わされて、ブレーキディスクBRDが組み付けられる。ここで、第1フィン平面Mafと第2フィン平面Mbfとは、その接触面形状において、鏡面対称(即ち、線対称)の関係にある。 The tip portions of the first and second fin portions Fna and Fnb are planarized to form first and second fin planes Maf and Mbf. Then, the first fin plane Maf and the second fin plane Mbf are butted to assemble the brake disc BRD. Here, the first fin plane Maf and the second fin plane Mbf are in mirror symmetry (that is, line symmetry) in the contact surface shape.
 凹部の加工に比較して、凸部の加工精度を確保することは、相対的に容易である。このため、第1フィン部Fnaの第1フィン平面Mafと、第2フィン部Fnbの第2フィン平面Mbfとが合致するように組み付けられるため、十分な接触面積が確保されるとともに、略均一な接触状態(例えば、面圧)が得られる。結果、十分な摩擦減衰の効果が確保され得る。 It is relatively easy to secure the processing accuracy of the convex portion as compared to the processing of the concave portion. For this reason, the first fin plane Maf of the first fin portion Fna and the second fin plane Mbf of the second fin portion Fnb are assembled so as to coincide with each other, so a sufficient contact area is secured and substantially uniform. A contact state (eg, surface pressure) is obtained. As a result, a sufficient friction damping effect can be secured.
 車輪WHが制動力を発生しない非制動時には、第1ディスクBDAと第2ディスクBDBとは、相対的な運動はせず、完全に一体となって回転する。また、制動時であっても、ブレーキ鳴きが発生していない場合、第1ディスクBDAと第2ディスクBDBとの相対変位は発生しない。しかし、制動時において、第1ディスクBDA、及び、第2ディスクBDBのうちの何れか一方のディスクにてブレーキ鳴きが発生すると、ブレーキ鳴きが発生していないディスクとの間で、周期的な相対変位が生じる。第1ディスクBDAと第2ディスクBDBとの相対的な運動によって、第1フィン平面Mafと第2フィン平面Mbfとの間に摩擦力が生じる。この摩擦力によって、発生していたブレーキ鳴きが抑制され得る。特に、当接面Mmsは、広い面積が確保されているため、大きな摩擦減衰が作用し、第1、第2摺動面Maa、Mbaに対して直角方向の鳴き振動は効果的に抑制される。 At the time of non-braking where the wheel WH does not generate a braking force, the first disc BDA and the second disc BDB do not perform relative motion, and rotate completely in unison. In addition, even during braking, when the brake noise does not occur, relative displacement between the first disc BDA and the second disc BDB does not occur. However, when a brake noise occurs in any one of the first disk BDA and the second disk BDB at the time of braking, periodic relative to the disk in which the brake noise does not occur. Displacement occurs. The relative movement of the first disc BDA and the second disc BDB generates a frictional force between the first fin plane Maf and the second fin plane Mbf. This frictional force can suppress the generated brake noise. In particular, since a large area is secured for the contact surface Mms, a large friction damping acts, and the squeal vibration in the direction perpendicular to the first and second sliding surfaces Maa and Mba is effectively suppressed. .
 しかし、第1、第2摺動面Maa、Mbaの相対的な動き(微小変位)を伴わない鳴き振動(即ち、摺動面Maa、Mbaに平行な動き振動)に対して、振動抑制効果が低くなる場合があり得る。このような場合に対応するため、通気孔Avnを構成する突起の高さが、例えば、概「1:2」の割合になるよう、第1、第2フィン部Fna、Fnbの高さ(即ち、ディスクの厚さ)に差が設けられ得る。この寸法差によって、第1ディスクBDAと第2ディスクBDBとの固有振動数が相違されるため、摺動面Maa、Mbaに平行な鳴き振動に対しても、振動抑制効果が得られる。 However, the vibration suppression effect is applied to the squeal vibration (that is, movement vibration parallel to the sliding surfaces Maa and Mba) without the relative movement (minute displacement) of the first and second sliding surfaces Maa and Mba. It may be lower. In order to cope with such a case, the heights of the first and second fin portions Fna and Fnb (that is, the heights of the protrusions constituting the vent Avn are, for example, approximately “1: 2”) , Disc thickness) may be provided. Since the natural frequency of the first disk BDA and the second disk BDB is different due to the dimensional difference, the vibration suppressing effect can be obtained also against the squeal vibration parallel to the sliding surfaces Maa and Mba.
 さらに、第1ディスクBDA、及び、第2ディスクBDBが、同時にブレーキ鳴きを生じないように、夫々が異なる振動特性(例えば、固有振動数)を有するものが採用される。従って、第1ディスクBDA、及び、第2ディスクBDBのうちの何れか一方のディスクにてブレーキ鳴きが発生した場合、他方のディスクによって振動が増幅されること(即ち、共振現象)が回避される。 Furthermore, it is adopted that the first disc BDA and the second disc BDB have different vibration characteristics (for example, natural frequency) so that the brakes do not occur simultaneously. Therefore, when a brake noise occurs in any one of the first disk BDA and the second disk BDB, amplification of vibration by the other disk (ie, resonance phenomenon) is avoided. .
 2つのディスクBDA、BDBの全体が、鏡面対称に作製され得る。回転方向が異なる、左右の車輪WHであっても、2つの鏡面対称ディスクBDA、BDBの組み合わせによって、部品点数を増加することなく、ブレーキディスクBRDが構成され得る。また、第1、第2ディスクBDA、BDBが、鏡面対称である場合、第1、第2ディスクBDA、BDB同士の冷却性能の差が僅かである。 The whole of the two disks BDA, BDB can be made mirror-symmetrically. Even in the case of the left and right wheels WH having different rotational directions, the brake disc BRD can be configured by the combination of the two mirror-symmetrical discs BDA and BDB without increasing the number of parts. When the first and second disks BDA and BDB are mirror symmetric, the difference in cooling performance between the first and second disks BDA and BDB is slight.
<第1ディスクBDA>
 図2の正面図、及び、断面図を参照して、第1ディスクBDAについて説明する。第1ディスクBDAにおいて、第1摺動面Maaとは反対面Mab(背面)に、第1フィン部Fna、及び、ボス部Bsaが突出される。ボス部Bsaには、締結孔Ataが開けられている。
<First disc BDA>
The first disk BDA will be described with reference to the front view and the cross-sectional view of FIG. In the first disc BDA, the first fin portion Fna and the boss portion Bsa protrude from the surface Mab (rear surface) opposite to the first sliding surface Maa. A fastening hole Ata is opened in the boss Bsa.
 フィン部Fna、及び、ボス部Bsaの高さ(即ち、第1摺動面Maaからの距離)は、機械加工によって揃えられる。例えば、第1ディスクBDAが鋳造された後に、第1フィン平面Maf、及び、ボス平面Mbsが、第1摺動面Maaと平行な同一平面となるよう、切削、研削、及び、研磨のうちの少なくとも1つの方法によって加工される。 The heights of the fin portion Fna and the boss portion Bsa (that is, the distance from the first sliding surface Maa) are aligned by machining. For example, after the first disk BDA is cast, the first fin plane Maf and the boss plane Mbs are in the same plane parallel to the first sliding surface Maa, and then one of cutting, grinding, and polishing is performed. It is processed by at least one method.
 第1ディスクBDAと同様に、第2ディスクBDBも、鋳造された後に、機械加工(切削、研削、及び、研磨のうちの少なくとも1つ)によって仕上げられる。機械加工を採用して、第1、第2摺動面Maa、Mbaに平行な第1、第2フィン平面Maf、Mbfを高精度に成形することは、相対的に容易であることに因る。 Similar to the first disc BDA, the second disc BDB is also finished by machining (at least one of cutting, grinding and polishing) after being cast. It is relatively easy to form the first and second fin planes Maf and Mbf parallel to the first and second sliding surfaces Maa and Mba with high precision by employing machining. .
 第1フィン部Fnaは、渦巻き形状になっている(所謂、カーブヴェーン型である)。具体的には、第1フィン部Fnaは、第1ディスクBDAの内周部では半径方向に延ばされ、外周部に近づくにつれて、徐々に、ブレーキディスクBRDの正転方向(車両前進方向に対応)Dfwとは逆方向に傾けられる(正面図参照)。この渦巻き形状の第1フィン部Fnaが回転することによって、ブレーキディスクBRDは、中央部から外周部に空気を円滑に排出することができ、冷却性能が向上され得る。なお、第2ディスクBDBの第2フィン部Fnbは、第1フィン部Fnaと合致するよう、第1フィン部Fnaとは鏡面対称(鏡像対称)に形成されている。従って、第1フィン部Fnaの第1フィン平面Mafと、第2フィン部Fnbの第2フィン平面Mbfとは、平面形状において線対称の関係にある。 The first fin portion Fna has a spiral shape (a so-called curve vane type). Specifically, the first fin portion Fna is radially extended at the inner peripheral portion of the first disc BDA, and gradually approaches the forward direction of the brake disc BRD (closer to the forward direction of the vehicle) as it gets closer to the outer peripheral portion. ) It is inclined in the opposite direction to Dfw (see front view). By rotating the spiral shaped first fin portion Fna, the brake disc BRD can smoothly discharge the air from the central portion to the outer peripheral portion, and the cooling performance can be improved. The second fin portion Fnb of the second disk BDB is formed in mirror symmetry (mirror symmetry) with the first fin portion Fna so as to coincide with the first fin portion Fna. Therefore, the first fin plane Maf of the first fin portion Fna and the second fin plane Mbf of the second fin portion Fnb are in a line symmetrical relationship in the plane shape.
 第1フィン部Fnaとして、カーブヴェーン型フィンに代えて、直線形状(即ち、正転方向Dfwに傾くことなく半径方向に延ばされた形状)を有する、ストレート型のものが採用され得る。ストレート型の第1フィン部Fnaにおいても、第2フィン部Fnbと合致するように、その形状が決定されている。 As the first fin portion Fna, a straight type having a linear shape (that is, a shape extended in the radial direction without being inclined in the forward direction Dfw) may be employed instead of the curve vane type fin. The shape of the straight first fin portion Fna is also determined so as to coincide with the second fin portion Fnb.
 鋳造によって、第1、第2背面Mab、Mbbから突出した第1、第2フィン部Fna、Fnbを製造するためには、中子は不要である。これは、通気孔Avnが、摺動面Maa、Mbaの背面(裏面)Mab、Mbbに設けられる溝として鋳造されることに因る。なお、「中子」とは、空洞がある鋳物を造る際に空洞に該当する部分として、鋳型の中にはめ込む砂型のことである。 In order to manufacture the first and second fin portions Fna and Fnb projecting from the first and second back surfaces Mab and Mbb by casting, no core is required. This is due to the fact that the vent holes Avn are cast as grooves provided on the back surface (back surface) Mab, Mbb of the sliding surfaces Maa, Mba. In addition, a "core" is a sand mold which inserts in a casting_mold | template as a part applicable to a cavity when producing the casting which has a cavity.
 中子が不要になるため、鋳造の効率化が図られるとともに、鋳造での中子強度を考慮する必要がない(換言すれば、中子強度と第1、第2フィン部Fna、Fnbの形状とのトレードオフが存在しない)。このため、フィン部Fna、Fnbの形状が、冷却性のためだけに最適化され得る。例えば、より微細な形状をもつ通気孔Avnが形成され、冷却性能が向上され得る。 Since the core is not necessary, the efficiency of casting can be improved, and it is not necessary to consider the core strength in casting (in other words, the core strength and the shapes of the first and second fin portions Fna and Fnb) There is no tradeoff with For this reason, the shape of the fin portion Fna, Fnb can be optimized only for the cooling property. For example, vents Avn having a finer shape may be formed to improve the cooling performance.
 制動時の発熱により、第1、第2摺動面Maa、Mbaと、第1、第2フィン部Fna、Fnbとの温度差が大きくなると、摺動面Maa、Mbaが、凸状態に熱変形する場合があり得る。この熱変形を抑制するために、第1、第2フィン部Fna、Fnbに同心円状の切れ目(図示せず)が設けられ得る。該切れ目は、鋳造、又は、切削によって成形され得る。 When the temperature difference between the first and second sliding surfaces Maa and Mba and the first and second fin portions Fna and Fnb becomes large due to heat generation during braking, the sliding surfaces Maa and Mba are thermally deformed into a convex state. There is a possibility of doing. In order to suppress this thermal deformation, concentric cuts (not shown) may be provided in the first and second fin portions Fna and Fnb. The cut may be formed by casting or cutting.
 上述したように、第1ディスクBDAの第1フィン平面Mafは、第1摺動面Maaを基準として、第1摺動面Maaと平行となるよう、機械加工(例えば、削り加工、研磨加工)によって成形される。同様に、第2ディスクBDBの第2フィン平面Mbfは、第2摺動面Mbaを基準として、第2摺動面Mbaと平行となるよう、機械加工によって成形される。そして、第1フィン平面Mafと第2フィン平面Mbfとが接触するよう、第1ディスクBDAと第2ディスクBDBとが、ハット部材HTB、及び、締結部材TKBによって固定される。このため、第1、第2ディスクBDA、BDBが、第1、第2摩擦パッドMSA、MSBに挟まれて押圧された状態で、第1フィン平面Mafと第2フィン平面Mbfとが均一に面接触する。結果、摩擦減衰の効果が最大限に得られる。 As described above, the first fin plane Maf of the first disk BDA is machined (for example, shaving, polishing) so as to be parallel to the first sliding surface Maa with respect to the first sliding surface Maa. Molded by Similarly, the second fin plane Mbf of the second disk BDB is shaped by machining so as to be parallel to the second sliding surface Mba with reference to the second sliding surface Mba. Then, the first disc BDA and the second disc BDB are fixed by the hat member HTB and the fastening member TKB so that the first fin plane Maf and the second fin plane Mbf are in contact with each other. For this reason, in a state where the first and second disks BDA and BDB are sandwiched and pressed by the first and second friction pads MSA and MSB, the first fin plane Maf and the second fin plane Mbf uniformly face each other. Contact. As a result, the effect of friction damping can be obtained maximally.
<ブレーキディスクBRDの第1の実施形態の変形例>
 図3の断面図を参照して、本発明に係るブレーキディスクBRDの第1の実施形態の変形例について説明する。変形例では、第2ディスクBDBのフィン部が省略され、第2ディスクBDBが平板形状として構成される。
Modification of First Embodiment of Brake Disc BRD
A modification of the first embodiment of the brake disk BRD according to the present invention will be described with reference to the sectional view of FIG. In the modification, the fin portion of the second disk BDB is omitted, and the second disk BDB is configured as a flat plate.
 変形例においても、2つのディスクBDA、BDBは、溝の部分で互いに突き合わされることはない。即ち、第1フィン部Fnaの第1フィン平面Mafと、第2ディスクBDBの第2背面Mbb(第2摺動面Mbaの裏側面)とが面接触される。このため、十分な接触面積、且つ、均一な接触面圧が確保され、摩擦減衰の効果が発揮され得る(D-D断面図参照)。結果、上記同様のブレーキ鳴き抑制効果を奏する。なお、第1ディスクBDAの第1フィン部Fnaと、第2ディスクBDBの第2背面Mbbとの隙間が、通気孔Avnとして機能する。 Also in the variant, the two discs BDA, BDB are not butted against one another in the part of the groove. That is, the first fin plane Maf of the first fin portion Fna and the second back surface Mbb of the second disk BDB (the back side surface of the second sliding surface Mba) are in surface contact. For this reason, a sufficient contact area and uniform contact surface pressure can be ensured, and the effect of friction damping can be exhibited (see DD cross-sectional view). As a result, the same brake noise suppression effect as described above is exhibited. A gap between the first fin portion Fna of the first disc BDA and the second back surface Mbb of the second disc BDB functions as the vent hole Avn.
 第2ディスクBDBには、鉄板(例えば、鋼板)を採用し、これをプレス成型することによって作製され得る。なお、鉄板は、材料作製時に、2つの平面の平行度が確保されるため、ブレーキディスクBRDの組み付けのために新たに機械加工される必要はない。 The second disc BDB may be manufactured by adopting an iron plate (for example, a steel plate) and pressing it. The iron plate does not have to be newly machined for assembly of the brake disc BRD because the parallelism between the two planes is secured at the time of material production.
 また、図示したものとは逆に、第1ディスクBDAが平板形状であり、第2ディスクBDBが第2フィン部Fnbを有する形状であってもよい。この構成では、第2フィン部Fnbの第2フィン平面Mbfが、第1背面Mab(第1摺動面Maaの裏側面)に面接触し、摩擦減衰効果を発揮する。この場合でも、上記同様のブレーキ鳴き抑制効果を奏する。 Further, contrary to the illustrated one, the first disc BDA may be flat and the second disc BDB may be shaped so as to have the second fin portion Fnb. In this configuration, the second fin plane Mbf of the second fin portion Fnb is in surface contact with the first back surface Mab (the back surface of the first sliding surface Maa), and exhibits a friction damping effect. Even in this case, the same brake squeak suppression effect is exhibited.
<本発明に係るブレーキディスクの第2の実施形態>
 図4の正面図、及び、断面図を参照して、本発明に係るブレーキディスクBRDの第2の実施形態について説明する。第2の実施形態では、第1、第2ディスクBDD、BDEは何れも平板形状であり、第3の環状部材である中間ディスクBDCが、第1ディスクBDDと第2ディスクBDEとの間に設けられる。上述したように、「HTB」の如く、同一の記号が付された構成部材、及び、部位は、同一の機能を発揮するものである。
<Second Embodiment of Brake Disc according to the Present Invention>
A second embodiment of a brake disc BRD according to the present invention will be described with reference to the front view and the cross-sectional view of FIG. In the second embodiment, each of the first and second disks BDD and BDE has a flat plate shape, and the intermediate disk BDC as the third annular member is provided between the first disk BDD and the second disk BDE. Be As described above, like “HTB”, component members and parts denoted by the same symbols perform the same function.
 第1の実施形態と同様に、第1、第2ディスクBDD、BDEは、締結部材TKBによって、ハット部材HTBに取り付けられる。E-E断面図を参照して、各部材の形状、及び、取り付けについて、簡単に説明する。第1ディスクBDDは、環状に成形された円盤部材である。第1ディスクBDDは、第1摺動面Mdaの外周部分にて、第1摩擦パッドMSA(インナ側摩擦パッド)と摺接する。第1摺動面Mdaにおいて、第1摩擦パッドMSAと摺動する領域が、第1ディスクBDDの「摺動範囲」である。第1摺動面Mdaとは反対側(裏側)の平面が、第1背面Mdbである。第1ディスクBDDの内周部分には複数の締結孔Atd(貫通孔)が設けられている。 As in the first embodiment, the first and second disks BDD and BDE are attached to the hat member HTB by the fastening member TKB. The shape and mounting of each member will be briefly described with reference to the EE cross-sectional view. The first disc BDD is a disc member formed in an annular shape. The first disc BDD is in sliding contact with the first friction pad MSA (inner side friction pad) at the outer peripheral portion of the first sliding surface Mda. In the first sliding surface Mda, the region sliding with the first friction pad MSA is the “sliding range” of the first disk BDD. The plane of the opposite side (back side) to the first sliding surface Mda is the first back surface Mdb. A plurality of fastening holes Atd (through holes) are provided in the inner peripheral portion of the first disc BDD.
 第2ディスクBDEは、第1ディスクBDDと同様に、環状に成形された薄板形状の部材である。第2ディスクBDEは、第2摺動面Meaの外周部分にて、第2摩擦パッドMSB(アウタ側摩擦パッド)と摺接する。第2摺動面Meaにおいて、第2摩擦パッドMSBと摺動する領域が、第2ディスクBDEの「摺動範囲」である。第2摺動面Meaとは反対側(裏側)の平面が、第2背面Mebである。第2ディスクBDEの内周部分には、複数の締結孔Ate(貫通孔)が設けられている。ここで、第1、第2ディスクBDD、BDEは、鉄板(例えば、鋼板)をプレス成型することによって作製され得る。上記同様、鉄板は、材料作製時に、2つの平面の平行度が確保されるため、ブレーキディスクBRDの組み付けのために新たに機械加工される必要はない。 Similar to the first disc BDD, the second disc BDE is a thin-plate shaped member formed in an annular shape. The second disk BDE is in sliding contact with the second friction pad MSB (outer side friction pad) at the outer peripheral portion of the second sliding surface Mea. In the second sliding surface Mea, the region sliding with the second friction pad MSB is the “sliding range” of the second disk BDE. A plane on the opposite side (back side) to the second sliding surface Mea is a second back surface Meb. A plurality of fastening holes Ate (through holes) are provided in the inner peripheral portion of the second disk BDE. Here, the first and second disks BDD and BDE can be produced by press-forming an iron plate (for example, a steel plate). As described above, the iron plate does not need to be newly machined for assembly of the brake disc BRD, since the parallelism of the two planes is secured at the time of material production.
 ハット部材HTBは、ハブボルトHBL、及び、ホイールナットWNTによって、ハブユニットHUB、及び、車輪WHに一体的に固定される。ハット部材HTBの円筒状の外周面Mhtに、第1ディスクBDDの内周面Mhd、第2ディスクBDEの内周面Mhe、及び、中間ディスクBDCの内周面Mhcが、僅かな隙間をもって嵌め合わされ、締結部材TKB(例えば、かしめ部材)によって固定される。ここで、締結部材TKBによる締結部位は、上記摺動範囲よりも内周側(回転軸Jwhに近接した側)である。 The hat member HTB is integrally fixed to the hub unit HUB and the wheel WH by the hub bolt HBL and the wheel nut WNT. The inner peripheral surface Mhd of the first disk BDD, the inner peripheral surface Mhe of the second disk BDE, and the inner peripheral surface Mhc of the intermediate disk BDC are fitted to the cylindrical outer peripheral surface Mht of the hat member HTB with a slight gap. And the fastening member TKB (eg, caulking member). Here, the fastening portion by the fastening member TKB is on the inner peripheral side (side closer to the rotation axis Jwh) than the above-mentioned sliding range.
 中間ディスクBDCは、第1ディスクBDDと第2ディスクBDEとに挟まれるように、第1ディスクBDDと第2ディスクBDEとの間に設けられる。中間ディスクBDCの両面Mcd、Mce(第1、第2ディスクBDD、BDEと接触する平面)には、交互に溝部(凹部)Zmd、Zmeが形成されている。即ち、第1ディスクBDDの第1摺動面Mdaと接触する第1接触面Mcdには、第1溝部Zmdが設けられる。また、第2ディスクBDEの第2摺動面Meaと接触する第2接触面Mceには、第2溝部Zmeが設けられる。そして、中間ディスクBDCの表裏で、第1溝部Zmd、及び、第2溝部Zmeが交互に設けられる。中間ディスクBDCの第1、第2溝部Zmd、Zmeは、ブレーキディスクBRDが組み立てられた場合に、通気孔Avnを形成する。 The intermediate disk BDC is provided between the first disk BDD and the second disk BDE so as to be sandwiched between the first disk BDD and the second disk BDE. Grooves (concave portions) Zmd and Zme are alternately formed on both surfaces Mcd and Mce (planes in contact with the first and second disks BDD and BDE) of the intermediate disk BDC. That is, the first groove portion Zmd is provided in the first contact surface Mcd in contact with the first sliding surface Mda of the first disk BDD. A second groove Zme is provided on the second contact surface Mce in contact with the second sliding surface Mea of the second disc BDE. Then, the first groove portion Zmd and the second groove portion Zme are alternately provided on the front and back of the intermediate disk BDC. The first and second groove portions Zmd and Zme of the intermediate disk BDC form the vent holes Avn when the brake disk BRD is assembled.
 第1ディスクBDD、中間ディスクBDC、及び、第2ディスクBDEは、重ね合わされて固定される。従って、第1ディスクBDDの第1背面Mdbと、中間ディスクBDCの第1接触面Mcdとが、微小変位可能な状態で面接触する。また、第2ディスクBDEの第2背面Mebと、中間ディスクBDCの第2接触面Mceとが微小変位可能な状態で面接触する。ここで、第1背面Mdbと第1接触面Mcdとが接触する平面、及び、第2背面Mebと第2接触面Mceとが接触する平面が、当接面Mmsである。 The first disk BDD, the intermediate disk BDC, and the second disk BDE are stacked and fixed. Therefore, the first rear surface Mdb of the first disk BDD and the first contact surface Mcd of the intermediate disk BDC are in surface contact in a state where microdisplacement is possible. In addition, the second back surface Meb of the second disk BDE and the second contact surface Mce of the intermediate disk BDC are in surface contact with each other in a state in which small displacement is possible. Here, the plane in which the first back surface Mdb contacts the first contact surface Mcd, and the plane in which the second back surface Meb contacts the second contact surface Mce are the contact surfaces Mms.
 第1の実施形態と同様に、ブレーキ鳴きが発生した場合には、当接面Mmsで微小な相互運動が生じる。このとき、接触面間では摩擦力が発生し、この摩擦力による減衰効果によって、ブレーキ鳴きが低減され得る。 As in the first embodiment, when the brake noise occurs, minute mutual motion occurs in the contact surface Mms. At this time, a frictional force is generated between the contact surfaces, and the damping effect of the frictional force can reduce the brake noise.
<中間ディスクBDC>
 図5の正面図、及び、部分側面図を参照して、第2の実施形態における、中間ディスクBDCについて説明する。中間ディスクBDCの両面(第1、第2接触面)Mcd、Mceには、第1、第2溝部Zmd、Zmeが設けられている。第1、第2溝部Zmd、Zmeは、通気孔Avnとして機能する。即ち、第1、第2溝部Zmd、Zmeは、中間ディスクBDCの内周部から外周部に向けて延ばされている。
<Intermediate disk BDC>
The intermediate disk BDC in the second embodiment will be described with reference to the front view of FIG. 5 and a partial side view. First and second groove portions Zmd and Zme are provided on both surfaces (first and second contact surfaces) Mcd and Mce of the intermediate disk BDC. The first and second grooves Zmd and Zme function as the vents Avn. That is, the first and second groove portions Zmd and Zme are extended from the inner circumferential portion to the outer circumferential portion of the intermediate disk BDC.
 例えば、第1、第2溝部Zmd、Zmeは、先ず、鋳造で作製される。そして、鋳造後に、溝を構成する凸部の天面Mcd、Mceに機械加工(例えば、切削、研削等の削り加工)が施される。該機械加工によって、高精度の平行な第1、第2接触面Mcd、Mceが、容易に形成され得る。このため、摩擦減衰が効果的に確保され得る。 For example, the first and second grooves Zmd and Zme are first manufactured by casting. Then, after casting, machining (for example, cutting such as cutting or grinding) is applied to the top surfaces Mcd and Mce of the convex portions that constitute the groove. By the machining, highly accurate parallel first and second contact surfaces Mcd and Mce can be easily formed. For this reason, friction damping can be effectively ensured.
 上述したように、鋳造によって、第1、第2溝部Zmd、Zmeを形成するために中子は不要である。従って、中子強度とのトレードオフが存在せず、第1、第2溝部Zmd、Zmeの形状(即ち、フィン形状)が、冷却性のみを考慮して、最適化され得る。 As described above, no core is required to form the first and second groove portions Zmd and Zme by casting. Therefore, there is no trade-off with core strength, and the shapes of the first and second groove portions Zmd, Zme (ie, the fin shape) can be optimized in consideration of only the cooling property.
 環状部材である中間ディスクBDCの内周側面Mhcにて、ハット部材HTBに対する同軸を確保している。しかし、中間ディスクBDCは制動トルクを負担しないため、中間ディスクBDCは、締結部材TKBによって固定される必要はない。 Coaxiality with the hat member HTB is secured at the inner peripheral side Mhc of the intermediate disk BDC which is an annular member. However, since the intermediate disc BDC does not bear the braking torque, the intermediate disc BDC does not have to be fixed by the fastening member TKB.
 中間ディスクBDCの両面(第1、第2接触面)Mcd、Mceに、第1、第2溝部Zmd、Zmeが交互に設けられているが、何れか一方側の面における溝部が省略され得る。溝部が省略された側の面は、均一平面となる。 The first and second groove portions Zmd and Zme are alternately provided on both surfaces (first and second contact surfaces) Mcd and Mce of the intermediate disk BDC, but the groove portions on one of the surfaces may be omitted. The surface on the side where the groove is omitted is a uniform plane.
<他の実施形態>
 上述のように、本発明に係るブレーキディスクBRDでは、通気孔Avnを構成するディスク部材BDA、BDB、BDCの各平面Maf、Mbf、Mcd、Mceが、機械加工(切削、研削、及び、研磨のうちの少なくとも1つ)によって製作される。従って、各平面Maf、Mbf、Mcd、Mceは、平坦であり、且つ、摺動面Maa、Mba、Mda、Meaに対して、十分な平行度が確保される。そして、当接面Mmsが、高精度な平面Maf、Mbf、Mcd、Mceにて構成されるため、摩擦減衰に利用可能な面積が十分に確保され、均一な接触状態が得られる。結果、摩擦減衰によって、ブレーキ鳴きが、効果的に抑制され得る。
Other Embodiments
As described above, in the brake disc BRD according to the present invention, the planes Maf, Mbf, Mcd, and Mce of the disc members BDA, BDB, and BDC constituting the vent hole Avn are machined (cutting, grinding, and polishing Manufactured by at least one of Therefore, each of the planes Maf, Mbf, Mcd, and Mce is flat, and sufficient parallelism is ensured with respect to the sliding surfaces Maa, Mba, Mda, and Mea. And, since the contact surface Mms is constituted by the highly accurate planes Maf, Mbf, Mcd, and Mce, an area that can be used for friction damping is sufficiently secured, and a uniform contact state can be obtained. As a result, the friction noise can effectively suppress the brake noise.
 以下、他の実施形態について説明する。他の実施形態においても、上記同様の効果(摩擦減衰の効果的な発揮、簡素化された摩擦減衰構成)を奏する。 Hereinafter, other embodiments will be described. Also in the other embodiments, the same effects as described above (effective effect of friction damping, simplified friction damping configuration) are exhibited.
 第1ディスクBDA、BDDと第2ディスクBDB、BDEとの結合に、かしめ固定が例示された。締結部材TKBとして、かしめ部材に代えて、ねじ締結部材が採用され得る。また、固定方法として、溶接(例えば、スポット溶接)が採用され得る。このような固定方法においても、ディスク相互の微小変位が確保され得る。さらに、ディスク相互の締結軸力を適正範囲に保つため、締結部位に皿ばね等が追加され得る。 The bonding between the first disc BDA, BDD and the second disc BDB, BDE is exemplified by caulking. As the fastening member TKB, a screw fastening member may be employed instead of the caulking member. In addition, welding (for example, spot welding) may be employed as a fixing method. Even in such a fixing method, a minute displacement between the disks can be secured. Furthermore, a disc spring or the like may be added to the fastening portion in order to keep the fastening axial force between the disks in an appropriate range.
 ハット部材HTBの締結孔Athは、長孔形状として形成され得る。制動時の発熱によって、各ディスク部材BDA、BDB、BDD、BDEは熱膨張する。この場合、各部材の内周面Mha、Mhb、Mhd、Mheが拡径するが、長孔形状の締結孔Athによって、ハット部材HTBの外周面Mhtから離れることが許容される。結果、ハット部材HTBの変形が抑制され得る。 The fastening hole Ath of the hat member HTB may be formed as a long hole shape. The heat generated at the time of braking thermally expands the disc members BDA, BDB, BDD, and BDE. In this case, although the inner peripheral surfaces Mha, Mhb, Mhd, and Mhe of the respective members expand in diameter, they can be separated from the outer peripheral surface Mht of the hat member HTB by the long hole-shaped fastening holes Ath. As a result, deformation of the hat member HTB can be suppressed.
 上記実施形態では、ハット部材HTBとディスク部材(BDA等)とが別部材として構成された。2つのディスクのうちの何れか一方とハット部とが一体的に成形され得る。そして、2つのディスクのうちの他方が、ハット部にて、微小変位可能な状態で締結される。 In the above embodiment, the hat member HTB and the disk member (BDA or the like) are configured as separate members. One of the two disks and the hat can be integrally formed. Then, the other of the two disks is fastened at the hat portion in a slightly displaceable state.
 上記実施形態では、車輪WHのホイールディスク部よりも遠い側(即ち、車両の左右方向において内側)に位置するインナ側ブレーキパッドが第1摩擦パッドMSAとされ、車輪WHのホイールディスク部に近い側(即ち、車両の左右方向において外側)に位置するアウタ側ブレーキパッドが第2摩擦パッドMSBとされた。これに伴い、インナ側(車両の左右方向において内側)のディスク部材が第1ディスクBDA、BDDとされ、アウタ側(車両の左右方向において外側)のディスク部材が第2ディスクBDB、BDEとされた。しかし、これらは逆であってもよい。即ち、「インナ側に係るもの」が、第2摩擦パッド、第2ディスクとされ、「アウタ側に係るもの」が、第1摩擦パッド、第1ディスクとされ得る。
 
In the above embodiment, the inner brake pad located on the side farther from the wheel disc portion of the wheel WH (that is, the inner side in the lateral direction of the vehicle) is the first friction pad MSA, and the side closer to the wheel disc portion of the wheel WH The outer brake pad positioned at the outer side in the lateral direction of the vehicle is used as the second friction pad MSB. Along with this, the disk members on the inner side (inner side in the left and right direction of the vehicle) are made the first disks BDA and BDD, and the disk members on the outer side (the outer side in the left and right direction of the vehicle) . However, these may be reversed. That is, "the one related to the inner side" may be the second friction pad and the second disk, and "the one related to the outer side" may be the first friction pad and the first disk.

Claims (3)

  1.  車両の車輪に固定され、2つの摩擦パッドによって挟まれることによって、前記車輪に制動力を発生するブレーキディスクであって、
     前記2つの摩擦パッドのうちの一方と、第1摺動面にて摺接する第1ディスクと、
     前記2つの摩擦パッドのうちの他方と、第2摺動面にて摺接する第2ディスクと、を備え、
     前記第1ディスクは、前記第1摺動面の反対側である第1背面に複数の細長い突起部である第1フィン部を有し、
     前記第2ディスクは、前記第2摺動面の反対側である第2背面に複数の細長い突起部であり、前記第1フィン部と鏡面対称である第2フィン部を有し、
     前記第1フィン部において前記第1摺動面に平行に形成された第1フィン平面と、前記第2フィン部において前記第2摺動面に平行に形成された第2フィン平面とが、面接触するように固定された、ブレーキディスク。
    A brake disk fixed to a wheel of a vehicle and generating a braking force on the wheel by being pinched by two friction pads,
    A first disk in sliding contact with the first sliding surface with one of the two friction pads;
    The other of the two friction pads and a second disk slidably contacting at the second sliding surface,
    The first disc has a first fin portion which is a plurality of elongated protrusions on a first back surface opposite to the first sliding surface,
    The second disk has a plurality of elongated protrusions on a second back surface opposite to the second sliding surface, and has a second fin portion that is mirror-symmetrical to the first fin portion,
    A first fin plane formed parallel to the first sliding surface in the first fin portion, and a second fin plane formed parallel to the second sliding surface in the second fin portion are surfaces Brake disc fixed to touch.
  2.  車両の車輪に固定され、2つの摩擦パッドによって挟まれることによって、前記車輪に制動力を発生するブレーキディスクであって、
     前記2つの摩擦パッドのうちの一方と、第1摺動面にて摺接する第1ディスクと、
     前記2つの摩擦パッドのうちの他方と、第2摺動面にて摺接する第2ディスクと、を備え、
     前記第1ディスクは、前記第1摺動面の反対側である第1背面に複数の細長い突起部である第1フィン部を有し、
     前記第1フィン部において前記第1摺動面に平行に形成された第1フィン平面と、前記第2ディスクの前記第2摺動面の反対側である第2背面とが、面接触するように固定された、ブレーキディスク。
    A brake disk fixed to a wheel of a vehicle and generating a braking force on the wheel by being pinched by two friction pads,
    A first disk in sliding contact with the first sliding surface with one of the two friction pads;
    The other of the two friction pads and a second disk slidably contacting at the second sliding surface,
    The first disc has a first fin portion which is a plurality of elongated protrusions on a first back surface opposite to the first sliding surface,
    In the first fin portion, a first fin plane formed parallel to the first sliding surface and a second back surface opposite to the second sliding surface of the second disk make surface contact Fixed to the brake disc.
  3.  車両の車輪に固定され、2つの摩擦パッドによって挟まれることによって、前記車輪に制動力を発生するブレーキディスクであって、
     前記2つの摩擦パッドのうちの一方と、第1摺動面にて摺接する第1ディスクと、
     前記2つの摩擦パッドのうちの他方と、第2摺動面にて摺接する第2ディスクと、
     前記第1ディスクと前記第2ディスクとの中間に設けられる中間ディスクと、を備え、
     前記中間ディスクの2つの平面は平行であって、前記2つの平面のうちの少なくとも一方の平面に複数の細長い溝が成形され、
     前記第1ディスクと前記中間ディスクとが面接触し、前記第2ディスクと前記中間ディスクとが面接触するよう固定された、ブレーキディスク。
     
    A brake disk fixed to a wheel of a vehicle and generating a braking force on the wheel by being pinched by two friction pads,
    A first disk in sliding contact with the first sliding surface with one of the two friction pads;
    The other of the two friction pads and a second disk in sliding contact with the second sliding surface;
    An intermediate disk provided between the first disk and the second disk;
    The two planes of the intermediate disc are parallel, and a plurality of elongated grooves are formed in at least one of the two planes;
    A brake disc fixed such that the first disc and the intermediate disc are in surface contact and the second disc and the intermediate disc are in surface contact.
PCT/JP2017/028343 2016-08-04 2017-08-04 Brake disc WO2018025980A1 (en)

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JP2021102991A (en) * 2019-12-25 2021-07-15 株式会社アドヴィックス Ventilated rotor of disc brake

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CN111936759B (en) * 2018-04-03 2022-10-04 日本制铁株式会社 Aerodynamic noise reduction member, brake disc unit for railway vehicle, disc brake for railway vehicle, wheel for railway vehicle, and railway vehicle

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US6234282B1 (en) * 1998-04-11 2001-05-22 Dr. Ing. H.C.F. Porsche Ag Brake disk for a motor vehicle
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021102991A (en) * 2019-12-25 2021-07-15 株式会社アドヴィックス Ventilated rotor of disc brake

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