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WO2002038979A1 - Disque composite de frein a disques - Google Patents

Disque composite de frein a disques Download PDF

Info

Publication number
WO2002038979A1
WO2002038979A1 PCT/IT2000/000470 IT0000470W WO0238979A1 WO 2002038979 A1 WO2002038979 A1 WO 2002038979A1 IT 0000470 W IT0000470 W IT 0000470W WO 0238979 A1 WO0238979 A1 WO 0238979A1
Authority
WO
WIPO (PCT)
Prior art keywords
bell
braking band
disk
disk according
recesses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IT2000/000470
Other languages
English (en)
Inventor
Giovanni Mario Tironi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brembo SpA
Original Assignee
Freni Brembo SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Freni Brembo SpA filed Critical Freni Brembo SpA
Priority to AU2001218859A priority Critical patent/AU2001218859A1/en
Priority to PCT/IT2000/000470 priority patent/WO2002038979A1/fr
Publication of WO2002038979A1 publication Critical patent/WO2002038979A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc brakes
    • F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/1304—Structure
    • F16D2065/1316—Structure radially segmented
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1348—Connection resilient
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1356—Connection interlocking
    • F16D2065/136—Connection interlocking with relative movement radially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1356—Connection interlocking
    • F16D2065/1368—Connection interlocking with relative movement both radially and axially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1384—Connection to wheel hub
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1392—Connection elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • F16D2065/134—Connection
    • F16D2065/1392—Connection elements
    • F16D2065/1396—Ancillary resilient elements, e.g. anti-rattle or retraction springs

Definitions

  • the present invention relates to disk brakes and, more particularly, to a composite disk-brake disk as defined in the preamble to Claim 1.
  • a disk brake of the type used as a braking device in motor vehicles comprises an annular cast-iron disk, commonly known as the braking band, which is usually integral with a hub, commonly known as the bell that is connected to a wheel of the vehicle, and a caliper which is fixed to the hub-carrier, is disposed around the braking band, and is provided with brake linings or pads.
  • the caliper acts on the pads by means of an hydraulic operation, so as to bring the pads into contact with the two opposed braking surfaces of the braking band.
  • the main object of the present invention is to provide a composite disk-brake disk with a simple and reliable coupling between the braking band and the bell. This object is achieved by the provision of the composite disk-brake disk defined and characterized in general in Claim 1.
  • Figure 1 is an axonometric view of a bell and of a braking band of a known disk brake
  • Figure 2 is an axonometric view of a known coupling unit usable for the coupling between a bell and a braking band such as those shown in Figure 1, with parts separated,
  • FIG. 3 shows, in section, the known coupling unit of Figure 2, installed
  • Figure 4 is an axonometric view of the composite disk-brake disc according to the invention, with parts separated,
  • Figures 5 and 6 are axonometric views showing two faces of the disk according to the invention, assembled, and
  • Figure 7 is an axonometric view showing a face of an assembled disk according to a variant of the invention.
  • a bell 2 and a braking band 3 of a known disk-brake disk are shown as two axially aligned, separate parts.
  • the bell 2 is formed by a single part made of aluminium alloy and has a drilled flange 4 for the fixing of the disk to the hub of a wheel, and a peripheral ring 5 with a plurality (ten in this embodiment) of radial recesses 6 with parallel sides distributed uniformly around its periphery.
  • the braking band 3 is composed of two substantially annular, parallel, cast-iron plates 7 joined together by spacer elements 8.
  • the annular plate 7 facing towards the bell 2 has a plurality of through-holes 9 distributed uniformly in the vicinity of its inner edge with the same spacing as the radial recesses 6 of the bell.
  • a coupling unit 10 comprises a screw 11, a first washer 12, a second washer 13, a lock nut 14, a first spacer 15 formed by a shaped bush with four sides comprising two pairs of parallel sides, a leaf-spring-like flat spring 16, and a second spacer 17 formed by a tubular element with an intermediate collar 18 having two opposed lateral chamfers .
  • Assembly takes place by inserting the second spacer 17 in each hole 9 of the annular plate 7 until the collar 18 is brought into abutment with the surface of the plate, fitting the first spacer 15 onto the second spacer 17 until it is in abutment with the collar 18, moving the bell 2 up to the plate 7 in a manner such that the first spacers 15 of the coupling units 10 enter the recesses 6 of the peripheral ring 5 of the bell, inserting the screws 11 in the respective first washers 12 and in the respective second spacers 17, fitting the flat springs 16 in a manner such that their ends are in contact with the surface of the bell 2, fitting the second washers 13, and screwing the nuts 14 onto the ends of the screws 11 until they are fully tightened.
  • each of the second spacers 17 is positioned in a manner such that one of the chamfers of the collar 18 is disposed adjacent a corresponding projection 33 ( Figure 3) of the plate 7.
  • each coupling unit 10 is connected to the plate 7, and the bell 2 is spaced from the plate 7 by the collars 18 and is urged against the collars by the flat springs 16.
  • the spacers 15 are of a size such that the distance between the two parallel sides adjacent the sides of the recesses 6 is only slightly less than the width of the radial recesses 6, that is, the tangential play in the coupling is very small.
  • the depth of the radial recesses 6, on the other hand, is quite large to allow for free relative radial movement to take account of the dimensional variations of the bell 2 and of the band 3 due both to the different expansion coefficients of the materials and to their different, temperatures when the disk is heated during a braking operation.
  • the coupling units 10 allow for sufficient axial play by virtue • of the fact that the height of the first spacers 15 is greater than the thickness of the peripheral ring . 5 of the bell.
  • the springs 16 serve to prevent vibrations and axial movements which would cause undesired noise.
  • the projections 33 serve to prevent any possible rotation of the second spacers 17 about their axes.
  • the known coupling units described above are constituted by many separate parts some of which have to be oriented appropriately during assembly, so that assembly is rather laborious.
  • each of the coupling means between the bell 2 and the braking band 3 comprises only three parts, more precisely, a drive element 30, a screw 31, and a washer 32.
  • the bell 2 differs from that according to the prior art shown in Figure 1 in that it has a continuous peripheral groove 36 which extends radially throughout the width of the peripheral ring 5, that is, at least throughout the radial extent of the recesses 6.
  • the axial position in which the groove 36 is formed is such as to create a flexible peripheral tongue 37 on the side of the bell farthest from the braking band 3.
  • the outer surface of the peripheral ring 5 of the bell 2 is preferably shaped in a manner such that the thickness of the tongue 37 decreases from the periphery of the bell towards its interior.
  • the drive element 30 is constituted by a single block, preferably made of steel, shaped to fit in a corresponding radial recess 6 of the bell 2 so as to be movable substantially only radially.
  • each block 30 has two opposed parallel faces 30-1 spaced apart by a distance only slightly less than the width of the recess so that, when the block 30 is in position, it can move freely between the sides of the recess.
  • Each block 30 also has four projections 30-2 which define ' the two opposed faces 30-1 so as to form four tabs.
  • the distance between the tabs 30-2 is slightly less than the thickness of the peripheral ring 5 of the bell ' so that, when each block 30 is in position, it engages the opposed surfaces of the bell 2 at the edges of the corresponding recess 6 by interference, by virtue of the resilience of the tongue 37.
  • the drive elements or blocks 30 are fixed to the braking band 3 by the screws 31 which are screwed into corresponding threaded holes 30-3 in the drive blocks 30.
  • Each block 30 preferably has a cylindrical appendage 30-4 through which the hole 30-3 extends and which engages in a corresponding hole 35 provided in the plate 7 of the braking band 3.
  • the axial extent of the cylindrical appendage 30-4 is slightly less than the thickness of the plate 7.
  • the drive elements 30 are inserted in the recesses 6 of the bell 2 and remain in place by interference, the braking band 3 is brought up to the bell 2 in a manner such that the cylindrical appendages 30-4 of the drive blocks 30 enter the corresponding holes 35, and the fixing screws 31 are tightened, after the interposition of the washers 32.
  • the assembled unit is as shown in Figures 5 and 6.
  • the dimensions of the drive blocks 30 and of the radial recesses 6 of the bell are such as to allow the blocks 30 to slide radially in the recesses so that the band 3 and the bell 2 are free to expand independently of one another.
  • the tabs 30-2 of the drive blocks 30 are spaced apart in a manner such that, in combination with the flexible tongue 37, they allow for the resilient axial play which is necessary to compensate for the different axial expansions of the bell 2 and of the band 3 and to prevent relative movements which could cause vibrations and noise during the rotation of the wheel to . which the disk brake is connected.
  • the bell 2 has a number of peripheral cavities 38 equal to the number of recesses 6.
  • the cavities 38 extend radially, for example, as semicircular millings each centred on a recess 6 and form, around the respective recesses, flexible diaphragms 39 which perform exactly the same function as the tongue 37 of the disk shown in Figure 4.
  • the invention may be implemented with the same advantages with the use of materials other than those indicated in the embodiments described for the bell and for the band, such as steel, cast iron or titanium for the bell and carbon/silicon carbide, or other light composite material for the band.

Landscapes

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

Abstract

L'invention concerne un disque formé d'une coiffe (2), d'une surface de freinage (3), et de moyens de couplage (30) disposés entre lesdites coiffe et surface de freinage. La coiffe (2) comprend, à sa périphérie, une pluralité d'évidements radiaux (6) à côtés parallèles, et les moyens de couplage comprennent une pluralité d'éléments d'entraînement (30) correspondants, chacun d'eux étant introduit dans l'évidement radial (6) correspondant de la coiffe (2) de façon à être déplacé uniquement radialement. Afin de permettre un assemblage rapide et facile et un couplage ferme et silencieux entre la coiffe (2) et la surface de freinage (3), chaque élément d'entraînement (30) est formé d'un seul bloc en forme fixé à la surface de freinage (3) à l'aide de moyens de fixation dotés d'un jeu axial (31, 37) élastique à deux faces parallèles (30-1) qui viennent en aboutement avec les côtés des évidements radiaux (6) correspondants de la coiffe (2), et qui comprennent des ergots de retenue (30-2) axiaux coopérant avec les bords des évidements (6) correspondants des surfaces opposées de la coiffe (2).
PCT/IT2000/000470 2000-11-13 2000-11-13 Disque composite de frein a disques Ceased WO2002038979A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2001218859A AU2001218859A1 (en) 2000-11-13 2000-11-13 Disc brake rotor
PCT/IT2000/000470 WO2002038979A1 (fr) 2000-11-13 2000-11-13 Disque composite de frein a disques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2000/000470 WO2002038979A1 (fr) 2000-11-13 2000-11-13 Disque composite de frein a disques

Publications (1)

Publication Number Publication Date
WO2002038979A1 true WO2002038979A1 (fr) 2002-05-16

Family

ID=11133583

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2000/000470 Ceased WO2002038979A1 (fr) 2000-11-13 2000-11-13 Disque composite de frein a disques

Country Status (2)

Country Link
AU (1) AU2001218859A1 (fr)
WO (1) WO2002038979A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004102025A1 (fr) * 2003-05-14 2004-11-25 Daimlerchrysler Ag Disque de frein a bague de friction et a element de raccordement
DE10349304A1 (de) * 2003-10-23 2005-05-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Bremsbelag für eine Scheibenbremse eines Fahrzeuges
EP2028387A1 (fr) * 2007-08-24 2009-02-25 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Raccordement moyeu/disque de frein
DE102008036396A1 (de) 2008-08-05 2010-02-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Gebaute Scheibenbremse
DE102009003643A1 (de) * 2008-12-18 2010-09-23 Leiber Group Gmbh & Co. Kg Bremsanlage mit anpassungsfähiger Steifigkeit
WO2011027945A1 (fr) * 2009-09-02 2011-03-10 Dacc Co., Ltd. Ensemble disque de frein carbone-céramique
JP2017500514A (ja) * 2013-12-20 2017-01-05 ブレンボ エスジーエル カーボン セラミック ブレイクス ゲゼルシャフト ミット ベシュレンクテル ハフツングＢｒｅｍｂｏ ＳＧＬ Ｃａｒｂｏｎ Ｃｅｒａｍｉｃ Ｂｒａｋｅｓ ＧｍｂＨ ブレーキディスクアセンブリ用の接続手段
DE102017106461A1 (de) 2017-03-27 2018-09-27 Saf-Holland Gmbh Verbindungsvorrichtung, System aus einer Radnabe, einer Bremsscheibe und einer Verbindungsvorrichtung und Verfahren zum Verbinden einer Bremsscheibe mit einer Radnabe
US10704628B2 (en) 2018-07-20 2020-07-07 Bendix Spicer Foundation Brake Llc Brake disc mounting arrangement
US10830295B2 (en) 2018-07-20 2020-11-10 Bendix Spicer Foundation Brake Llc Brake disc mounting arrangement
US10837509B2 (en) 2018-07-20 2020-11-17 Bendix Spicer Foundation Brake Llc Brake disc mounting arrangement
CN112879473A (zh) * 2020-12-31 2021-06-01 北京天宜上佳高新材料股份有限公司 一种分体式制动盘及汽车
JP2022515748A (ja) * 2018-12-20 2022-02-22 ブレンボ・ソチエタ・ペル・アツィオーニ ディスクブレーキのディスクアセンブリ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645041A (en) * 1984-04-24 1987-02-24 Automotive Products Plc Brake discs
EP0849485A2 (fr) * 1996-12-17 1998-06-24 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Disque de frein assemblé
DE29906138U1 (de) * 1999-04-09 1999-07-01 Spiegler Bremstechnik GmbH, 79117 Freiburg Bremsscheibe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645041A (en) * 1984-04-24 1987-02-24 Automotive Products Plc Brake discs
EP0849485A2 (fr) * 1996-12-17 1998-06-24 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Disque de frein assemblé
DE29906138U1 (de) * 1999-04-09 1999-07-01 Spiegler Bremstechnik GmbH, 79117 Freiburg Bremsscheibe

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004102025A1 (fr) * 2003-05-14 2004-11-25 Daimlerchrysler Ag Disque de frein a bague de friction et a element de raccordement
DE10321795B3 (de) * 2003-05-14 2005-01-20 Daimlerchrysler Ag Bremsscheibe mit einem Reibring und einem Anbindungselement
US7770699B2 (en) 2003-05-14 2010-08-10 Daimler Ag Brake disk comprising a friction ring and a linking element
DE10349304A1 (de) * 2003-10-23 2005-05-25 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Bremsbelag für eine Scheibenbremse eines Fahrzeuges
EP2028387A1 (fr) * 2007-08-24 2009-02-25 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Raccordement moyeu/disque de frein
DE102008036396A1 (de) 2008-08-05 2010-02-11 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Gebaute Scheibenbremse
DE102009003643B4 (de) * 2008-12-18 2013-08-01 Leiber Group Gmbh & Co. Kg Bremsanlage mit anpassungsfähiger Steifigkeit
DE102009003643A1 (de) * 2008-12-18 2010-09-23 Leiber Group Gmbh & Co. Kg Bremsanlage mit anpassungsfähiger Steifigkeit
WO2011027945A1 (fr) * 2009-09-02 2011-03-10 Dacc Co., Ltd. Ensemble disque de frein carbone-céramique
KR101112987B1 (ko) * 2009-09-02 2012-02-24 주식회사 데크 탄소-세라믹 브레이크 디스크 조립체
JP2013504022A (ja) * 2009-09-02 2013-02-04 デク カンパニー リミテッド 炭素−セラミックブレーキディスクアセンブリ
JP2017500514A (ja) * 2013-12-20 2017-01-05 ブレンボ エスジーエル カーボン セラミック ブレイクス ゲゼルシャフト ミット ベシュレンクテル ハフツングＢｒｅｍｂｏ ＳＧＬ Ｃａｒｂｏｎ Ｃｅｒａｍｉｃ Ｂｒａｋｅｓ ＧｍｂＨ ブレーキディスクアセンブリ用の接続手段
DE102017106461B4 (de) 2017-03-27 2021-12-09 Saf-Holland Gmbh Verbindungsvorrichtung, System aus einer Radnabe, einer Bremsscheibe und einer Verbindungsvorrichtung und Verfahren zum Verbinden einer Bremsscheibe mit einer Radnabe
US11174909B2 (en) 2017-03-27 2021-11-16 Saf-Holland Gmbh Connection device and method for connecting a brake disk to a wheel hub
DE102017106461A1 (de) 2017-03-27 2018-09-27 Saf-Holland Gmbh Verbindungsvorrichtung, System aus einer Radnabe, einer Bremsscheibe und einer Verbindungsvorrichtung und Verfahren zum Verbinden einer Bremsscheibe mit einer Radnabe
US10704628B2 (en) 2018-07-20 2020-07-07 Bendix Spicer Foundation Brake Llc Brake disc mounting arrangement
US10830295B2 (en) 2018-07-20 2020-11-10 Bendix Spicer Foundation Brake Llc Brake disc mounting arrangement
US10837509B2 (en) 2018-07-20 2020-11-17 Bendix Spicer Foundation Brake Llc Brake disc mounting arrangement
US10895293B2 (en) 2018-07-20 2021-01-19 Bendix Spicer Foundation Brake Llc Brake disc mounting arrangement
JP2022515748A (ja) * 2018-12-20 2022-02-22 ブレンボ・ソチエタ・ペル・アツィオーニ ディスクブレーキのディスクアセンブリ
US11802602B2 (en) 2018-12-20 2023-10-31 Brembo S.P.A. Disc assembly of disc brake
JP7664159B2 (ja) 2018-12-20 2025-04-17 ブレンボ・ソチエタ・ペル・アツィオーニ ディスクブレーキのディスクアセンブリ
CN112879473A (zh) * 2020-12-31 2021-06-01 北京天宜上佳高新材料股份有限公司 一种分体式制动盘及汽车

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