CN111656042B - Shaft brake disc and shaft brake disc/hub connection - Google Patents
Shaft brake disc and shaft brake disc/hub connection Download PDFInfo
- Publication number
- CN111656042B CN111656042B CN201980010533.9A CN201980010533A CN111656042B CN 111656042 B CN111656042 B CN 111656042B CN 201980010533 A CN201980010533 A CN 201980010533A CN 111656042 B CN111656042 B CN 111656042B
- Authority
- CN
- China
- Prior art keywords
- friction ring
- brake disc
- shaft brake
- friction
- hub
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/128—Discs; Drums for disc brakes characterised by means for cooling
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- 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
- F16D2065/132—Structure layered
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- 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
- F16D2065/1328—Structure internal cavities, e.g. cooling channels
-
- 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
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/847—Features relating to cooling for disc brakes with open cooling system, e.g. cooled by air
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a shaft brake disk (1) for a rail vehicle, comprising a first friction ring (2) and a second friction ring arranged parallel to and at a distance from the first friction ring, and a device for fastening the brake disk (1) to a web (7) extending radially outward from a wheel hub (6), wherein the two friction rings (2, 4) are designed as separate components. The invention also relates to a shaft brake disc/hub connection.
Description
Technical Field
The invention relates to an axle brake disc for a rail vehicle (or axle-mounted brake disc) according to the invention and to an axle brake disc/hub connection for a rail vehicle.
Background
A typical axle brake disc for rail vehicles usually comprises two friction bands arranged at a distance from one another, between which cooling plates are moulded for cooling the friction bands, and a connection plate moulded on the friction bands for connection to the axle.
Such shaft brake discs are usually cast from one piece. This is associated with relatively complex production, since, due to the geometry of the shaft brake disk, lost cores and open casting processes must be used.
Due to the manufacturing process, the geometric design variations and material choices of such shaft brake discs are severely limited.
Disclosure of Invention
The object of the invention is to provide a shaft brake disc which can be produced in a simple manner and which allows greater design freedom in terms of geometric design and material selection.
Another object of the invention is to provide a shaft brake disc/hub connection which can be mounted in a relatively simple manner.
The first object is achieved by a shaft brake disc having the features of the invention.
The second object is achieved by a shaft brake disc/hub connection having the features of the invention.
The shaft brake disc according to the invention has a first friction ring and a second friction ring arranged parallel to the first friction ring and at a distance therefrom, and means for fixing the brake disc on a web extending radially outward from the hub. The two friction rings are designed here as separate components.
The advantage of such a multi-part shaft brake disk is, in particular, that the design freedom is increased with regard to the geometric design and the material selection.
Furthermore, due to the multiple parts and the associated changes in the production method, more possibilities arise in the selection of materials, so that, for example, materials having a high thermal conductivity can be used to conduct away the heat of the friction surface of the friction ring.
Furthermore, it is advantageous that the material used has a high heat capacity in order to be able to absorb as much heat as possible with a small temperature increase.
Furthermore, it is advantageous that the material used has a high yield limit in order to obtain as little plasticization as possible and thus a small disc (Tellerung).
There is no such variability in the cast materials currently used, from which shaft brake discs are typically manufactured.
Advantageous embodiment variants of the invention are the subject matter of the dependent claims.
According to an advantageous embodiment variant, the friction ring is designed as a stamped or forged part.
It is also conceivable to produce the friction ring from a simple semi-finished product by means of laser cutting/water jet cutting.
Both variants enable particularly simple production of the shaft brake disk.
According to a further advantageous embodiment variant, the first friction ring and the second friction ring of the brake disk are symmetrical with respect to the mirror image in the center between the friction rings and are perpendicular to the axis of rotation of the brake disk.
This makes it possible to keep the number of parts of the shaft brake disk small.
The means for fastening the shaft brake disk to the radially outwardly extending web are at least partially designed as friction ring webs which extend radially inwardly toward the axis of rotation of the brake disk.
This provides the following advantages: when the hub is mounted, the friction ring can be mounted and dismounted axially in both directions relative to the hub.
According to a further embodiment variant, at least one part of the device is designed as a through-opening in the first friction ring and the second friction ring, perpendicular to the friction surfaces of the friction rings, into which through-opening a screw can be inserted for fastening the friction rings to a web extending radially outward from the hub.
This makes it possible to fasten, in particular screw, the shaft brake disk in the region of the friction ring, so that the shaft brake disk can thus be configured approximately similarly to a wheel brake disk.
According to a further advantageous embodiment variant, a cooling body in the form of a separate component is accommodated between the first friction ring and the second friction ring, which cooling body is connected to the friction rings in a form-fitting, force-fitting or material-fitting manner.
The multi-part construction of the shaft brake disk also has the great advantage that the heat sink can be made of a material which has the best cooling effect.
According to an advantageous embodiment variant, the cooling body is designed as a 3D printing, sheet metal, sintered or cast part, or is made of a solid material from which the cooling channels are machined.
The cooling body is designed as a 3D printing, sheet metal, sintered or cast part, which has the advantage of simple production.
The shape of the heat sink, which is a separately embodied component, can be selected very variably here both in terms of material selection and in terms of shape design.
According to a further embodiment variant, the cooling body is designed as a flat plate and as alternating layers of undulated or trapezoidal bent or folded intermediate elements arranged parallel to the friction surfaces of the friction ring for forming the cooling channels.
Such an embodiment of the cooling body makes it possible to produce a large surface at maximum cooling air volume flow, so that a particularly high cooling effect can be achieved with a cooling body of this design.
The plate and/or the intermediate element is particularly preferably designed in the form of a circular ring, when viewed parallel to the friction surface of the friction ring. This enables a particularly simple assembly of the heat sink.
In order to absorb the contact pressure of the brake lining or the forces caused by thermal expansion during braking, according to a further preferred embodiment variant, the heat sink has a plurality of spacer sleeves which are oriented perpendicularly to the friction surface of the friction ring and bear against the rear side of the friction ring facing away from the friction surface.
The axle brake disc/hub connection for a rail vehicle according to the invention, wherein the brake disc has a first friction ring and a second friction ring arranged parallel to and at a distance from the first friction ring, and the hub has a web extending radially outwards, is characterized by an axle brake disc as described above.
According to an advantageous embodiment, the respective web of the hub in the connecting position is accommodated between the friction ring web of the first friction ring and the friction ring web of the second friction ring.
By means of this arrangement, a two-part connection is obtained instead of the one-part connection known from the prior art, as a result of which a significantly higher torque transmission to the hub connection point or the wheel connection point can be achieved.
Furthermore, this design makes it possible to reduce the number of connection points between the brake disk and the hub overall.
Drawings
Preferred embodiments are described in more detail below with reference to the accompanying drawings.
It shows that:
fig. 1 shows a schematic partially sectioned perspective view of an embodiment variant of a shaft brake disc according to the invention, which is connected to a wheel hub, and
fig. 2 shows a schematic partial perspective view of an alternative embodiment variant of the shaft brake disk.
Detailed Description
In the following description of the figures, the terms upper, lower, left, right, front, rear, etc. relate only to selected exemplary illustrations and positions of brake discs, friction rings, cooling bodies, wheel hubs, cooling channels and the like in the respective figures. These terms should not be construed as limiting, i.e., these references may vary due to different operating positions or mirror-symmetrical designs, etc.
In fig. 1 and 2, reference numeral 1 generally designates an embodiment variant of a shaft brake disc 1 for a rail vehicle according to the invention.
As shown in fig. 1, the shaft brake disk 1 has a first friction ring 2 and a second friction ring 4, which is arranged parallel to the first friction ring and at a distance therefrom.
On the inner edges of the friction rings 2, 4 facing the hub 6, means are formed for fixing the shaft brake disc 1 on a web 7 extending radially outward from the hub 6. The friction rings 2, 4 are designed here as separate components.
The two friction rings 2, 4 are preferably designed symmetrically with respect to the mirror image in the center between the friction rings 2, 4 and perpendicular to the axis of rotation D of the shaft brake disk 1.
In order to fix the shaft brake disk 1 on the hub 6 placed on the shaft 5, a plurality of devices designed as friction ring webs 14 extend radially inward from the radially inner circumferential surfaces 16 of the friction rings 2, 4, as shown in the embodiment variant in fig. 1.
Correspondingly, the web 7 extends radially outwardly from the hub 6.
As can also be seen from fig. 1, the respective webs 7 of the hub 6 are clamped between the mutually opposite friction ring webs 14 of the first friction ring 2 and of the second friction ring 4.
In order to fix the shaft brake disk 1 on the wheel hub 6, screws are guided through the openings of the friction-ring webs 14 and the webs 7, which screws serve to fix the friction-ring webs 14 to the corresponding webs 7 of the wheel hub 6.
This results in a two-part connection between the friction ring web 14 and the web 7 of the hub 6, as a result of which an increase in the torque that can be transmitted during braking can be achieved.
A reduction in the number of connection points between the shaft brake disk 1 and the hub 6, which are formed by the connection plates 7 and the friction ring connection plates 14, can also be achieved due to the greater transmissible torque.
In the embodiment variant shown in fig. 2, a hub 6 with a radially outwardly extending web 7, the ends of which bear against the inner faces of the friction rings 2, 4 and have holes through which screws can be guided, are used to fix the friction rings 2, 4 to the respective web 7 of the hub 6, for fixing the shaft brake disk 1 to the shaft 5.
Between the friction rings 2, 4, the shaft brake disk 1 has a cooling body 3 connected to the friction rings 2, 4 in the two embodiment variants shown in fig. 1 and 2.
The heat sink 3 is also designed as a component that is produced separately from the friction rings 2, 4. The friction rings 2, 4 and the heat sink 3 are connected to one another in a form-locking, force-locking or material-locking manner.
The friction ring 2 shown in fig. 2 can be constructed as a solid casting. Preferably, the friction rings 2, 4 are configured as stampings, mills or forgings.
In the embodiment variant shown in fig. 1, the heat sink 3 is designed as a flat plate 11 and as alternating layers of a corrugated or trapezoidal bent or folded intermediate element 12 arranged parallel to the friction surfaces of the friction ring 2 or friction rings 2, 4.
The corrugated or trapezoidal bent or folded intermediate element 12 forms the cooling channel 10 with the sheet material 11 surrounding the intermediate element.
On the contact surfaces with the respective inner faces of the friction rings 2, 4, the intermediate element 12 can form a cooling channel 10 together with the inner faces of the friction rings 2, 4.
It is also conceivable to omit the sheet metal 11, so that, as in the embodiment variant shown in fig. 2, the heat sink 3 is designed as a layer of a corrugated or trapezoidal bent or folded intermediate element 12 which is arranged parallel to the friction surfaces of the friction ring 2 or of the friction rings 2, 4. Here, superimposed undulated or trapezoidally curved or folded intermediate elements 12 or intermediate elements 12 form the cooling channel 10 together with the inner face of the friction ring 2.
The wave orientation of the intermediate element 12 is preferably designed such that the cooling channels 10 extend radially with respect to the axis of rotation of the friction ring 2. It is also conceivable for the cooling duct 10 to be oriented obliquely to the axis of rotation of the friction ring 2.
As shown in fig. 1, the cooling body 3 is accommodated between two friction rings 2, 4 of a shaft brake disk 1.
Alternatively, the heat sink 3 can also be designed as a component produced using a 3D printing process or as a sheet metal part or a sintered part.
It is also conceivable for the heat sink 3 to be designed as a cast part. It is also conceivable to produce the cooling body 3 from a solid material from which the cooling channels 10 are produced.
In the embodiment of the cooling body 3 shown in fig. 1 and 2, the flat plate 11 and the corrugated or trapezoidal bent or folded intermediate element 12 are designed as a circular ring, viewed parallel to the friction surface of the friction ring 2.
It is also conceivable that the sheet 11 and/or the intermediate element 12 is configured, for example, only partially in the shape of a circular ring, and that a plurality of such sheets 11 and/or intermediate elements 12 are therefore arranged next to one another.
In order to reduce the efficiency of the air transport through the cooling body, it is also conceivable to provide holes or slits in the plate 11 and/or the intermediate element 12.
The connection of the sheet 11 and the intermediate element 12 to one another is preferably effected in a material-locking manner, for example by soldering or welding.
It is also conceivable that the flat sheet 11 and the intermediate element 12 are screwed to one another.
As fig. 1 also shows, the heat sink 3 has a plurality of spacer sleeves 9, which are oriented perpendicularly to the friction surface of the at least one friction ring 2 and bear against a rear side 15 of the at least one friction ring 2 facing away from the friction surface 13.
Screws or bolts can preferably be inserted into the spacer sleeves 9 from the friction surface 13 of the friction ring 2.
For this purpose, holes 8 are provided in the friction ring 2, into which corresponding screws or bolts can be inserted for fastening the friction ring 2 to a hub or wheel, and through which the cooling body 3 can be fastened to the friction ring 2.
In order to be able to achieve a compensating movement due to thermally induced expansion of the components of the heat sink 3, according to a further preferred embodiment variant, a spring element is provided between two or more of the plates 11.
The spring element is designed here, for example, as a disk spring.
List of reference numerals
1-shaft brake disc
2 Friction ring
3 Cooling body
4 friction ring
5 shaft
6 wheel hub
7 fixing element
8 holes
9 spacer sleeve
10 cooling channel
11 sheet material
12 intermediate element
13 friction surface
14 friction ring connecting plate
15 rear side
16 peripheral surface
17 holes
D axis of rotation
Claims (13)
1. Shaft brake disc (1) for a rail vehicle, having a first friction ring (2) and a second friction ring (4) arranged parallel to and at a spaced distance from the first friction ring, and means for fixing the shaft brake disc (1) on a web (7) extending radially outward from a hub (6), characterized in that the first friction ring (2) and the second friction ring (4) are configured as separate components, the hub (6) having a plurality of webs (7) extending radially outward for fixing the shaft brake disc (1) on a shaft (5), the ends of the webs bearing against the inner faces of the first friction ring (2) and the second friction ring (4) and having holes through which screws can be guided for fixing the first friction ring (2) and the second friction ring (4) with the respective webs (7) on the hub (6), a cooling body (3) designed as a separate component is accommodated between the first friction ring (2) and the second friction ring (4), said cooling body being connected to the first friction ring (2) and the second friction ring (4) in a form-fitting, force-fitting or material-fitting manner, and the connecting plate (7) extends into the cooling body (3).
2. Shaft brake disc (1) according to claim 1, characterized in that the first friction ring (2) and the second friction ring (4) are configured as a stamping or forging.
3. Shaft brake disc (1) according to claim 1, characterized in that the first friction ring (2) and the second friction ring (4) are manufactured from a semi-finished product by means of laser beam cutting/water jet cutting.
4. Shaft brake disc (1) according to one of claims 1 to 3, characterized in that the first friction ring (2) and the second friction ring (4) of the shaft brake disc are symmetrical with respect to a mirror image in the center between the first friction ring (2) and the second friction ring (4) and perpendicular to the axis of rotation (D) of the shaft brake disc (1).
5. Shaft brake disc (1) according to one of claims 1 to 3, characterized in that at least a part of the means is configured as a friction ring web (14) extending radially inwards towards the axis of rotation (D) of the shaft brake disc (1).
6. Shaft brake disc (1) according to one of claims 1 to 3, characterized in that at least one part of the means is configured as a through hole in the first friction ring (2) and the second friction ring (4) perpendicular to the friction surfaces of the first friction ring (2) and the second friction ring (4), into which a bolt for fixing the first friction ring (2) and the second friction ring (4) on a web (7) extending radially outwards from the hub (6) can be inserted.
7. Shaft brake disc (1) according to claim 1, characterized in that the cooling body (3) is configured as a 3D print, sheet, sintered or cast piece or consists of a solid material from which the cooling channels (10) are machined.
8. Shaft brake disc (1) according to claim 1, characterized in that the cooling body (3) is configured as a layer of an undulated or trapezoidally curved or folded intermediate element (12) which is arranged parallel to the friction surface of the first friction ring (2) or the second friction ring (4) for forming a cooling channel (10).
9. Shaft brake disc (1) according to claim 1, characterized in that the cooling body (3) is configured as a flat sheet metal (11) and as alternating layers of an undulated or trapezoidally bent or folded intermediate element (12) arranged parallel to the friction surfaces of the first friction ring (2) or the second friction ring (4) for forming a cooling channel (10).
10. Shaft brake disc (1) according to claim 9, characterized in that the plate (11) and/or the intermediate element (12) is configured as a circular ring when viewed parallel to the friction surface of the first friction ring (2) or the second friction ring (4).
11. Shaft brake disc (1) according to claim 1, characterized in that the cooling body (3) has a plurality of spacer sleeves (9) which are oriented perpendicularly to the friction surface of at least one of the first friction ring (2) and the second friction ring (4) and bear against a rear side (15) of the at least one friction ring facing away from the friction surface (13).
12. Shaft brake disc/hub connection for a rail vehicle, wherein the shaft brake disc (1) has a first friction ring (2) and a second friction ring (4) arranged parallel to and at a distance from the first friction ring, and the hub (6) has a radially outwardly extending web (7), characterized in that the shaft brake disc (1) is constructed according to any one of claims 1 to 11.
13. Shaft brake disc/hub connection according to claim 12, characterized in that the respective web (7) of the hub (6) in the connection position is accommodated between the friction ring web (14) of the first friction ring (2) and the friction ring web of the second friction ring (4).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018101920.3A DE102018101920A1 (en) | 2018-01-29 | 2018-01-29 | Shaft brake disc and shaft brake discs / hub connection |
DE102018101920.3 | 2018-01-29 | ||
PCT/EP2019/051346 WO2019145249A1 (en) | 2018-01-29 | 2019-01-21 | Axle-mounted brake disc and axle-mounted brake disc-hub connection |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111656042A CN111656042A (en) | 2020-09-11 |
CN111656042B true CN111656042B (en) | 2022-09-23 |
Family
ID=65516454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201980010533.9A Active CN111656042B (en) | 2018-01-29 | 2019-01-21 | Shaft brake disc and shaft brake disc/hub connection |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN111656042B (en) |
DE (1) | DE102018101920A1 (en) |
WO (1) | WO2019145249A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB542762A (en) * | 1939-03-17 | 1942-01-27 | Budd Wheel Co | Improvements in or relating to brakes |
WO2006005526A1 (en) * | 2004-07-13 | 2006-01-19 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Axle shaft comprising an electromechanically or pneumatically actuated disc brake |
WO2009080135A1 (en) * | 2007-12-20 | 2009-07-02 | Daimler Ag | Brake disc for a motor vehicle |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1132950B (en) * | 1959-09-09 | 1962-07-12 | Bergische Stahlindustrie | Brake disc |
DE1625827C3 (en) * | 1967-09-20 | 1975-04-24 | Alfred Teves Gmbh, 6000 Frankfurt | Ventilated brake disc with two friction rings |
GB1540720A (en) * | 1975-04-08 | 1979-02-14 | Girling Ltd | Rotatable braking members |
DE3223405C2 (en) * | 1982-06-23 | 1984-09-20 | Daimler-Benz Ag, 7000 Stuttgart | Brake disc designed as a rotating heat pipe |
DE3612896A1 (en) * | 1986-04-17 | 1987-10-29 | Schwaebische Huettenwerke Gmbh | BRAKE DISC DEVICE |
DE3740912A1 (en) * | 1987-12-03 | 1989-06-15 | Buderus Kundenguss | USE OF A CAST IRON TYPE FOR BRAKE BODY |
FR2697218B1 (en) * | 1992-10-26 | 1994-12-16 | Alsthom Gec | Braking system for rail vehicles using carbon-based materials. |
US20080142319A1 (en) * | 2006-12-14 | 2008-06-19 | Gary Manter | Brake rotor having corrugated fin structure |
DE102008003923A1 (en) * | 2008-01-11 | 2009-07-30 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | A rail |
DE102011101432B4 (en) * | 2011-05-10 | 2015-01-22 | Daimler Ag | brake disc |
DE202011052265U1 (en) * | 2011-12-12 | 2013-03-13 | Faiveley Transport Witten Gmbh | Built shaft brake disk |
DE202011052267U1 (en) * | 2011-12-12 | 2013-03-13 | Faiveley Transport Witten Gmbh | Built shaft brake disk |
DE102013201303A1 (en) * | 2012-02-14 | 2013-08-14 | Continental Teves Ag & Co. Ohg | Internally ventilated automotive brake disc made of fiber composite material |
CN105134838B (en) * | 2015-07-21 | 2017-07-11 | 中车青岛四方车辆研究所有限公司 | Bullet train wheel with slide block structure is brake disk mounted and installation method |
-
2018
- 2018-01-29 DE DE102018101920.3A patent/DE102018101920A1/en not_active Withdrawn
-
2019
- 2019-01-21 CN CN201980010533.9A patent/CN111656042B/en active Active
- 2019-01-21 WO PCT/EP2019/051346 patent/WO2019145249A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB542762A (en) * | 1939-03-17 | 1942-01-27 | Budd Wheel Co | Improvements in or relating to brakes |
WO2006005526A1 (en) * | 2004-07-13 | 2006-01-19 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Axle shaft comprising an electromechanically or pneumatically actuated disc brake |
WO2009080135A1 (en) * | 2007-12-20 | 2009-07-02 | Daimler Ag | Brake disc for a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
DE102018101920A1 (en) | 2019-08-01 |
CN111656042A (en) | 2020-09-11 |
WO2019145249A1 (en) | 2019-08-01 |
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