EP4605662A1 - Protecteur de disque de frein - Google Patents
Protecteur de disque de freinInfo
- Publication number
- EP4605662A1 EP4605662A1 EP23792987.2A EP23792987A EP4605662A1 EP 4605662 A1 EP4605662 A1 EP 4605662A1 EP 23792987 A EP23792987 A EP 23792987A EP 4605662 A1 EP4605662 A1 EP 4605662A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blades
- blade
- brake disc
- disc
- sbi
- 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.)
- Pending
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
- F16D65/005—Components of axially engaging brakes not otherwise provided for
- F16D65/0081—Brake covers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
- B60B7/0013—Hub caps
- B60B7/002—Hub caps being of the ventilated type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
- B60B7/0026—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface
- B60B7/0066—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface structure
- B60B7/0086—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins characterised by the surface the dominant aspect being the surface structure having cooling fins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T5/00—Vehicle modifications to facilitate cooling of brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/78—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0037—Protective covers
Definitions
- a particularly interesting application of the invention concerns a sudden braking condition, which can affect the property of the material which in turn will degrade the braking performance, in the case where cooling is not sufficient.
- brake cooling performance is essential in determining the thermal load or critical temperature of the disc which can potentially affect the material property and desired shape of the disc. This will in turn degrade braking performance.
- hot air from the disk must be exhausted at a rapid rate.
- a brake disc protector device for a vehicle, particularly for a motor vehicle, comprising: a) a central base ring securing the brake disc protector device to a non structural rotary vehicle, b) a blade type envelope having a generally substantially circular shape having a maximum angular extent of approximately 300°, the blade type envelope extending from one end of the ring of central base and comprising a first structure extending in a plane substantially perpendicular to an axis of revolution of the central base ring, the first structure comprising a first series of blades, each blade of the first structure extending radially on the angular extent of the blade type envelope with an angle of inclination relative to the plane substantially perpendicular to an axis of revolution of the central base ring, and the first structure is secured to the central base ring.
- the extent of the blade type shroud is designed to provide a cutout on an angular portion of the circular area for a yoke space.
- the first structure extends in a plane parallel to a brake disc track surface and thanks to the angle of inclination each blade of the first structure extends radially in a plane not parallel to the surface of the brake disc. brake disc track so that they can expel hot air from the inner, or internal, track surface of the disc.
- This disc protector which can also be one-piece, incorporating blade structures in front of the disc tracks, allows the brake disc to be cooled more quickly, over a larger area and more efficiently. Thus, hot air is no longer accumulated between the brake disc and the disc protector, no longer degrading the performance of the disc brake thanks to the blade structure design further exposing the disc to the ambient air.
- the blade type envelope comprises arcs with a U-shaped profile overhanging the central base ring and in each arc a first branch of the two parallel U branches forms part of the first structure, and preferably a blade forming part of the first series of blades.
- the brake disc protector is configured to at least partially surround a brake disc, defining a volume in which the disc is located, partially enveloping it and covering exposed regions of the disc to protect them.
- each U-shaped profile arc of the blade type envelope also includes:
- each blade of the second structure extends extending radially with an angle of inclination different from zero relative to the plane in which the second structure extends
- the peripheral structure extends in a plane substantially perpendicular to the planes in which extend the first and second structures.
- the second structure extends substantially parallel to the brake disc track surface, and thanks to the angle of inclination its blades extend in a plane not parallel to the brake disc track surface so that they can expel hot air from the outer, or outer, track surface of the disc.
- the first structure is located further inside relative to the vehicle than the second structure and each second branch of the U-shaped profile arc is continuously attached to a blade of the first series via one of the connecting parts, the arc overhanging the central base ring.
- the blades of the blade type envelope are flat and/or helical, either to simplify manufacturing or to improve the evacuation of hot air.
- the second series of blades comprises more blades than the first series of blades, in order to better protect the internal disk track against splashes.
- the blades of the blade type envelope are inclined relative to the plane in which the structure to which they belong extends by an angle of 30 to 60°, and preferably of 45°, this inclination of the surface Brake disc track improves cooling efficiency.
- the central base ring and/or the blade type casing are made of metallic material or plastic material or ceramic material, so that they can withstand temperatures up to 300 “Celsius.
- the blades forming part of a series of blades are spaced regularly in an angular manner, and preferably the spacing between two blades forming part of a series of blades is in the range of 2 to 23 degrees in angle, in order to better blow hot air out of the disc tracks.
- the blades of the first series of blades are spaced regularly in an angular manner, and preferably the maximum spacing between two blades of the first series of blades is approximately 2.8 degrees in angle, in order to better protect the disc against splashes, mud or the like.
- the blade length of at least some of the blades of the blade type casing is greater than or equal to a brake disc track width, in order to maximize the cooling surface on the disc track surface of brake and such that in the presence of an arc, the arc surrounds the disc.
- the blade type envelope leaves a space of at least 1 millimeter, preferably at most 3 millimeters, with a brake disc track surface to better expel hot air from the disc track surface.
- the second structure covers an angular extent less than the angular extent of the blade type envelope, partially overlapping the first structure of the blade type envelope, preferably its upper extent section, and preferably the angular extent of the second structure is a maximum of 180 degrees, in order to optimize the weight by limiting the second structure to the necessary cooling zone.
- the subject of the invention is also a method of manufacturing a device forming a brake disc protector according to any one of the preceding claims, characterized in that it comprises, in combination, the following steps: a) - formation a central base ring and a blade type shroud, preferably by stamping from a metal plate or through a plastic injection molding process, or through a process of ceramic casting, and b) - assembly of the central base ring to the first structure of the blade type envelope, preferably by welding or brazing. This process does not require complex tools and ensures the robustness of the disc protector thus manufactured.
- the subject of the invention is also a disc brake assembly comprising a steering knuckle of a wheel assembly, a caliper, a brake disc and a brake disc protector device according to the invention having the same qualities as mentioned previously.
- FIG. 1 is a basic diagram representing the environment of a brake disc in a vehicle according to the prior art with a classic disc protector
- FIG 2a], [Fig 2b] and [Fig 2c] are schematic views of the disc, the caliper and the blades: top view, side view from the outside in the direction of the width of the vehicle , side view from the inside in the width direction of the vehicle; illustrating the position of the blades according to one embodiment of the invention
- [Fig 3] is a perspective view of the disc brake assembly illustrating the position of blades on each side of the disc in a preferred embodiment of the invention
- [Fig 4] is a side view of the disc brake assembly from the inside in the width direction of the vehicle in a preferred embodiment of the invention
- [Fig 5] is a top view of the disc brake assembly in a preferred embodiment of the invention
- FIG 6 is a top view of the disc brake assembly in a preferred embodiment of the invention
- FIG. 10 shows a comparison of the near-wall fluid temperature between a conventional disc protector and the disc protector according to a preferred embodiment of the invention.
- FIG. 1 1 represents a comparison of thermal transfer coefficient between a conventional disk protector and the disk protector according to a preferred embodiment of the invention.
- directions and orientations refer to a direct orthonormal reference frame XYZ, where X is the longitudinal direction of the vehicle, Y is the transverse direction of the vehicle, pointing outward from the vehicle and Z is the vertical direction pointing upwards.
- the term “substantially” means that a slight deviation from a certain nominal position or orientation is admissible, for example “substantially vertical” means that a deviation of the order of 10° from a Strictly vertical orientation is permissible in the context of the invention, and the term “approximately” implies a tolerance of 5% from the nominal value indicated.
- identical or similar elements are identified by identical reference signs in all figures.
- the disc brake used while a vehicle is moving, comprises a brake disc D also called a disc brake rotor disposed on one side of inner diameter of a rim R of a wheel and a caliper C which interposes and retains the brake disc D with the brake pads P.
- a brake disc D also called a disc brake rotor disposed on one side of inner diameter of a rim R of a wheel and a caliper C which interposes and retains the brake disc D with the brake pads P.
- a conventional disc protector in the form of a plate, CDP is arranged adjacent to the brake disc D facing the internal surface, or track, of the disc brake rotor in the width direction of the vehicle and so as to overlap at least part of the disc brake rotor, viewed from an axle direction of the wheel in an installed state where the disc protector is installed in the vehicle, in order to protect, for example, the disc against foreign matter such as dust, a small stone and l 'muddy water.
- a planar shape of the disc protector seen in the width direction of the vehicle is typically a shape of disc substantially concentric with the rotor or a sectoral shape provided with a cutout to produce space for the caliper C.
- Such a conventional disc protector creates inhomogeneity in the disc, in particular between its distal track and its proximal track relative to the center of the wheel axle concerned, respectively also called external track and internal track, significantly decreasing the value of overall heat transfer coefficient of the internal track and also increasing the cooling constant, compared to a disc without protector.
- the brake disc protector comprises:
- a blade type envelope having a generally substantially circular shape having a maximum angular extent of approximately 300°, in order to provide a cutout on an angular part of the circular area for a stirrup space
- the blade type envelope blades comprising a first structure extending substantially parallel to a brake disc track surface and comprising a first series of blades Bi, each blade of the first structure extending radially over the angular extent of the type envelope blades in a plane not parallel to the brake disc track surface and the first structure is secured to the central base ring.
- blade refers to a wide, flat part used to push air, such as a propeller rotor or fan blade, and is used here as such to refer to an object that is flat, thin and long and by extension with a fin which is not necessarily flat.
- the central base ring and/or blade type casing are made of metal, preferably aluminum or steel, or plastic which can withstand more than 300°C, or ceramic material.
- the central base may have the same characteristics with respect to the blade type casing of maximum angular extent of approximately 300°, preferably 270°C, in order to provide a cut out on an angular part of the circular area for a stirrup space.
- FIG. 2a the preferred embodiment with bilateral blade structures of the blade type shroud is sketched with only one blade on each side, to illustrate this embodiment with a simplified view.
- Each blade of the blade type casing extends radially in a plane not parallel to the brake disc track surface Ti, Te of the brake disc D.
- the blade Bi extends laterally from the proximal track towards the interior of the vehicle illustrates the preferred orientation of the first series of blades Bi, also called internal blades Bi.
- the blade Be extending laterally from the distal track towards the outer periphery of the vehicle illustrates the preferred orientation of the second series of blades Be, also called external blades Be.
- All the blades of a series virtually cross each other at the center of the axle spindle, whatever the orientation chosen, if they were connected to each other all the blades of each series of blades would form like a surface of revolution, the axis of revolution being the axis passing through the center of the central base ring perpendicular to the track surfaces, a surface of revolution being a surface in Euclidean space created by rotation of a curve (the generator) around a straight line in its plane (the axis).
- the caliper On the outer track side, with the classic CDP protector, the caliper itself acts as a major flow separator which itself improves the HTC in the lower half of the disc. Therefore, in the preferred DPI embodiment in which blades are present on the remaining region of the disk track, it is observed that due to the blades the HTC increases from 75 W/(m 2 .K) to 100 W/ (m 2 .K).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN202211060135 | 2022-10-20 | ||
| FR2214212A FR3144237B1 (fr) | 2022-12-22 | 2022-12-22 | Protecteur de disque de frein |
| PCT/EP2023/079203 WO2024084012A1 (fr) | 2022-10-20 | 2023-10-19 | Protecteur de disque de frein |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4605662A1 true EP4605662A1 (fr) | 2025-08-27 |
Family
ID=88505464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23792987.2A Pending EP4605662A1 (fr) | 2022-10-20 | 2023-10-19 | Protecteur de disque de frein |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4605662A1 (fr) |
| WO (1) | WO2024084012A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4174559A (en) * | 1978-02-09 | 1979-11-20 | J.J. & M. | Fastening method |
| DE102004044514A1 (de) * | 2004-09-15 | 2006-03-30 | Volkswagen Ag | Bremsenabdeckblech für eine Scheibenbremse |
| DE102014016235A1 (de) * | 2014-11-04 | 2016-05-04 | Man Truck & Bus Ag | Abschirmvorrichtung für eine Bremsscheibe |
| JP6475678B2 (ja) | 2016-10-05 | 2019-02-27 | 株式会社Subaru | ブレーキダストカバー |
-
2023
- 2023-10-19 EP EP23792987.2A patent/EP4605662A1/fr active Pending
- 2023-10-19 WO PCT/EP2023/079203 patent/WO2024084012A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024084012A1 (fr) | 2024-04-25 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20250515 |
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| AK | Designated contracting states |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
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