Patent Application
20240376945
The present invention relates to a caliper for a disc brake, for example for a motor vehicle, as well as a control system and a motor vehicle comprising such a disc brake caliper.
In particular, in a disc brake, the brake caliper is arranged straddling the peripheral outer margin of a brake disc. The brake caliper usually comprises a body having two elongated elements, or portions, which are arranged so as to face opposite braking surfaces of a disc. Clutch pads are provided arranged between each elongated element of the caliper and the braking surfaces of the brake disc. At least one of the elongated elements of the caliper body has at least one cylinder adapted to accommodate a hydraulic piston capable of applying a thrust action to the pads, abutting them against the braking surfaces of the disc to apply a braking action to the vehicle.
The brake calipers usually are constrained to a support structure which remains firmly connected to the vehicle, such as, for example a suspension of a vehicle, more particularly a fork or swingarm of the suspension of a motor vehicle.
In a conventional arrangement, one of the two elongated elements has two or more attachment portions of the caliper body to the support structure, for example by providing slots or eyelets, for example arranged axially, or through holes, for example arranged radially, adapted to receive screws for fixing the caliper, which are accommodated with the ends thereof in threaded holes provided on the caliper support.
In a conventional caliper body construction, the elongated elements arranged facing the braking surfaces of the disc are connected together by bridge-like elements arranged straddling the disc.
A caliper body of this type is described in JP2008045737A. FIG. 1 of JP2008045737A shows a caliper body of the floating caliper type, placed straddling a brake disc. This caliper body comprises two elongated elements, the ends of which are mutually connected by bridges.
The caliper comprises various components mounted to the body, such as pistons, seals, bleed devices and brake fluid feeding pipes.
Conventionally, the caliper body is made of metal, such as, for example aluminum or aluminum alloy or cast iron. The caliper body can be obtained by casting, but also by mechanical stock removal machining, as well as forging.
Desiring to stop or decelerate the vehicle, the driver applies a force to the brake pedal, in the case of a motor vehicle. Such a force on the brake pedal applies, through a brake pump, a brake fluid pressure which, through a pipe, is applied to the brake fluid present in the hydraulic circuit placed inside the caliper body to reach the cylinders where the pressure is applied to the bottom surface of the bottom of the pistons, thus forcing them to close against the pads, which in turn abut against the braking surfaces of the disc.
The pressure action of the brake fluid is also applied to the bottom wall of the cylinder, thus causing a reaction in the caliper body which deforms it away from the disc surfaces. This deformation of the caliper body leads to an increase in the piston stroke, and thus to an increase in the brake pedal stroke.
The caliper body also deforms as a function of the torque applied by the action of the pistons which, by abutting the pads against the braking surfaces of the disc, apply a deformation moment in directions which form torque arms with respect to the fixing points of the caliper body to the support thereof. These torques also deform the caliper body in a tangential and radial direction with respect to the disc, as well as in an axial direction.
Therefore, the caliper body must have sufficient structural rigidity so as to ensure that this deformation of the caliper body caused by the braking action is maintained within acceptable values, which in addition to avoiding damage to the braking system, do not create the feeling of a yielding braking system to the driver, thus resulting in an extra travel of the lever or pedal of the braking system and creating a “spongy” system feeling. This need urges having highly rigid structures for the bodies of the calipers, and thus increasing the overall size and weight thereof.
On the other hand, since the caliper body is constrained to the vehicle suspension and arranged straddling the disc, it is one of the unsprung masses intended to be reduced as much as possible in order to increase vehicle performance.
JP2008045737A shows a caliper on which a protective shield is mounted which carries a recessed LED or LCD monitor for showing the light warnings.
Furthermore, JP2008045737A shows a solution in which there is provided a light tube which is fastened to both ends of the caliper and extends around the braking surface externally facing the vehicle.
Further examples are given by publications US2009141514A1, U.S. Pat. Nos. 5,259,483, 7,144,142, US2004042227. All these solutions have light sources and also diffusers which are placed or recessed in covers or shields applied to the caliper bodies, or light sources surrounding the brake disc.
Therefore, there remains a strong need to propose the lighting of a wide area around the brake with at least one individual light source, and in particular, above the caliper body, away from the brake and from the disc, that is radially externally to the brake so as to illuminate at least a part of the vehicle and not just the brake or wheel alone, when required.
Simultaneously, there remains a strong need for this lighting source to be energy efficient.
These and further objects are achieved by a brake caliper as described in claim 1 appended hereto, as well as a motor vehicle according to claim 8 and a lighting system of a disc brake as described in claim 9.
Further objects, solutions and advantages are present in the embodiments described below and claimed in the dependent claims appended hereto.
Various embodiments of the invention are now described below through embodiments provided by mere way of non-limiting example, while in particular referencing the accompanying drawings, in which:
According to a general embodiment, a brake caliper 1 for a disc brake 2 is provided.
Said brake caliper 1 is adapted to be arranged straddling a braking band 3 of a brake disc 4 having at least one first and one second braking surface 5, 6 arranged opposite to each other.
Said disc 4 defines an axial direction A-A parallel to a rotation axis a-a thereof, a circumferential direction C-C parallel to one of said braking surfaces 5, 6 and orthogonal to said axial direction A-A, and a radial direction R-R orthogonal to the axial direction A-A and to the circumferential direction C-C, the latter defining an outer radial orientation RO when facing away from the rotation axis a-a of the brake disc 4.
Said brake caliper 1 comprises a caliper body 7.
Said caliper body 7 body comprises a first caliper portion 8 adapted to face the first braking surface 5.
Said caliper body 7 comprises a second caliper body portion 9 adapted to face the second braking surface 6.
Said caliper body 7 comprises at least one bridge 10 which connects said first caliper body portion 8 to said second caliper body portion 9.
Said caliper body 7 comprises an outer caliper body surface 11 arranged opposite to, that is facing away from, said braking band 3.
At least one of said first and second caliper body portion 8, 9 accommodates a thrust element 12 adapted to urge at least one pad 13, 14 to abut against at least one of said first or second braking surface 5, 6.
At least one light lamella 15 overhangingly protrudes from at least one portion of said outer caliper body surface 11.
Said light lamella 15 comprises at least one plate 16 made of transparent or translucent material having at least two opposite plate surfaces 17, 18 and plate edges 19 which join said plate surfaces 17, 18.
Said plate 16 comprises a predefined plate thickness 20 adapted to cause at least one light radiation to pass.
Said plate comprises at least one side edge facing said caliper body 21.
Said light lamella 15 further comprises at least one lighting body 22.
Said lighting body 22 comprises at least one light source, for example an LED 23 or an optical fiber 36, in particular an emission portion of light radiation 37 of the optical fiber 36.
Said lighting body 22 is associated with said side edge facing said caliper body 21 so as to transmit, when activated, the light radiation thereof into the plate thickness 20 so that said light radiation, or part thereof, is distributed by the opposite plate surfaces 17, 18 and/or by the plate edges 19 externally facing said caliper body 7.
According to an embodiment, said light source is an LED 23, that is a light emitting diode, or said light source is an optical fiber 36.
According to an embodiment, said light source is an emission portion of a light radiation 37 of an optical fiber 36.
According to an embodiment, said brake caliper 1 comprises at least one light lamella groove 24; and wherein said at least one light lamella groove 24 accommodates at least one portion of said side edge 21 and one portion of said lighting body 22.
According to an embodiment, said brake caliper 1 comprises at least one light lamella groove 24; and wherein said at least one light lamella groove 24 accommodates at least one portion of said side edge 21 and entirely said lighting body 22.
According to an embodiment, said brake caliper 1 comprises at least one light lamella groove 24; and wherein said at least one light lamella groove 24 accommodates at least one portion of said side edge 21 and one portion of said lighting body 22 and also an optical fiber cable or extension 25 which connects said lighting body 22 to a feeder or emitter 26.
According to an embodiment, said brake caliper 1 comprises at least one light lamella groove 24; and wherein said at least one light lamella groove 24 accommodates at least one portion of said side edge 21 and one portion of said lighting body 22 and also an optical fiber cable or extension 25 which connects said lighting body 22 to a feeder or emitter 26; said feeder or emitter 26 is controlled in controlled manner to actuate and regulate the intensity and/or color of said light source 23, 36 and/or the activation time.
According to an embodiment, said brake caliper 1 comprises at least one light lamella groove 24; and wherein said at least one light lamella groove 24 accommodates at least one portion of said side edge 21 and one portion of said lighting body 22 and also an optical fiber cable or extension 25 which connects said lighting body 22 to a feeder or emitter 26; said feeder or emitter 26 is controlled in controlled manner to actuate and regulate the intensity and/or color of said light source 23, 36 and/or the activation time according to an operating status of the vehicle.
According to an embodiment, said brake caliper 1 comprises a light lamella groove 24; and wherein said light lamella groove 24 is made in said caliper body 7 and accommodates at least one portion of said side edge 21 and one portion of said lighting body 22.
According to an embodiment, said brake caliper 1 comprises a caliper shell 27.
Said caliper shell 27 at least partially surrounds said caliper body 7, at least partially covering said outer caliper body surface 11, and couples to said caliper body 7.
Said brake caliper 1 comprises a light lamella groove 24; and wherein said light lamella groove 24 is made in said caliper shell 27 and accommodates at least one portion of said side edge 21 and one portion of said lighting body 22.
According to an embodiment, said brake caliper 1 comprises a caliper shell 27.
Said caliper shell 27 is snap-coupled to said caliper body 7.
According to an embodiment, said caliper shell 27 comprises at least one electrical connector 28 which, when the caliper shell 27 is connected to the caliper body 7, is electrically connected electrical caliper connector 29 provided in the caliper body 7.
According to an embodiment, said caliper shell 27 comprises at least one protective shell layer 30 which protects said at least one light lamella 15 from heat and stresses developed during a braking action.
According to an embodiment, said at least one plate 16 comprises polymethyl methacrylate (PMMA, abbreviated), for example also known as Plexiglas®.
According to an embodiment, said two opposite plate surfaces 17, 18 are arranged parallel to each other.
According to an embodiment, said at least one plate 16 is oriented in axial direction A-A, that is it arranges said plate surfaces 17, 18 so that they comprise an axial direction A-A.
According to an embodiment, said at least one plate 16 is at least two plates 16 arranged with plate surfaces 17 or 18 at least partially facing each other and parallel.
According to an embodiment, said at least one plate 16 is at least a plurality of plates 16.
According to an embodiment, said at least one plate 16 is at least a plurality of plates 16 arranged so that the distance between each plate 16 and the adjacent one is less than the protruding cantilevered extension of each of the two facing plates 16.
According to an embodiment, said at least one plate 16 is arranged longitudinal to said at least one bridge 10 and runs at least a portion of bridge 10.
According to an embodiment, said at least one plate 16 is arranged longitudinally to said at least one bridge 10 and runs all of said at least one bridge 10.
According to an embodiment, said plate edges 19 form a polygonal outline.
According to an embodiment, said plate edges 19 form a polygonal outline with rounded corners.
According to an embodiment, said at least one sheet 16 overhangingly protrudes from at least three sides of the caliper body 7.
According to an embodiment, said at least one plate 16 overhangingly protrudes with portions thereof in at least three orientations in at least two directions.
According to an embodiment, said at least one sheet 16 overhangingly protrudes from at least three sides of the caliper body 7, in particular in radial direction R-R and in the two opposite orientations of the axial direction A-A, towards the vehicle and away from the vehicle.
The present invention likewise relates to a disc brake comprising a brake caliper 1 according to any one of the above-described embodiments, and to a brake disc 4.
The present invention likewise relates to a motor vehicle 35 comprising a disc brake 2 which comprises at least one brake caliper 1 according to any one of the above-described embodiments.
The present invention likewise relates to a lighting system of a disc brake 33 comprising:
According to an embodiment, there is further comprised an operating connection of the at least one light source feeder or emitter 26 and at least one vehicle control unit 34 which receives the driving statuses of the vehicle and/or of the individual components of the vehicle, and in particular the various driving statuses of the braking system, and based on these statuses, transmits various light controls, such as intensity and/or duration and/or color, to said at least one light source feeder or emitter 26 to control said at least one light source, for example at least one LED or optical fiber 36, and emit a light radiation based on the driving statuses of the vehicle and/or of the individual components of the vehicle.
By virtue of the present invention, the lines at the sides and on the upper part characterizing the ribs of the caliper are reinterpreted with evolved plastic elements formed by dynamic solids and voids which are essential in the immediacy and formal consistency thereof.
The design aims to employ new technologies. Shape and function are enhanced by the LED/optical fiber technology which simultaneously becomes interface, directly dialoging with the user, or aesthetical choice, adapting to the tastes and preferences thereof.
By virtue of the wireless technologies, the brake caliper may indeed interface with the user, communicating data and information on the status of the vehicle and the caliper itself, such as, for example pad wear, thus signaling any anomalies.
The solution proposed may be integrated with GPS functions, and therefore serve to find the parked vehicle also by the emission of courtesy lights.
For the purpose of safety, the brake caliper may automatically block or release the vehicle by means of wireless connection, for example Bluetooth®, when the user is in the vicinity of the vehicle provided with this invention.
The caliper of the present invention may be directly integrated in the vehicle system, becoming functional with the signaling system.
Furthermore, the proposed solution may be adapted to the color scheme of the vehicle or the user's mood.
Therefore, the proposed caliper solution is “smart”, electronic, efficient, adaptable, empathetic.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102021000010610 | Apr 2021 | IT | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/IB2022/053884 | 4/27/2022 | WO |
