DE102022203428A1 - Brake disc for a vehicle - Google Patents

Abstract

The invention relates to a brake disc (2) for a vehicle, which can be rotated about an axis of rotation (4), with a base body (6), with at least one friction layer (8) which is subject to wear and which is fixed to the base body (6) and on the side facing away from the base body (6) has a braking surface (10), on which a braking means (12) rests when the vehicle is braked, making contact and causing wear, with a head element (14) which is on the side of the axis of rotation (4) facing the Base body (6) is fixed to the base body (6) and through which the brake disc (2) can be fixed in a rotationally fixed manner on a wheel hub of the vehicle and with at least one magnet unit (16), which comprises at least one magnetic means (18), through which magnetic or magnetizable Brake abrasion (20), in particular from the friction layer (8) and/or from the braking means (12), can be magnetically attracted, with at least one of the at least one magnetic means (18) being fixed to the head element (14) and/or with at least one of the at least a magnet means (18) is fixed to the base body (6).

Description

The invention relates to a brake disc for a vehicle.

When operating a motor vehicle, in particular when braking the motor vehicle, a braking agent is applied to a braking surface of a brake disc in a contacting and wear-producing manner. Due to the prevailing friction, it can never be completely avoided that particles of the friction layer of the brake disc or the brake fluid come off during braking and enter the environment.

The known brake discs consist entirely of gray cast iron or coated brake discs. The resulting abrasion, the brake particles, are metallic and can cause damage to the lungs and the human body.

One object of an exemplary embodiment of the invention is to propose a brake disc for a vehicle in which the number of brake particles released into the environment is reduced during a braking process.

This object is achieved by a brake disc for a vehicle, which is rotatable about an axis of rotation, with a base body, with at least one friction layer which is subject to wear, which is fixed to the base body and which has a braking surface on the side facing away from the base body, on which when braking of the vehicle touching a brake means and causing wear, with a head element which is fixed to the base body on the side of the base body facing the axis of rotation and through which the brake disc can be fixed in a rotationally fixed manner on a wheel hub of the vehicle and with at least one magnetic unit, which has at least one magnetic means comprises, through which magnetic or magnetizable brake abrasion, in particular from the friction layer and/or the braking means, can be magnetically attracted, wherein at least one of the at least one magnetic means is fixed to the head element and/or wherein at least one of the at least one magnetic means is fixed to the base body.

Because the brake disc comprises a magnetic unit which comprises at least one magnetic means through which magnetic or magnetizable brake abrasion, in particular from the friction layer and/or the braking means, can be magnetically attracted, the magnetic particles that are released during braking can be magnetically attracted by the magnetic means be attracted and held there. This reduces the number of particles that can enter the environment and which can be harmful to health.

The friction layer can contain iron. It can be made from cast iron, in particular gray cast iron, or from a coated brake disc in which stainless steel is applied to a base body. The braking agent may comprise brake pads, the main component of which comprises steel wool.

In embodiments of the brake disc, it proves to be advantageous if at least one of the at least one magnetic means of the magnetic unit comprises a magnetic body comprising a three-dimensional shape, a substantially flat magnetic film or a substantially flat magnetic tape.

If at least one of the at least one magnetic means of the magnet unit comprises a magnetic body with a three-dimensional shape, high magnetic forces can be exerted. This makes it possible to increase the number of particles generated by abrasion that are attracted by the magnetic means.

If at least one of the at least one magnetic means of the magnet unit comprises a substantially planar magnetic film or a substantially planar magnetic tape, the magnet unit can be designed to be compact and reduced in volume.

For example, embodiments are conceivable in which the magnet unit comprises at least one volumetric magnet body, which is then fixed to the head element. In this case, at least one magnetic means designed as a magnetic foil, magnetic coating or magnetic tape can be arranged on the base body, for example on a side of the base body facing away from the axis of rotation. Such a design proves to be advantageous because the three-dimensional magnetic body is fixed close to the axis of rotation and therefore the centrifugal forces acting on the magnetic body are lower than when arranged on the base body, since the distance to the axis of rotation is increased there and the centrifugal forces are greater.

The magnetic means of the magnet unit can basically be designed in any way. It proves to be advantageous if at least one of the at least one magnetic means of the magnet unit comprises a neodymium magnet or a hard ferrite magnet.

The at least one magnetic means of the magnetic unit can be attached easily and securely Fix the head element or on the base body if at least one of the at least one magnetic means is detachably fixed, in particular by means of screwing, or non-detachable, in particular by means of gluing, riveting, soldering or welding, on the head element or on the base body.

If the magnetic means is detachably fixed, in particular by means of a screw, to the head element or to the base body, the magnetic means can be easily replaced. This can prove to be particularly advantageous if, during long-term operation of the motor vehicle, the magnetic means is covered with magnetic particles in such a way that the brake disc needs to be replaced for safe operation.

In one embodiment of the brake disc it is provided that at least one of the at least one magnetic means on the surface facing away from the head element or the base body comprises at least one recess which recesses in the direction of the head element or base body.

Because at least one of the at least one magnetic means comprises at least one recess that recesses in the direction of the head element or base body on the surface facing away from the head element or base body, particles attracted by the at least one magnetic means can be stored or displaced into the recess and this ensures a sufficient distance between the magnetic means and the braking means over a long operating period of the brake disc.

In addition, it proves to be advantageous if the head element and/or the base body has a receiving section on or in which at least one of the at least one magnetic means of the magnetic unit is fixed at a contact-free distance from the brake means which generates wear.

The receiving section can basically be designed in any way. In a further development of the last-mentioned embodiment, it proves to be advantageous if the receiving section comprises at least one recess in the base body and/or in the head element, which is designed to be free of material, in particular if the recess extends completely or partially circumferentially along a circumferential direction with respect to the axis of rotation.

By forming the receiving section through a recess, the at least one magnetic means of the magnet unit can be supported and supported in the recess. In such a case, it proves to be advantageous if the recess comprises a cross section which is designed to correspond, in particular complementary, to the external shape of the at least one magnetic means.

In principle, it is conceivable that the head section comprises a surface that runs parallel to the braking surface. Embodiments of the brake disc are conceivable in which the head section comprises a surface which runs obliquely or transversely with respect to the braking surface and which in particular comprises the receiving section.

In order to increase the traffic safety of the brake disc, in particular to prevent components of the motor vehicle from being damaged by a magnetic means that is inadvertently released from the specified order, one embodiment of the brake disc comprises at least one cage-like holding means, which is on the side facing away from the base body or head element a magnetic means rests against the magnetic means and/or is arranged overhanging the magnetic means and which can be detachably or non-detachably fixed or fixed to the head element or to the base body.

The cage-like holding means can be fixed releasably, for example by screwing, or permanently, for example by welding, gluing or riveting.

The cage-like holding means can be produced easily and inexpensively if the cage-like holding means comprises a U-profile that is open on one side and with which the holding means encloses at least one of the at least one magnetic means on three sides.

In addition, in embodiments of the brake disc it is provided that the cage-like holding means comprises a magnetic or magnetizable material or that the cage-like holding means is formed from a non-magnetic or magnetizable material.

If the cage-like holding means in turn comprises a magnetic or magnetizable material, the cage-like holding means is itself also magnetized when arranged on the at least one magnetic means. As a result, particles of the cage-like holding means also adhere to the holding means.

In principle, it is conceivable that the magnet unit comprises a single magnetic means, which extends, for example, in a ring shape around the axis of rotation in the form of a closed ring or circle. In addition, embodiments are conceivable in which two magnetic means are provided which extend in a semicircle around the axis of rotation.

In addition, embodiments of the brake disc are conceivable in which the magnet unit comprises a plurality of magnetic means which are arranged in a uniformly distributed manner on the circumference of the head element or on the base body with respect to the axis of rotation.

In order to protect the at least one magnetic means of the magnet unit from corrosion, an exemplary embodiment of the brake disc comprises at least one coating which is applied at least on the side of the at least one magnetic means facing away from the head element.

The coating can, for example, form corrosion protection and include, for example, Geomet.

Finally, embodiments of the brake disc are conceivable in which the head element and the base body comprise two separate or separable components or in which the head element and the base body form a common, one-piece component.

If the head element and the base body comprise two separate or separable components, the head element can, for example, be fixed to the base body in a detachable or non-detachable manner. If the head element is detachably secured to the base body, it can, for example, be screwed to the base body.

If the head element and base body form a common, one-piece component, the brake disc can be designed with reduced components.

Further features, details and advantages of the invention result from the attached patent claims, from the graphic representation and subsequent description of two preferred embodiments of the brake disc.

• 1 Eine Draufsicht auf ein erstes Ausführungsbeispiel der Bremsscheibe;
• 2 Eine Draufsicht auf ein zweites Ausführungsbeispiel der Bremsscheibe.

In the drawing shows:

• 1 A top view of a first embodiment of the brake disc;
• 2 A top view of a second embodiment of the brake disc.

The figures show exemplary embodiments of a brake disc for a vehicle, which is provided overall with the reference number 2. The brake discs 2 can each be rotated about an axis of rotation 4. The brake discs 2 each comprise a base body 6 and at least one friction layer 8 that is subject to wear. The friction layer 8 that is subject to wear is fixed to the base body 6 and has a braking surface 10 on the side facing away from the base body 6. When braking the vehicle, a braking agent 12 can be applied to the braking surface 10 in a touching manner and causing wear.

In addition, the brake disc 2 comprises a head element 14, which is fixed to the base body 6 on the side of the base body 6 facing the axis of rotation 4 and through which the brake disc 2 can be fixed in a rotationally fixed manner on a wheel hub of the vehicle. In addition, the brake disc 2 includes a magnet unit 16, which includes at least one magnet means 18. Magnetic abrasion 20, in particular from the friction layer 8 and/or from the braking means 12, can be magnetically attracted by the magnetic means 18.

In the exemplary embodiments shown in the figures, the magnet unit 16 comprises a plurality of magnet means 18, each of which is fixed to the head element 14.

With the one in the 1 and 2 In the exemplary embodiments shown, the magnetic means 18 each comprise magnetic bodies which have a three-dimensional shape. These are permanently attached to the head element 14. Here, the plurality of magnetic means 18 are arranged evenly distributed on the circumference of the head element 14 with respect to the axis of rotation 4 with respect to the axis of rotation 4.

In the exemplary embodiments shown in the figures, the magnetic means 18 are each permanently arranged on the head element 14.

The head element 14 includes a surface 22 which runs obliquely with respect to the braking surface 10. This oblique surface 22 includes a receiving section 24 on which the magnetic means 18 are arranged.

• Beim Betrieb des Fahrzeugs, also bei drehendem Antrieb der Radeinheit, kann das Fahrzeug zur Verringerung der Geschwindigkeit abgebremst werden. Hierzu werden die Bremsmittel 12 in Richtung Bremsfläche 10 der Reibschicht 8 der Bremsscheibe 2 bewegt und erzeugen hierdurch einen Kraftschluss. Solchenfalls können Partikel in Form eines magnetischen Bremsabriebs 20 aus der Reibschicht 8 oder aus dem Bremsmittel 12 gelöst werden. Dieser magnetischer Bremsabrieb 20 wird durch die Magnetmittel 18 angezogen und gebunden.

The mode of operation of the brake disc 2 is described in more detail below:

• When the vehicle is operating, i.e. when the wheel unit is rotating, the vehicle can be braked to reduce the speed. For this purpose, the braking means 12 are moved in the direction of the braking surface 10 of the friction layer 8 of the brake disc 2 and thereby generate a frictional connection. In such a case, particles in the form of magnetic brake abrasion 20 can be released from the friction layer 8 or from the braking agent 12. This magnetic brake abrasion 20 is attracted and bound by the magnetic means 18.

The features of the invention disclosed in the above description, in the claims and in the drawing can be essential both individually and in any combination in the implementation of the invention in its various embodiments.

Reference symbol list

2

Brake disc

4

Axis of rotation

6

Basic body

8th

friction layer

10

braking surface

12

braking agent

14

Head element

16

Magnet unit

18

Magnetic means

20

Brake wear

22

surface

24

Recording section

Claims (14)

Brake disc (2) for a vehicle, which can be rotated about an axis of rotation (4), with a base body (6), with at least one friction layer (8) which is subject to wear and which is fixed to the base body (6) and which is on the base body ( 6) has a braking surface (10) on the side facing away from it, on which a braking means (12) comes into contact and causes wear when the vehicle is braked, with a head element (14) which is on the side of the base body (6) facing the axis of rotation (4). is fixed to the base body (6) and through which the brake disc (2) can be fixed in a rotationally fixed manner on a wheel hub of the vehicle and with at least one magnet unit (16), which comprises at least one magnetic means (18), through which magnetic or magnetizable brake abrasion (20) , in particular by the friction layer (8) and/or by the braking means (12), can be magnetically attracted, wherein at least one of the at least one magnetic means (18) is fixed to the head element (14) and/or wherein at least one of the at least one magnetic means (18 ) is fixed on the base body (6). Brake disc (2). Claim 1 , characterized in that at least one of the at least one magnetic means (18) of the magnet unit (16) comprises a magnetic body comprising a three-dimensional shape, a substantially flat magnetic film or a substantially flat magnetic tape. Brake disc (2). Claim 1 or 2 , characterized in that at least one of the at least one magnetic means (18) of the magnet unit (16) comprises a neodymium magnet or a hard ferrite magnet. Brake disc (2) according to one of the preceding claims, characterized in that at least one of the at least one magnetic means (18) is detachable, in particular by means of screwing, or non-detachable, in particular by means of gluing, riveting, soldering or welding, on the head element (14) or on the base body (6) is fixed. Brake disc (2) according to one of the preceding claims, characterized in that at least one of the at least one magnetic means (18) on the surface (22) facing away from the head element (14) or the base body (6) has at least one in the direction of the head element (14 ), or base body (6) includes a recessed recess. Brake disc (2) according to one of the preceding claims, characterized in that the head element (14) and/or the base body (6) has a receiving section (24) on or in which at least one of the at least one magnetic means (18) of the magnetic unit ( 16) is fixed at a contact-free distance from the wear-generating braking means (12). Brake disc (2). Claim 6 , characterized in that the receiving section (24) comprises at least one recess in the base body (6) and / or in the head element (14), which is designed to be free of material, in particular that the recess is completely or partially along a circumferential direction with respect to the axis of rotation (4). extends circumferentially. Brake disc (2) according to one of the preceding claims, characterized in that the head section comprises a surface (22) which runs obliquely or transversely with respect to the braking surface (10), which in particular comprises the receiving section (24). Brake disc (2) according to one of the preceding claims, characterized by at least one cage-like holding means which rests on the magnetic means (18) on the side of a magnetic means (18) facing away from the base body (6) or head element (14) and/or the magnetic means ( 18) is arranged overlapping and can be fixed or fixed to the head element (14) or to the base body (6) in a detachable or non-detachable manner brake disc (2). Claim 9 , characterized in that the cage-like holding means comprises a U-profile that is open on one side, with which the holding means encloses at least one of the at least one magnetic means (18) on three sides. Brake disc (2). Claim 9 or 10 , characterized in that the cage-like holding means comprises a magnetic or magnetizable material or that the cage-like holding means is formed from a non-magnetic or magnetizable material. Brake disc (2) according to one of the preceding claims, characterized in that the magnet unit (16) comprises a plurality of magnetic means (18) which are arranged evenly distributed on the circumference of the head element (14) or on the base body (6) with respect to the axis of rotation (4). are. Brake disc (2) according to one of the preceding claims, characterized by at least one coating which is applied at least on the side of the at least one magnetic means (18) facing away from the head element (14). Brake disc (2) according to one of the preceding claims, characterized in that the head element (14) and the base body (6) comprise two separate or separable components or that the head element (14) and the base body (6) form a common one-piece component .

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