Brake module for a drive system, drive system and manufacturing process for a brake module

Abstract

Brake module (1) for a drive system comprising at least one thrust washer (6) and at least one brake disc (5), a) wherein the at least one thrust disc (6) and the at least one brake disc (5) each have at least one friction surface which rubs against each other during braking operation, b) wherein at least one of the friction surfaces of the brake disc (5) is formed by a friction layer (20) to protect the brake disc (5) and / or thrust washer (6) from wear, c) wherein the brake disc (5) comprises a carrier (18) and at least one friction layer (20) connected to the carrier (18), and d) wherein the friction layer (20) comprises a carbon fiber fabric, characterized in that e) the thrust washer (6) is made of non-nitrided chromium steel.

Description

[0001] The invention relates to a brake module for a drive system, particularly for doors, comprising at least one thrust washer and at least one brake disc, wherein the at least one thrust washer and the at least one brake disc each have at least one friction surface that rubs against each other during braking. The invention further relates to a drive system, particularly for doors, comprising such a brake module. The invention also relates to a manufacturing method for a brake module of the type mentioned above.

[0002] From EP 1 664 470 B1, a drive system for adjustment devices in motor vehicles is known. The drive system comprises a housing in which a drive element of the adjustment device, a disc rotor motor with an armature disk, and a planetary gear set are arranged. The planetary gear set has a housing-mounted ring gear with internal teeth, an output ring gear with internal teeth connected to the drive element of the adjustment device, and a radially flexible ring whose external teeth partially mesh with the internal teeth of the housing-mounted ring gear and the output ring gear, and whose inner surface rolls on rollers. The output ring gear can be connected to a coil spring brake, which increases the self-locking of the drive system and, for example, in the case of a window regulator, prevents unauthorized access to the vehicle interior by pushing down the window pane.

[0003] US 2013 / 0169087 A1 discloses a drive system for setting a movable panel of a vehicle in motion. In one embodiment, the drive system comprises a mechanical brake module having a tubular brake shaft and a coil spring arranged coaxially therein. DE 102015119457 A1 describes a spindle drive for a flap of a motor vehicle.

[0004] In the prior art, such drive systems are used in particular for the electromechanical opening and closing of doors, such as vehicle doors. The drive system can assist with manual opening, holding open, and closing of the door, and / or open and close the door independently. The power of an electric motor, for example in a linear actuator, is transmitted to the door via a threaded spindle.

[0005] The brake module has several functions. Firstly, it allows, for example, a relatively heavy vehicle tailgate to be held in any desired angle, and secondly, it ensures smoother movement of the drive system. Furthermore, damage to the tailgate during closing, caused by excessive acceleration forces (particularly from the user's hand force and the weight of the tailgate), can be prevented by the opposing braking force or the resulting torque.

[0006] The magnitude of the braking force can be determined in particular by the choice of material and / or number of friction partners, their geometry and, if necessary, by the choice of the spring force of a spring that presses the thrust washer(s) against a brake disc.

[0007] Typically, the brake disc and the thrust washer(s) rotate relative to each other during braking. Common materials for the friction surfaces are sintered steel for the brake disc and nitrided chromium steel for the thrust washer. US 2015 / 0140256A1 discloses a brake disc made of a carbon-ceramic composite material. US 4828089A describes a brake with a friction material made of pyrolytic carbon. DE 10306587A1 discloses a multi-disc wet clutch with a clutch disc made of a carbon-carbon composite material. DE 102009027671A1 describes a friction lining with a modulus of elasticity that changes in the thickness direction.

[0008] The problem with brake modules of this type is that the braking force is not constant over the lifespan of the brake modules and is also temperature-dependent.

[0009] The object of the invention is therefore to provide a cost-effective brake module for a drive system and a simple manufacturing process for it, which provides a predictable braking force for the drive system and increases the service life of the drive system.

[0010] The subject matter of the present invention provides a brake module for a drive system that solves this problem according to the invention, as defined in claim 1. The problem is also solved by a drive system according to the features of claim 8 and a method according to the features of claim 9. Advantageous embodiments are described in the dependent claims.

[0011] A brake module according to the invention for a drive system, in particular for doors, comprises at least one thrust disc and at least one brake disc, wherein the at least one thrust disc and the at least one brake disc each have at least one friction surface that rubs against each other during braking operation.

[0012] For the purposes of this invention, the term "door" refers to a component for at least partially closing an opening in a building, device, or vehicle. In particular, the "door" can be a vehicle door, for example, a passenger access door, a hood, a trunk lid, a cargo door, or a tailgate. A "vehicle" within the meaning of this invention can be, for example, a land vehicle, a watercraft, or an aircraft, especially an automobile. The brake module according to the invention is particularly suitable for a drive module for vehicle doors because a constant and predictable braking force is especially important there, for example, for reasons of operational safety. Furthermore, drive systems for vehicle doors are often installed in such a way that they are difficult to replace, making a long service life particularly important.

[0013] At least one of the friction surfaces of the brake disc is formed by a friction layer to protect the brake disc and / or thrust washer from wear, whereby at least the friction layer may include fibers and / or carbon. This allows for a more constant braking force over the service life of the brake module, a lower temperature dependence of the braking force, and a longer service life of the brake module. Therefore, the braking force can also be better adapted to the specific application, and significantly less tolerance compensation is required. In the case of use for a vehicle's tailgate, for example, this allows for lower braking force at medium brake system temperatures (approx. 20 °C) and thus easier operation from any starting position to any other end position of the door, i.e., in particular, opening or closing the tailgate.The end position can be any intermediate position between a fully open position and a fully closed position. At the same time, functionality is not impaired at higher temperatures or at the start of the drive system's operation. In particular, the drive system becomes more reliable and smoother over its service life and with changing operating parameters (such as the temperature of the brake module), because the safety tolerance between the minimum braking force required to hold the door in any intermediate position and the manual force required to change its position can be smaller.

[0014] The more consistent and predictable braking force compared to a sintered brake disc can be partly explained by the more uniform surface of a brake disc according to the invention. Sintered brake discs have rounded edges due to the sintering process, resulting in a reduced effective friction surface. In contrast, a brake disc with a friction layer according to the invention for protecting the brake disc from wear has a flatter friction surface from the outset, and the effective friction surface does not change during the operation of the brake module.

[0015] Further embodiments are described by way of example using friction layers that form the friction surfaces of the brake disc. According to the invention, these embodiments can additionally or alternatively also be applied to friction layers that form the friction surfaces of the thrust washer.

[0016] Preferably, at least one, and in particular each, friction surface of the brake disc is formed by a friction layer according to the invention. This makes the aforementioned effects of the friction layers particularly pronounced.

[0017] The friction layer can consist of the entire brake disc or only a part of it, such as one or more layers of the brake disc. A friction layer of the brake disc can therefore, for example, form one or more surface layers (e.g., friction layers) of the brake disc or the entire brake disc.

[0018] The friction layer comprises carbon fibers, specifically a carbon fiber fabric. Carbon fibers, particularly in a carbon fiber fabric, can withstand very high mechanical loads at low weight, especially when a large number of fibers are bundled together to form a filament yarn. This results in high reliability of the brake module while maintaining a low weight.

[0019] The friction layer can comprise a fiber-reinforced, preferably glass fiber-reinforced and / or carbon fiber-reinforced, plastic. In the form of a fiber-reinforced plastic, the superior mechanical properties of the fibers can be advantageously combined with the ease of processing a plastic, resulting in a reliable, lightweight, and cost-effective brake module.

[0020] The friction layer can comprise an amorphous carbon layer, preferably containing metals and / or hydrogen. Amorphous carbon layers are characterized by high wear resistance. Doping hydrogen-containing amorphous carbon layers (aC:H) with metals forms a composite of an aC:H matrix and metal carbides. Layers made of this material possess high wear resistance, low coefficients of friction, and improved adhesion. By varying the metal content, the material properties can be significantly influenced and thus adapted to the requirements of the drive system.

[0021] The brake module can include a spring that presses the brake disc against the at least one thrust washer by means of a spring force. The spring is preferably a wave spring, which achieves a uniform spring force and stabilizes the brake module. The spring can be arranged on one side of a thrust washer opposite the brake disc and presses the thrust washer against the brake disc.

[0022] The brake module can comprise a thrust washer on each of two opposite sides of the brake disc, the brake disc having a friction surface facing each thrust washer, each surface having a friction layer according to the invention. By using two thrust washers on both sides of the brake disc, a longer service life and higher braking force can be achieved without significantly increasing the dimensions of the brake module.

[0023] The brake disc comprises a carrier, preferably made of plastic for reasons of weight, cost, and stability, and at least one friction layer bonded to the carrier, preferably two friction layers bonded to the carrier on opposite sides. Thus, the brake disc comprises multiple layers, resulting in improved overall brake disc properties. For example, the carrier can be less or more elastic than a brake disc consisting entirely of a single friction layer (depending on the requirements of the application specifications and the drive system in which the brake disc is used). Furthermore, the thermal expansion behavior of the brake disc can be better matched to the thermal expansion behavior of the thrust washer(s) when using two or more different materials, thereby reducing the temperature dependence of the braking torque.Furthermore, the carrier can be made of a cost-effective material, such as plastic, which reduces the overall cost of the brake disc.

[0024] At least one friction layer can be bonded to the substrate, preferably with an adhesive, preferably a partially elastic one. A bonded connection, for example through an adhesive or by coating the substrate with an amorphous carbon layer, ensures a particularly long-term stable and reliable bond between the friction layer and the substrate. The partially elastic adhesive can, for example, compensate for differing coefficients of thermal expansion between the friction layer(s) and the substrate. Furthermore, the partially elastic adhesive allows for improved vibration damping.

[0025] The at least one thrust washer is made of steel, specifically non-nitrided chromium steel. It has been found that while a thrust washer made of non-nitrided chromium steel has a shorter service life than one made of nitrided chromium steel, it significantly reduces vibration and noise generation when rubbing against a brake disc made of fiber-reinforced plastic. A brake module according to the invention with thrust washer(s) made of non-nitrided chromium steel nevertheless exhibits a comparable or even longer service life than a prior art brake module.

[0026] The brake disc can be annular and, in particular, have a central recess, the central recess preferably being approximately circular, especially with at least two toothed sections separated from each other by a number of, for example, one, two, three, four, five, six, or seven, recesses, wherein the toothed sections preferably comprise radially inwardly projecting teeth. Such a design allows for a more flexible connection of the brake disc, for example, to a drive shaft, in particular a threaded spindle, of the drive system. This makes tilting of the brake disc and the spindle nut unlikely. It is therefore also easier to install the brake module late in the production process of a drive system and to avoid vibration damage during assembly, or to remove it if the brake module is defective.An approximately circular cross-section of the recess can, for example, mean that the cross-section is circular except for the radially inwardly projecting tooth sections. The recesses are advantageously distributed evenly around the circumference of the brake disc, i.e., with a constant angular distance between them, to ensure even loading of the brake disc and thus a long service life.

[0027] The brake disc and / or thrust washer can have a number of recesses in a friction surface for holding a lubricant. These recesses can serve as a reservoir for a lubricant specifically formulated for the friction partners, such as chrome steel and a carbon-based friction layer, thereby increasing the service life of the brake module without requiring large quantities of lubricant.

[0028] The brake module can comprise a housing in which the brake disc and the at least one thrust washer are guided, preferably coaxially about a central axis, in particular the longitudinal axis of a drive shaft, especially a threaded spindle, of the drive system. The brake module preferably includes a cover plate which is connected to the housing, preferably by a snap-fit ​​connection, such that the brake disc and the at least one thrust washer are held in the housing. The cover plate can, for example, have snap-fit ​​recesses into which snap-fit ​​hooks of the housing can engage. Advantageously, the snap-fit ​​connection can be designed such that the cover plate cannot be separated from the housing without damage. This protects components arranged in the housing from tampering.

[0029] Preferably, the brake module is constructed along its longitudinal axis as follows: spring, thrust washer, brake disc, thrust washer, cover plate. Preferably, all these components are at least partially enclosed by the housing. This allows for easy installation of the brake module in the drive system without the risk of losing any part of the brake module.

[0030] The housing can include a number of slots, for example one, two, three, four, five, six, or seven, the longitudinal axis of which is advantageously aligned parallel to the longitudinal axis of the drive shaft. Furthermore, at least one thrust washer can have thrust washer projections extending radially outward from the longitudinal axis, which are shaped complementarily to the housing slots, so that the housing slots and the thrust washer projections interact in a positive-locking manner to prevent rotation of the thrust washer relative to the housing about the longitudinal axis. This prevents the thrust washer from rotating with the brake disc during braking, which could reduce or even eliminate the braking effect. By aligning the longitudinal axis of the slots parallel to the longitudinal axis of the drive shaft, the thrust washer can be easily inserted into the housing along its longitudinal axis during brake module assembly.Advantageously, the housing slots are evenly distributed around the longitudinal axis of the housing, i.e., with a constant angular distance between them. This distributes the load evenly across the housing, which increases its service life.

[0031] The problem according to the invention is also solved by a drive system, in particular for a door, comprising a brake module according to one of the preceding embodiments.

[0032] The object of the invention is also achieved by a manufacturing method for a brake module according to the invention, the brake module comprising at least one thrust disc and at least one brake disc, wherein the at least one thrust disc and the at least one brake disc each have at least one friction surface which rubs against each other during braking operation, wherein the method comprises the following steps: a. Providing a support, in particular a disc-shaped one, b. Providing at least one, preferably disc-shaped, thrust washer blank made of non-nitrided chromium steel, and c. Coating the carrier on at least one side with a friction layer comprising a carbon fiber fabric for wear protection in order to form the brake disc.

[0033] The material of at least one friction layer of the brake disc thus comprises a carbon fiber fabric, resulting in a more constant braking force over time, reduced temperature dependence of the braking force, and a longer service life for the brake module. This allows the braking force to be better adapted to the specific application, and significantly less tolerance compensation is required. The substrate can, for example, be more or less elastic than a brake disc and / or thrust washer consisting entirely of the friction layer. Furthermore, when using several, especially two, different materials, the thermal expansion behavior of the brake disc can be better matched to the thermal expansion behavior of the thrust washer(s), thereby reducing the temperature dependence of the braking force.Furthermore, the carrier can be made of a cost-effective plastic, which reduces the overall cost of the brake disc and / or thrust washer.

[0034] Preferably, the carrier is coated with a friction layer on two opposite sides to form the brake disc.

[0035] The step of coating the substrate can include applying an adhesive layer, preferably a partially elastic one, to at least one side of the substrate, after which the friction layer is applied to the adhesive layer. The adhesive layer can, for example, compensate for differing coefficients of thermal expansion between the friction layer(s) and the substrate. Furthermore, the adhesive layer allows for improved vibration damping.

[0036] The adhesive can be cured isobarically and variothermally. This results in a permanent bond between the substrate and the friction layer.

[0037] The manufacturing process may also include the following step: Polishing the thrust washer blank, preferably by ball polishing, to shape the thrust washer.

[0038] It has been found that polishing, and especially ball polishing, produces a particularly uniform friction surface with fewer direction-dependent artifacts. This also reduces the effect of the thrust washer "flattening" during operation, which can lead to significant variations in braking force initially, for example, during the first few hundred braking cycles. Furthermore, a uniform friction surface results in less vibration during braking and therefore lower noise levels.

[0039] The at least one thrust washer blank can be deburred, especially in addition to polishing, for example before polishing. This allows for an even more uniform friction surface of the thrust washer.

[0040] Further advantages, objectives, and features of the present invention are explained with reference to the following description and accompanying drawings, which illustrate exemplary brake modules and manufacturing processes according to the invention. Components of the devices that are at least substantially identical in their function in the figures may be identified by the same reference numerals, although these components need not be numbered and described in all figures.

[0041] They show: Fig. 1 a brake module according to the invention in external view; Fig. 2 the brake module of the Fig. 1 in section view; Fig. 3 the brake module of the Fig. 1 and Fig. 2 in exploded view; Fig. 4 a part of the brake module of the Fig. 1, Fig. 2 and Fig. 3 in another exploded view; Fig. 5 a brake disc according to the invention and a spindle nut. Fig. 6. A qualitative representation of the dependence of the braking torque of a prior art brake module on the number of braking cycles and the temperature; Fig. 7 a qualitative representation of the dependence of the braking torque of a brake module according to the invention on the number of braking cycles and the temperature; Fig. 8 a schematic diagram of a manufacturing process according to the invention.

[0042] Fig. Figure 1 shows an external view of a brake module 1 according to the invention. The brake module 1 is connected here to a spindle 2 of a drive system. The brake module 1 comprises a cylindrical outer housing 3.

[0043] Fig. Figure 2 shows brake module 1 of the Fig. Figure 1 shows a sectional view. The drive system comprises a spindle nut 4 connected to the spindle 2. During braking, the spindle nut 4 engages a brake disc 5 of the brake module 1, which is arranged radially outside the spindle nut 4 and to the longitudinal axis of the spindle. The brake disc 5 comprises at least two friction surfaces which, during braking, rub against adjacent friction surfaces of two thrust washers 6 due to the relative rotation of the brake disc 5 about the thrust washers 6 around the longitudinal axis. This exerts a braking torque on the spindle 2 of the drive system. A spring 7 exerts a spring force along the longitudinal axis on one of the thrust washers 6, pressing the brake disc 5 and the thrust washers 6 together to maintain frictional contact. The strength of the spring force is a parameter that determines the magnitude of the braking force. In this embodiment, the spring 7 is a wave spring.

[0044] Fig. Figure 3 shows brake module 1 of the Fig. 1 and Fig. 2 in exploded view. The brake disc 5, the thrust washers 6 and the spring 7 are all arranged here in a housing 8, the construction of which is explained below.

[0045] Fig. Figure 4 shows part of brake module 1 of the Fig. 1, Fig. 2 and Fig. Figure 3 shows a further exploded view. In addition to the housing 8, the brake module 1 comprises a cover plate 9. Within the housing 8, the brake disc 5, the two thrust washers 6, and the spring 7 are guided coaxially around the longitudinal axis of the spindle (not shown here). The housing 8 is connected to the cover plate 9 by a snap-fit ​​connection, which holds the brake disc 5, the two thrust washers 6, and the spring 7 within the housing 8. The cover plate 9 has detent recesses 10 into which detent hooks 11 of the housing 8 can engage. The structure of the brake module along the longitudinal axis is thus: spring 7, thrust washer 6, brake disc 5, thrust washer 6, cover plate 9. These components are all at least partially enclosed by the housing 8 when assembled. This allows for easy installation of the brake module 1 in the drive system without the risk of losing any part of the brake module 1.

[0046] The housing 8 further comprises a number of housing slots 12, for example five, evenly distributed around the longitudinal axis of the spindle nut 2 in the circumferential direction of the housing, with a slot longitudinal axis parallel to the longitudinal axis. Thrust washer projections 13 of the thrust washers 6 engage in the housing slots 12, extending radially outwards from the longitudinal axis. This prevents relative rotation of the housing 8 and the thrust washers 6 relative to each other around the longitudinal axis when the brake disc 5 rotates with the spindle 2 and rubs against the thrust washers 6 during braking operation.

[0047] The brake disc 5 is ring-shaped and has a central recess. The central recess has an approximately circular cross-section with at least two, for example four, toothed sections 14 evenly distributed around the longitudinal axis of the brake disc 5, which are separated from each other by cutouts 15. This is illustrated by the following Fig. 5 explained in more detail.

[0048] Fig. Figure 5 shows a brake disc 5 and a spindle nut 4 according to the invention in plan view. The tooth sections 14 comprise radially inwardly projecting teeth 16. This design allows for a flexible connection of the brake disc 5 to the spindle nut 4 of the drive system. The spindle nut 4 comprises spindle nut wings 17 that engage in the recesses 15, and the transmission of torque between the spindle nut 4 and the brake disc 5 occurs via the contact between the spindle nut wings 17 and the teeth 16. This makes tilting of the brake disc 5 and the spindle nut 4 less likely than with a positive-locking connection. This facilitates the installation of the brake module 1 late in the production process of a drive system, avoids vibration damage caused by a later installation time, and makes it easier to replace the brake module 1 if it is defective, since the brake module 1 can be more easily placed onto the spindle nut 2.

[0049] Fig. Figure 6 shows a qualitative representation of the dependence of the braking torque BM of a prior art brake module on the number of braking cycles BZ and the temperature. The braking cycles are shown logarithmically, and the development of the braking force is plotted for three temperatures covering all relevant operating temperatures. Such a brake module uses, for example, thrust washers made of nitrided chrome and a brake disc made of sintered steel. As can be seen, the braking force of the brake module decreases in the first few hundred braking cycles and then gradually increases again. Furthermore, it is evident that the braking force varies considerably with temperature, which is illustrated by the double arrow indicating the tolerance range TB of the brake system.

[0050] Fig. Figure 7 shows a qualitative representation of the dependence of the braking torque BM of a brake module 1 according to the invention on the number of braking cycles BZ and the temperature. The braking cycles are again shown logarithmically, and the development of the braking force is plotted for three temperatures, covering all relevant operating temperatures. As can be seen, the braking force varies only slightly depending on the number of braking cycles completed. Furthermore, it can be seen that the braking force varies significantly less with temperature, which is illustrated by the double arrow indicating the tolerance range TB of the braking system. Thus, the braking force is much more precisely defined and does not have to be selected, as in the prior art, in such a way that it is significantly too high for a large part of the service life and temperature range. This reduces the wear of the brake disc and the thrust washers on average, which partly explains the increased service life of the braking system.A drive system with such a brake module is also more comfortable to handle, more energy-efficient and more durable due to the lower braking force in most operating situations.

[0051] Fig. Figure 8 shows a schematic diagram of a manufacturing process according to the invention. The manufacturing process according to the invention comprises the following steps: a. Providing a support, for example a disc-shaped one, 18, for example made of plastic, optional: a1. Coating the carrier 18 on at least one side (here on two sides) with an adhesive layer 19, c. Coating the carrier 18 (or optionally the adhesive layer 19) on at least one side (here on two sides) with a friction layer 20 comprising a carbon fiber fabric to form the brake disc 5.

[0052] The carrier 18 can, for example, be less elastic or more elastic than a brake disc 5 consisting entirely of the friction layer 20. Furthermore, the carrier 18 can be made of a cost-effective plastic.

[0053] The step of coating the carrier 18 can include applying an adhesive layer 19, preferably partially elastic, to at least one side of the carrier 18, after which the friction layer 20 is applied to the adhesive layer 19. REFERENCE MARK LIST 1 brake module 2 spindles 3 outer casings 4 spindle nuts 5 brake disc 6 Thrust washer 7 spring 8 cases 9 Cover plate 10 rest recesses 11 locking hooks 12 case slots 13 Thrust washer projection 14th tooth section 15 recess 16 teeth 17 spindle nut wings 18 carriers 19 Adhesive layer 20 friction layer BM brake torque BZ Number of braking cycles TB Tolerance Range

Claims

[1] Brake module (1) for a drive system comprising at least one thrust washer (6) and at least one brake disc (5), a) wherein the at least one thrust disc (6) and the at least one brake disc (5) each have at least one friction surface which rubs against each other during braking operation, b) wherein at least one of the friction surfaces of the brake disc (5) is formed by a friction layer (20) to protect the brake disc (5) and / or thrust washer (6) from wear, c) wherein the brake disc (5) comprises a carrier (18) and at least one friction layer (20) connected to the carrier (18), and d) wherein the friction layer (20) comprises a carbon fiber fabric, characterized by , that e) the thrust washer (6) is made of non-nitrided chromium steel. [2] Brake module (1) according to claim 1, characterized by, that the brake module (1) comprises a thrust disc (6) on each of two opposite sides of the brake disc (5), wherein the brake disc (5) comprises a friction surface facing each of the thrust discs (6) with a friction layer (20). [3] Brake module (1) according to one of claims 1 to 2, characterized by , that the brake disc (5) comprises two friction layers (20) connected to the carrier (18) on opposite sides of the carrier (18). [4] Brake module (1) according to one of claims 1 to 3, characterized by , that the at least one friction layer (20) is bonded to the carrier (18) by means of an adhesive layer (19). [5] Brake module (1) according to any one of claims 1 to 4, characterized by , that the brake disc (5) is annular and has a central recess, wherein the central recess has an approximately circular cross-section with at least two tooth sections (14) separated by recesses (15). [6] Brake module (1) according to any one of claims 1 to 5, characterized by , that the brake disc (5) and / or the thrust disc (6) has a number of recesses in a friction surface for receiving a lubricant. [7] Brake module (1) according to any one of claims 1 to 6, characterized by , that the brake module (1) comprises a housing (8) in which the brake disc (5) and the at least one thrust washer (6) are guided, wherein the brake module (1) comprises a cover disc (9) which is connected to the housing (9) by a snap-fit ​​connection such that the brake disc (5) and the at least one thrust washer (6) are held in the housing (8). [8] Drive system comprising a brake module (1) according to any one of the preceding claims. [9] Manufacturing method for a brake module (1) according to any one of claims 1 to 7 comprising at least one thrust washer (6) and at least one brake disc (5), wherein the at least one thrust washer (6) and the at least one brake disc (5) each have at least one friction surface which rub against each other during braking operation, characterized by the following steps: a. Providing a carrier (18), b. Providing at least one thrust washer blank for the thrust washer (6) made of non-nitrided chromium steel, and c. Coating the carrier (18) on at least one side with a friction layer (20) comprising a carbon fiber fabric for wear protection in order to form the brake disc (5). [10] Manufacturing process according to claim 9, characterized by, that the step of coating the carrier (18) includes applying an adhesive layer (19) to at least one side of the carrier (18), after which the friction layer (20) is applied to the adhesive layer (19). [11] Manufacturing process according to any one of claims 9 to 10, characterized by the following step: Polishing and / or deburring the thrust washer blank to form the thrust washer (6).

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