Clamping device for motor vehicle

Abstract

The invention relates to a clamping device (7) for a braking system (1) intended to exert a relative movement between friction elements (2a, 2b) and comprising a frame (8) supporting an electric actuator (12) intended to provide the clamping force and an electronic control device (19) connected to a power supply line to control the electric actuator (12) in order to carry out the clamping, in which the electronic control device (19) comprises a printed circuit (20) comprising at least two support parts (22, 24) carrying electronic components and a connecting part (23) connecting the two support parts (22, 24) to ensure the transmission of electrical energy, the connecting part (23) forming an articulation allowing the two support parts (22, 24) to be arranged in a non-coplanar manner. Figure for the abstract: figure 4

Description

Title of the invention: Clamping device for a motor vehicle Technical field of the invention

[0001] The invention relates to the field of clamping devices for motor vehicle braking systems, more particularly electromechanical type braking systems. Technical background

[0002] A braking system of a vehicle, in particular a motor vehicle, generally comprises clamping devices comprising friction elements and an actuating member, also called an actuator, capable of moving the friction means towards a braking member fixed to a wheel of the vehicle. The purpose of the actuator is to place the friction means, for example linings of a drum brake or pads of a disc brake, in contact with the braking member to brake the vehicle by friction and to move them away from the braking member in order to stop braking. When the braking system is a disc brake, the braking member is formed by a disc rotationally fixed to the wheel. In the case of a drum brake, the braking member is formed by a drum rotationally fixed to the wheel.

[0003] For many years, the actuator was hydraulic. It is now electric, particularly with the advent of electric motor vehicles. The actuator consists of an electric motor that is configured to be controlled by an electronic control device. The electronic control device is configured to send a power, amplitude and force command to the motor allowing it to actuate the clamping device in order to perform effective clamping.

[0004] Since electric vehicles are often heavy, high braking power is often required. In a braking system, the braking power depends not only on the electrical power provided by a battery supplying the actuator, but also on the size of the actuator, which turns out to be bulky.

[0005] The electronic control device is generally integrated into an electronic control unit (or "ECU" from the English term "Electric Control Unit") of the vehicle, which may require long, bulky transmission cables running through the entire vehicle to the clamping device of each wheel. Furthermore, it is also known to attach the electronic control device to a frame of the actuator. However, such an arrangement often requires a dimensional increase of the frame to accommodate the electronic control device, or requires additional elements attached to the frame, which have tend to be bulky and therefore reduce the space that could be useful for a larger actuator.

[0006] To this end, the invention relates to a braking device for a braking system intended to exert a relative movement between friction elements and comprising a frame supporting an electric actuator intended to provide the clamping force and an electronic control device connected to a power supply line to control the electric actuator in order to carry out the clamping, in which:

[0007] - the electronic control device comprises a printed circuit comprising at at least two support parts carrying electronic components and a connecting part connecting the two support parts to ensure the transmission of electrical energy, and

[0008] - the connecting part forms an articulation allowing the two parts to be arranged support in a non-coplanar manner.

[0009] It is understood that the printed circuit (or "PCB" coming from the English terms "Printed Circuit Board") is a support formed by a multilayer assembly, the printed circuit is intended to carry electronic components electrically connected to each other, for example sensors, capacitors, transistors, microcontroller among others. Furthermore, the electronic control device is connected to a power supply line, for example connecting a battery of the vehicle to the electric actuator, for the management of the power or the voltage supplied to the actuator to carry out the tightening.

[0010] Here, the printed circuit, or support, is advantageously broken down into at least two support parts carrying electronic components which are connected to each other by a connecting part which ensures the electrical connection between the two support parts, more particularly throughout the circuit. This connecting part forms an articulation which makes it possible to vary the relative positions of the two support parts carrying electronic components on one face or two of their main faces. The articulation therefore makes it possible to arrange the support parts according to different geometries in space so as to be adaptable according to the space available for mounting the printed circuit or according to the desired location of the connectors of the electronic control device.

[0011] Advantageously according to the invention, the two support parts can thus be arranged in a non-coplanar manner so as to increase the compactness of the printed circuit. Indeed, unlike a conventional printed circuit, the printed circuit according to the invention is broken down into at least two support parts without compromising all the electronics of the printed circuit, and their non-coplanarity makes it possible to reduce the area or space occupied without having to reduce the number of electronic components of this printed circuit. Thus, all the electronics are kept in a same printed circuit board that is geometrically modular and is suitable for occupying a smaller space compared to a conventional printed circuit board with a single rigid plate. Alternatively, for the same space, it is possible to carry more electronic components.

[0012] It is also immediately apparent that the same generic type of clamping device, advantageously according to the invention, can be used without differentiation between front and back or between right and left, only the implantation of the same generic printed circuit being modified during manufacture, which brings a significant reduction in manufacturing costs.

[0013] The braking device may further comprise one or more of the following optional features, taken alone or in combination:

[0014] - With respect to the connecting part, each support part comprises at least one rigidifying layer for supporting the electronic components.

[0015] The multi-layer assembly of each support part comprises a stiffening layer. Preferably this stiffening layer is based on a polymer, and is deposited on the external faces of the multi-layer assembly. This polymer layer, sometimes called a solder mask or resist varnish, is applied to protect the support parts from oxidation and to prevent the formation of solder bridges. The polymer layer is for example green in color, but it can be black, blue, or red, etc. This polymer layer gives a certain rigidity to the two non-coplanar parts.

[0016] Here, only the support parts comprise such a stiffening layer so that the connecting part has a certain flexibility relative to the support parts.

[0017] By "flexible" or "flexibility" is meant that the connecting part is capable of changing shape by folding or unfolding or being subjected to twisting without breaking while maintaining the transmission of electrical energy. In other words, the change in shape of the connecting part is reversible.

[0018] The support parts are therefore relatively rigid compared to the connecting part in order to be able to mechanically support electronic components and withstand the thermal variations imposed by the latter.

[0019] Thanks to this difference in flexibility, the connecting part easily allows the relative position between the support parts to be varied and therefore allows the support parts to be arranged according to different geometries in space while respecting their non-coplanarity. Thus, the arrangement of the proposed printed circuit is adaptable according to the space available for its assembly.

[0020] - The connecting part is preferably formed from a multi-layer assembly of which at at least one outer layer has a plastic sheet.

[0021] The outer plastic sheet layer of the connecting part, often called the cover layer (for anglicism “overlay”), gives a certain flexibility to this connecting part in relation to the support parts.

[0022] The support parts are preferably each devoid of such a plastic sheet so as to have reduced flexibility, or even to accentuate their rigidity compared to the connecting part, this rigidity being conferred in particular by their stiffening layer. Indeed, the stiffening layer concerns the external layer of the multilayer assembly of each of the support parts. It is thus understood that each support part comprises an external stiffening layer while the connecting part comprises an external layer of plastic sheet. In other words, each support part is devoid of plastic sheet and the connecting part is devoid of stiffening layer.

[0023] By "devoid" is meant that no plastic sheet - respectively no stiffening layer - is present in the multilayer assembly of the so-called rigid support parts - respectively of the connecting part - or that the plastic sheet partially overlaps the edge of these support parts, in particular during the manufacture of the printed circuit, for example by lamination, by an interval of between 0.60 mm (millimeter) and 3.20 mm, preferably from 1 mm to 1.3 mm.

[0024] Thanks to this difference in flexibility, the connecting part allows the rigid support parts to be arranged according to different geometries in space while respecting their non-coplanarity. Thus, the arrangement of the proposed printed circuit is adaptable according to the space available for its assembly.

[0025] - The plastic sheet is chosen from a polyimide, polyethylene terephthalate (or “PET”), Polyethylene naphthalate (or “PEN”).

[0026] This list is of course not exhaustive and it is possible to consider other alternatives, known to those skilled in the art, depending on the needs.

[0027] - The two support parts have a number of layers greater than that of the connecting part.

[0028] This difference in the number of layers makes it possible to vary the width of the different parts of the printed circuit, which also contributes to the relative flexibility between these different parts.

[0029] - The clamping device comprises a frame, the electronic control device being mounted on the frame and covered by a protective cover.

[0030] Thus, the electronic control device, or the printed circuit is configured to be received on the frame to be arranged close to the actuator. By making the printed circuit geometrically adaptable, the clamping device can comprise more electronic components for the same space capable of offering a certain autonomy (in terms of electronic components) of braking. Indeed, in a vehicle, each wheel includes a braking system. Here, by arranging the electronic control device with more electronic components next to the clamping device, each system is able to control the clamping at its corresponding wheel. This is especially important for managing braking power between the front and rear wheels, where front braking is often more powerful than rear braking. Such autonomy also allows each system to regulate the clamping force when there is a braking imbalance between the wheels on the right and the wheels on the left.

[0031] In addition, thanks to the articulation and flexibility provided by the connecting part, the printed circuit can be mounted on the frame without requiring modification of the frame to accommodate the circuit. On the contrary, the different parts of the printed circuit adapt according to the space available on the frame. In addition, the reduced minimum surface area of ​​the printed circuit requires a less bulky protective cover for the same number of electronic components, unlike a conventional cover, the protective cover covers the electronic control device to protect it by providing a sealing function.

[0032] With such compactness, and such adaptability of the printed circuit, it is also possible to provide a larger actuator capable of providing a higher braking force to the clamping device. Thus, the braking power is increased without increasing the volume of the system.

[0033] - A first of the support parts carries electronic components of power and a second of the support parts carries electronic components of lower power compared to the first.

[0034] Each of the two support parts carries electronic components capable of producing thermal power, here one of the support parts carries electronic components producing thermal power greater than that of another non-coplanar part.

[0035] Here, thermal power is used to quantify the dissipated thermal energy or heat released by electronic components. Electronic components are all capable of releasing heat. Here, the printed circuit board layout (also known as "PCB layout" in English) is optimized by separating the power electronic components, which generate more heat, and the lower power electronic components which have a minimal impact on heat generation.

[0036] Among the power electronic components, called "hot electronic components", we find capacitors, power transistors, high-power integrated circuits, processors, power converters, among others. These components often require cooling measures to avoid overheating and ensure their proper functioning.

[0037] Lower power electronic components, referred to as "cold electronic components," refer to components that preferably have a control, regulation, and management function. These components tend to produce less heat than power electronic components and are more focused on signal manipulation, interface management, and control logic. Examples of such cold electronic components include microcontrollers, sensors, antennas, among others.

[0038] By separating the hot components from the cold components, it is ensured that the cold components are not impacted by the heat released by the hot components which could lead to a malfunction.

[0039] - The support part carrying the power electronic components is arranged proximal to the power line and the support portion carrying the lower power electronic components is arranged distal to the power line.

[0040] Preferably, the "hot electronic components" are placed at the beginning of the power supply and the "cold electronic components" at the end of the power supply because they do not require a high voltage. In addition, it will be more practical to provide a cooling system for the hot components which are grouped around the same location. Finally, the connecting part will not have to support high electrical power transfer.

[0041] - At least two support parts are arranged in parallel opposite each other. from each other. It is thus understood that the minimum main surface of the printed circuit is divided into a stack in height of the surface of each support part connected to each other by the connecting part. The overall volume is thus advantageously modified to offer a different layout of the printed circuit.

[0042] Such an arrangement also makes it possible to mount “cold electronic components” of each support part opposite each other and, for example, for “hot electronic components” of one support part not to be covered by the other support part in order to guarantee the thermal operating viability of all the electronic components of the printed circuit. In such an arrangement, it is understood that the compactness of the printed circuit is very high by guaranteeing a very reduced minimum implantation surface for a height substantially equivalent to the maximum height of the “hot electronic components” such as the capacitors, that is to say a maximum height identical to the height of the usual printed circuits.

[0043] - The printed circuit is arranged when viewed from the side in a “U” shape, preferably with the supporting parts arranged in parallel.

[0044] Such an arrangement makes it possible to form an air layer between the support parts arranged opposite each other. Since the air acts as an insulator, heat dissipation is promoted by convection between the two support parts. In such an arrangement, the compactness of the printed circuit is even higher. The circuit occupies a reduced space and the electronic components are included in a restricted space without reducing their operating capacity.

[0045] - The support parts are separated by a gap, preferably the gap is adjustable according to the height of the power electronic components, preferably capacitors.

[0046] The gap is formed between the support parts. Advantageously, the air layer is formed in the gap to promote heat dissipation. Thus, the gap between the support parts can be modified depending on the electronic components carried by these support parts, in particular for heat dissipation and also to have a compact configuration. The capacitor is an elementary electronic component that can store electrical charges to stabilize a power supply, process periodic signals, and store energy. Due to its function, the capacitor has a height greater than that of the other components. Consequently, the gap is adjustable depending on the height of the capacitors carried by the support parts.

[0047] - Each support part has dimensions: length, width, thickness similar or different.

[0048] Depending on the electronics required on the printed circuit, the length of the printed circuit can be advantageously varied.

[0049] - At least two adjacent support portions are arranged to form between them an angle substantially equal to 90°.

[0050] Thus, the support parts are arranged substantially in an “L” shape so as to have a reduced height, in particular when it is mounted on the frame. Preferably, this “L” shape makes it possible to arrange the printed circuit so as to surround the electric actuator to occupy the least possible space. The connecting part, by its flexibility, makes it possible to promote such an arrangement of the adjacent support parts.

[0051] - the printed circuit comprises at least a third support part intended for carrying electronic components and connected to one of the two first support parts using a second connecting part to ensure the transmission of electrical energy and forming a joint allowing the third support part to be arranged in a non-coplanar manner relative to said one of the two first support parts.

[0052] Such an arrangement makes it possible to provide a printed circuit advantageously composed of at least three support parts, the joints formed between these three support parts allow the relative position between each of the support parts to be varied, for example to arrange the printed circuit in a U shape, in particular with the two support parts at the ends in parallel. Here again, the arrangement allows an air layer to be formed between the support parts arranged opposite each other to promote convection between the two support parts. Once again, the compactness of the printed circuit is even higher, the printed circuit is able to surround a part of the frame so as to occupy a reduced space and the electronic components are included in a restricted space without reducing their operating capacity.

[0053] The invention also relates to a vehicle braking system comprising a pair of friction elements intended to cooperate by friction with a disc, the system comprising at least one clamping device as described above to bring the pair of friction elements closer to two opposite faces of the disc in order to clamp it.

[0054] The invention also relates to a vehicle comprising a braking system as described above. Brief description of the figures

[0055] The invention will be better understood on reading the following description given solely by way of example and with reference to the appended drawings in which:

[0056] [Fig.l] is a schematic top view of a vehicle in which a clamping system according to the invention is mounted;

[0057] [Fig.2] is a schematic view of a braking system according to the invention;

[0058] [Fig.3] is a perspective view of a clamping device according to the invention;

[0059] [Fig.4] is a transparent view of an example of a first embodiment braking system according to the invention;

[0060] [Fig.5] is a transparent view of an example of a second embodiment of a braking system according to the invention;

[0061] [Fig.6] is a side view of an example of a printed circuit of a third embodiment according to the invention;

[0062] [Fig.7] is a top view of the example printed circuit of the third embodiment according to the invention. Detailed description

[0063] In all that follows, the orientations are the orientations of the figures. In particular, the terms "upper", "lower", "left", "right", "above", "below", "forward" and "backward" are generally understood in relation to the direction of representation of the figures. However, a further distinction is made between:

[0064] - an axial direction A, coincident with the central thrust axis of the elements 2a, 2b of friction;

[0065] - a radial direction R, perpendicular to the axial direction A, passing through a radius in the median plane of disc 3; and

[0066] - a tangential direction T, perpendicular to the axial direction A, resulting from the friction by the friction elements 2a, 2b in approach according to the axial direction A pressing against the disc 3 in rotation according to an axis parallel to the axial direction A and integral with a wheel 5 of a vehicle 4.

[0067] The invention applies to any type of braking system 1, in particular those intended to equip motor vehicles 4 of the passenger car type, SUV (“Sport Utility Vehicles”), two-wheelers (in particular motorcycles), airplanes, industrial vehicles chosen from vans, “Heavy Goods Vehicles” - i.e. metro, bus, road transport vehicles (trucks, tractors, trailers), off-road vehicles such as agricultural or civil engineering vehicles -, or other transport or handling vehicles. The invention also applies to non-motorized vehicles such as in particular a trailer, a semi-trailer or a caravan.

[0068] [Fig. 1] represents a vehicle 4 in which each wheel 5 comprises a braking system 1. The braking system 1, as illustrated in the example of FIGS. 2 and 3, comprises a clamping device 7 of the floating caliper type. The clamping device 7 comprises a frame 8, or brake, formed of a yoke 9 fixed relative to the vehicle 4 and a caliper 10 comprising friction elements 2a, 2b intended to come into contact with a disc 3 of the wheel 5 of the vehicle 4 to brake it. The clamping device 7 is intended to exert a relative movement in the axial direction A between the friction elements 2a, 2b towards the two opposite faces of the disc 3 to clamp it. In particular, for a floating type caliper 10, the yoke 9 is arranged to bring the friction element 2a of one branch of the caliper 10 closer once the friction element 2b of the other branch is brought into contact with the disc 3.

[0069] With reference to [Fig. 3], the frame 8 supports an electric actuator 12 intended to provide a clamping force to the clamping device 7 when braking is requested. The electric actuator 12 is configured to manage the amplitude and the force of bringing together the friction elements 2a, 2b to allow the relative movement of these elements 2a, 2b in a substantially axial rectilinear direction A.

[0070] Of course, the invention also applies to a braking system 1 with a clamping device 7 of the fixed caliper type, that is to say that a frame 8, formed of a caliper 10 fixed relative to the vehicle 4, comprises an electric actuator 12 for each element 2a, 2b on each side of the disc 3 to bring the friction elements 2a, 2b together respectively in order to come into contact with the disc 3.

[0071] The example illustrated in [Fig.4] presents a first embodiment of the system 1 braking system comprising an electronic control device 19 mounted on the frame 8 of the clamping device 7. The electronic control device 19 is covered by a protective cover 13 making it possible to ensure the physical protection and sealing of the device 19 but also of the electromechanical part of the clamping device 7 such as the electric actuator 12. Advantageously, the electronic control device 19 is connected to a power supply line (not shown) for managing the power (or voltage) supplied to the electric actuator 12 to carry out the clamping. Thus, the electronic control device 19 is arranged close to the electric actuator 12 so that each braking system 1 is able to control the clamping at its corresponding wheel 5, in particular autonomously. Such autonomy therefore allows each system 1 to regulate the clamping force according to the needs of the vehicle 4.

[0072] The electronic control device 19 comprises a printed circuit 20 (or “PCB” for “Printed Circuit Board” in English). The printed circuit 20 comprises two support parts 22, 24 each configured to carry electronic components 30 not visible in [Fig. 4]. These electronic components 30 have been omitted to better visualize the arrangement of the printed circuit 20 on the frame 8. Furthermore, the support parts 22, 24 are connected by a connecting part 23 making it possible to ensure the electrical connection between the two support parts 22, 24. Furthermore, the connecting part 23 forms a joint making it possible to arrange the two support parts 22, 24 in a non-coplanar manner, that is to say on different planes.

[0073] Preferably, each support portion 22, 24 comprises an external stiffening layer relative to the connecting portion 23, in particular to be able to mechanically support the electronic components 30 and withstand the thermal variations imposed by the latter. Since the connecting portion 23 is devoid of a stiffening layer, a difference in flexibility is created between the support portions 22, 24 and the connecting portion 23. This difference in flexibility allows the connecting portion to vary the relative position between the support portions 22, 24 to arrange them according to different geometries in space, and thus make the printed circuit 20 adaptable depending on the space available for its assembly.

[0074] The connecting part 23 is therefore advantageously flexible relative to the support parts 22, 24 so as to be able to vary the relative position between these support parts 22, 24 and to arrange these support parts 22, 24 according to different geometries in space while respecting non-coplanarity.

[0075] The difference in flexibility between the support parts 22, 24 and the connecting part 23 can be further accentuated by the presence of a plastic sheet layer on the connecting part 23. The plastic sheet layer can in particular be chosen from a polyimide, polyethylene terephthalate (or “PET”), Polyethylene naphthalate (or “PEN”). Thanks to this high flexibility, the connecting part 23 is therefore more able to deform to vary the geometry of the printed circuit 20 in order to adapt its layout according to the space available for its installation on the frame 8.

[0076] As visible in the example of [Fig.4], the support parts 22, 24 are arranged so as to form between them an angle substantially equal to or less than 90°. This configuration makes it possible to arrange the printed circuit 20 substantially in an “L” shape. In such a configuration, the printed circuit 20 is installed on the frame 8 so as to surround a part of the electric actuator 12, thus occupying less space and a reduced height. Thanks to the adaptability and the reduced minimum surface area of ​​the printed circuit 20, a larger electric actuator 12 can be envisaged in the braking system 1. Similarly, a smaller protective cover 13 can be envisaged due to the reduced minimum surface area of ​​the printed circuit 20.

[0077] With reference to the example of [Fig. 5] illustrating a second embodiment according to the invention, the printed circuit 20 comprises a third support part 26 relative to [Fig. 4]. This third support part 26 is connected to one of the first support parts 22, 24, here a second support part 24, using a second connecting part 25 so as to arrange the printed circuit in a “U” shape. In this configuration, the end support parts 22, 26 are arranged in parallel opposite one another so as to surround the electronic actuator 12, or even surround at least three faces of this actuator 12. Thus, for a reduced height, the printed circuit 20 can comprise more electronic components 30.

[0078] Figures 6 and 7 show an example of a third embodiment of printed circuit 20. [Fig. 6] is a side view and [Fig. 7] is a top view. In this example, the printed circuit 20 is once again arranged in a “U” shape, this time the connecting part 23 is folded to arrange the two support parts 22, 24 opposite each other. More particularly, the support parts 22, 24 are spaced apart so as to be separated by a gap 21. It can be seen here that the minimum main surface of the printed circuit 20 is divided into a stack in height of the support parts 22, 24.

[0079] Indeed, in [Fig.6], a first 22 of the parts 22, 24 carries electronic components 30, and a second 24 of the support parts 22, 24 is folded over the first 22. The second support part 24 also carries electronic components 30 which have been omitted to simplify the representation. Advantageously, the first support part 22 carries power electronic components 30 (also called “hot electronic components”) which can generate more heat, and the second support part 24 preferentially carries lower power components (also called “low power components”). cold electronics”) having minimal impact on heat generation compared to the first 22 support part.

[0080] Such an arrangement of the electronic components 30 makes it possible to separate the “hot” components from the “cold” components so that the “cold” components are not impacted by the heat released by the hot components. In addition, because the hot components generally require higher power, when the printed circuit 20 is mounted on the frame 8, the first support portion 22 is arranged proximal to the power supply line (not shown) and the second support portion 24 is arranged distal to the power supply line (not shown). Thus, the connecting portion 23 will not have to support a transfer of high electrical power.

[0081] Furthermore, the “U” shape adopted by the printed circuit 20 is all the more advantageous because it makes it possible to form a layer of air between the first 22 and the second 24 support parts. The air is advantageously contained at the level of the gap 21. The air acts as an insulator and the evacuation of heat is promoted by convection between these two support parts 22, 24. In addition, with such an arrangement, not only does the printed circuit 20 occupy a restricted space, but the electronic components 30 are also included in a restricted space. Indeed, the components 30 below the support part 24 face components 30 above the support part 22 in the gap 21, which increases the compactness of the printed circuit 20.

[0082] The gap 21 between the support parts 22, 24 is adjustable according to the height of the electronic components 30. Preferably, the capacitors 32 capable of storing electrical charges are placed at the front end of the first support part 22 as close as possible to the power supply line (not shown). These capacitors 32 are hot electronic components that generally dissipate a lot of heat. As can be seen in [Fig.7], the second support part 24 does not cover these capacitors 32 to facilitate heat dissipation and thus ensure the thermal operability of all the electronic components 30 of the printed circuit 20.Thus, in such a configuration, the minimum surface area for implantation of the printed circuit 20 is very reduced for a height substantially equivalent to the maximum height of the electronic components 30, in particular the “hot electronic components”, in particular the capacitors 32 in the example of figures 6 and 7.

[0083] The invention is not limited to the embodiments presented and other embodiments will become clear to those skilled in the art. It is in particular possible to provide a configuration other than an “L” or “U” shape of the printed circuit provided that the non-coplanarity of the support parts is respected. List of references

[0084] 1: braking system 2a, 2b: friction elements 3: disc 4: vehicle 5: wheel 7: clamping device 8: built 9: screed 10: brake caliper 12: electric actuator 13: protective cover 19: electronic control device 20: printed circuit board 21: gap 22: first part of support 24: second part of support 26: third part of support 23: first part of the connection 25: second part of the connection 30: electronic components 32: capacitors

Claims

Claims

1. Clamping device (7) for a braking system (1) intended to exert a relative movement between friction elements (2a, 2b) and comprising a frame (8) supporting an electric actuator (12) intended to provide the clamping force and an electronic control device (19) connected to a power supply line to control the electric actuator (12) in order to carry out the clamping, characterized in that the electronic control device (19) comprises a printed circuit (20) comprising at least two support parts (22, 24, 26) carrying electronic components (30) and a connecting part (23) connecting the two support parts (22, 24, 26) to ensure the transmission of electrical energy, and in that the connecting part (23) forms an articulation allowing the two support parts (22, 24, 26) to be arranged in a non-coplanar manner.

2. Clamping device (7) according to the preceding claim, in which, with respect to the connecting part (23), each support part (22, 24, 26) comprises at least one polymer stiffening layer making it possible to support the electronic components (30).

3. A clamping device (7) according to any preceding claim, wherein the clamping device (7) comprises a frame (8), the electronic control device (19) being mounted on the frame (8) and covered by a protective cover (13).

4. A clamping device (7) according to any preceding claim, wherein a first of the support portions (22, 24, 26) carries power electronic components and a second of the support portions (22, 24, 26) carries lower power electronic components relative to the first support portion.

5. Clamping device (7) according to the preceding claim, in which the power electronic components comprise capacitors and / or power transistors, high-power integrated circuits, processors, power converters.

6. A clamping device (7) according to claim 4 or 5, wherein the support portion carrying the power electronic components is arranged proximal to the power line and the support portion carrying the lower power electronic components is arranged distal to the power line.

7. Clamping device (7) according to any one of the preceding claims- preceding, in which at least two support parts (22, 24, 26) are arranged in parallel, facing each other.

8. A clamping device (7) according to any preceding claim, wherein the printed circuit (20) is arranged in a u-shape TT ss

9. A clamping device (7) according to any preceding claim, wherein at least two adjacent support portions (22, 24, 26) are arranged to form an angle of 90° or less.

10. Clamping device (7) according to any one of the preceding claims, in which the printed circuit (20) comprises at least one third support part intended to carry electronic components (30) and connected to one of the two first support parts (22, 24, 26) using a second connecting part (25) to ensure the transmission of electrical energy and forming an articulation allowing the third support part to be arranged in a non-coplanar manner relative to said one of the two first support parts (22, 24, 26).

11. Vehicle braking system (1) comprising a pair of friction elements (2a, 2b) intended to cooperate by friction with a disc (3), characterized in that it comprises at least one clamping device (7) according to any one of the preceding claims for bringing the pair of friction elements (2a, 2b) towards two opposite faces of the disc (3) in order to clamp it.

12. Vehicle (4) characterized in that it comprises a braking system (1) according to the preceding claim.

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