Anti-rotation system

Abstract

An anti-rotation system (1), in particular for a braking feeling simulator device (2) for a braking system (3) of the Brake-By-Wire type of a vehicle, comprising a cylinder body (5), extended along a actuation axis (6), and forming a cylinder compartment (7) within it; a piston body (8), sliding housed in the cylinder compartment (7); in which the cylinder compartment (7) has a substantially cylindrical shape extended coaxial to the actuation axis (6), in which the piston body (8) is suitable for connection to a pedal or brake lever (4), so that an actuation of the pedal or brake lever (4) corresponds to a translation of the piston body (8) with respect to the cylinder body (5) along the actuation axis (6), where the anti-rotation system (1) comprises an anti-rotation pin (9) and a pin accommodation seat (10), where the pin accommodation seat (10) is extended along a receptive axis (11), and is shaped to accommodate the anti-rotation pin (9) in the direction of the accommodation axis (11) to make a coupling with the anti-rotation pin (9), where the pivot reception site (10) is formed by a first accommodation seat (12) and a second accommodation seat (13) facing each other along the accommodation axis (11), where the first accommodation seat (12) is defined by the cylinder body (5), and where the second accommodation seat (13) is defined by the piston body (8), and where the accommodation axis (11) is extended along a direction that is neither radial nor parallel to the actuation axis (6).

Description

"Anti-rotation system"

[0001] Field of invention

[0002] The present invention concerns an anti-rotation system, in particular an antirotation system for a braking feeling simulator device for a Brake-By-Wire ("BBW') braking system of vehicles with two or more wheels, which can be operated by a driver by means of a brake pedal or lever.

[0003] State of the art

[0004] In BBW braking systems there is a decoupling between the force and displacement applied to the brake pedal or lever by the driver and the resulting braking force that is applied by the calipers to the wheels of the vehicle. The force and displacement exerted by the driver on the brake pedal or lever are transduced into an electrical signal that is processed by a control unit to control the operation of the braking system calipers. As a result, it is known to equip BBW braking systems with a braking feeling simulator device connected to the brake pedal or lever and configured to simulate the feel and stiffness of a brake pedal or lever of conventional hydraulic braking systems, and thus emulate its "stiffness curve".

[0005] The inventors are aware of braking feeling simulator devices that include a piston extended along an actuation axis, connected to the pedal or brake lever of a vehicle, slidingly housed inside a cylinder so as to translate inside the cylinder at an actuation of the pedal or brake lever. The piston is equipped with a permanent magnet, while the cylinder is equipped with a position sensor to detect the position of the permanent magnet integral with the piston. The detection of the actuation of the pedal or brake lever is then determined by a reading of the movement of the permanent magnet, inside the cylinder, via the position sensor.

[0006] In addition, these braking feeling simulators known to the inventors are equipped with an anti-rotation system, designed to prevent any relative rotation between the piston and the cylinder. In fact, any relative rotation between the piston and the cylinder would lead to a false reading by the position sensor, since it would cause a distance between the permanent magnet and the position sensor that would be detected by the position sensor and mistakenly associated with an actuation of the pedal or brake lever.

[0007] The inventors are aware of an anti-rotation system that includes an antirotation pin inserted into corresponding seats formed in the cylinder and piston, extended along a radial direction to the piston actuation axis. This anti-rotation system has the advantage of effectively preventing a relative rotation between piston and cylinder andat the same time is a non-complex technical solution that can be implemented with reduced costs. However, it is a configuration that requires a specific seat on the cylinder dedicated to the insertion of the anti-rotation pin, which extends protruding from the external surface of the cylinder. This is necessary because attaching the anti-rotation pin to the cylinder requires a certain minimum thickness of the cylinder wall into which the anti-rotation pin is inserted and screwed. As a result, this configuration has undesirable dimensions, excess material intended to form the thickest portion of the cylinder, as well as protruding parts that can collide with the vehicle driver as well as affecting the aesthetics of the device.

[0008] From the prior art known to the inventors, it is therefore necessary to create an anti-rotation system that has reduced dimensions, a reduced amount of overall material, a reduced amount of any protruding or protruding portions, and at the same time is an effective solution in preventing relative rotation between two moving parts of the braking feeling simulator device as well as easy to implement and at reduced costs.

[0009] Solution

[0010] The purpose of the present invention is to provide an anti-rotation system, in particular for a braking feeling simulator device of the BBW type, such as to obviate at least some of the drawbacks highlighted in the art known to the inventors.

[0011] A particular purpose of the present invention is to provide an anti-rotation system, in particular for a braking feeling simulator device, which has a reduced overall dimension and requires a reduced amount of material.

[0012] A further particular purpose of the present invention is to provide an antirotation system, in particular for a braking feeling simulator device, which reduces or avoids the presence of protruding or protruding portions.

[0013] A further particular purpose of the present invention is to provide an antirotation system, in particular for a braking feeling simulator device, which effectively prevents relative rotation between two moving parts and which presents construction complexities and reduced costs.

[0014] These and other purposes are achieved by means of an anti-rotation system, in particular for a braking feeling simulator device, according to claim 1.

[0015] Dependent claims refer to preferred and advantageous embodiments of the present invention.

[0016] Figures

[0017] In order to better understand the invention and appreciate its advantages, some of its exemplary and non-limiting embodiments will be described below, referringto the attached figures, in which:

[0018] - Figure 1 is a perspective view of an anti-rotation system, according to a form of realization of the invention;

[0019] - Figure 2 is a side view of the anti-rotation system represented in figure 1;

[0020] - Figure 3 is an exploded view of the anti-rotation system represented in figure1 ;

[0021] - Figure 4 is a top view of the anti-rotation system represented in figure 1 , in a partially disassembled configuration;

[0022] - Figure 5 is an axial section view of the anti-rotation system represented in figure 1 ;

[0023] - Figure 6 is a perspective view of a component of the anti-rotation system represented in figure 1 ;

[0024] - Figure 7 is a magnified view of a detail of the anti-rotation system represented in figure 5.

[0025] Description of some preferred embodiments

[0026] The present invention is suitable for application to Brake-By-Wire ("BBW") braking systems of vehicles with two or more wheels that can be operated by a driver by means of a brake pedal or brake lever. Therefore, in this description, the term "brake pedal or lever" is intended to refer without distinction to both a brake pedal for motor vehicles and the like, and a brake lever or brake pedal for motorcycles, mopeds and the like, unless otherwise specified.

[0027] Anti-rotation system 1

[0028] With reference to the figures, an anti-rotation system is generally indicated by reference number 1.

[0029] Anti-rotation system 1 is particularly suitable for a braking feeling simulator device 2 for a braking system 3 of the Brake-By-Wire ("BBW') type.

[0030] The anti-rotation system 1 comprises a cylinder body 5, extended along a actuation axis 6. Preferably, the cylinder body 5 is extended substantially coaxially to the actuation axis 6.

[0031] The cylinder body 5 forms a cylinder compartment 7 within it.

[0032] The anti-rotation system 1 also includes a piston body 8. The piston body 8 is slidably housed within the cylinder compartment 7. Preferably, the piston body 8 is positioned substantially coaxial to the actuation axis 6.

[0033] The cylinder compartment 7 has a substantially cylindrical shape extendedcoaxial to the actuation axis 6.

[0034] The piston body 8 is suitable for connection to a pedal or brake lever 4, in particular a braking system 3, so that an actuation of the pedal or brake lever 4 corresponds to a translation of the piston body 8 with respect to the cylinder body 5 along the actuation axis 6.

[0035] The anti-rotation system 1 includes an anti-rotation pin 9 and a pin accommodation seat 10.

[0036] The pin accommodation seat 10 is extended along an accommodation axis 11. In addition, the pin accommodation seat 10 is shaped to accommodate the antirotation pin 9 in the direction of the accommodation axis 11 , thereby establishing a coupling with the anti-rotation pin 9, preferably a form-fit and / or threaded coupling.

[0037] As a result, the anti-rotation pin 9 accommodated in the pin accommodation seat 10 is connected to the receptive pin receptor 10 by means of a form and / or threaded coupling.

[0038] In addition, when the anti-rotation pin 9 is inserted into the pin accommodation seat 10, the anti-rotation pin 9 is also extended along the accommodation axis 11 , preferably the anti-rotation pin 9 is substantially coaxial to the accommodation axis 11.

[0039] The pin accommodation seat 10 is formed by a first accommodation seat 12 and a second accommodation seat 13, facing each other along the accommodation axis 11 , in particular overlapping along the accommodation axis 11.

[0040] The first accommodation seat 12 is defined by the cylinder body 5. The second accommodation seat 13 is defined by the piston body 8.

[0041] Furthermore, the accommodation axis 11 is extended along a direction that is neither radial nor parallel to the actuation axis 6.

[0042] Advantageously, an anti-rotation system 1 configured in this way effectively prevents a relative rotation between piston body 8 and cylinder body 5, by providing the pin accommodation seat 10 formed jointly by piston body 8 and cylinder body 5, inside which the anti-rotation pin 9 is inserted.

[0043] With a further advantage, an anti-rotation system 1 configured in this way has reduced overall dimensions and requires a reduced amount of material since the accommodation axis 11 along which the pin accompaniment seat 10 develops is not radial to the actuation axis 6, but is instead extended along a direction that is neither radial nor parallel to the actuation axis 6. This allows the first accommodation seat 12 to be developed along a direction that is incident to, and not radial to, the cylinder body 5, which encounters a greater quantity of material of the cylinder body 5. Therefore, thisconfiguration enables a secure connection of the anti-rotation pin 9 to the pin accommodation seat 10, and in particular to the first accommodation seat 12 defined by the cylinder body 5, without necessarily requiring protruding or overhanging portions from the cylinder body, nor oversizing the desired thickness of the cylinder body 5.

[0044] With a further advantage, the reduction or absence of protruding portions of the cylinder body 5 intended for the realization of the first accommodation seat 12 reduces the risk of collisions with the pilot’s body, for example with the pilot's foot, and does not affect the aesthetic appearance of the braking feeling simulator device 2 to which the anti-rotation system 1 configured in this way is applicable.

[0045] According to an embodiment, the accommodation axis 11 extends along a direction that is not incident to the actuation axis 6.

[0046] As a result, the accommodation axis 11 is extended along a direction that is neither radial nor parallel nor incident to the actuation axis 6.

[0047] According to an embodiment, the accommodation axis 11 is extended in a plane orthogonal to the actuation axis 6.

[0048] Second accommodation seat 13

[0049] The second accommodation seat 13 is extended along a direction parallel to the actuation axis 6.

[0050] This allows a relative translation between piston body 8 and cylinder body 5 along the actuation axis 6, and therefore between the piston body 8 and the anti-rotation pin 9 integral with the cylinder body 5.

[0051] According to an embodiment, the second accommodation seat 13 is extended in a direction parallel to the actuation axis 6 for a length shorter than the total length of the piston body 8 in the direction of the actuation axis 6.

[0052] According to an embodiment, the second accommodation seat 13 is extended in a direction parallel to the actuation axis 6 to a length of 1 / 6 to 1 / 2, or 1 / 5 to 1 / 3, of the total length of the piston body 8 in the direction of the actuation axis 6.

[0053] According to an embodiment, the second accommodation seat 13 extends internally to the piston body 8.

[0054] According to an embodiment, the second accommodation seat 13 is a blind seat, open in the direction external to the piston body 8.

[0055] According to an embodiment, the second seat 13 is defined by a recess or pocket or groove in the piston body 8.

[0056] According to an embodiment, the second reception area 13 is open at least ina direction radially outward from the actuation axis 6.

[0057] According to an embodiment, the second accommodation seat 13 is open at least in a direction parallel to the accommodation axis 11 and in a direction transverse to both the actuation axis 6 and the accommodation axis 11 (Fig. 6).

[0058] The piston body 8 defines an outer piston surface 15.

[0059] The outer piston surface 15 includes a cylindrical surface portion 16, having a substantially cylindrical or cylinder arch shape, coaxial to the actuation axis 6.

[0060] According to an embodiment, the second accommodation seat 13 is defined by a cut along an arc of the cylindrical surface portion 16. In particular, the cut is extended in a direction parallel to the actuation axis 6.

[0061] According to an embodiment, the second accommodation seat 13 is defined by a first abutment wall 17 and a second abutment wall 18.

[0062] The first abutment wall 17 and the second abutment wall 18 converge together in an inner edge 19. The inner edge 19 is extended in a direction parallel to the actuation axis 6.

[0063] As a result, both the first abutment wall 17 and the second abutment wall 18 extend from the inner edge 19 to the outer piston surface 15, in particular in a divergent manner. In particular, at least one between the first abutment wall 17 and the second abutment wall 18 extends from the inner edge 19 to the cylindrical surface portion 16.

[0064] For example, the inner edge 19 is an inner edge or an internal chamfer or an internal fillet. The inner edge 19 is therefore radially positioned closer to the actuation axis 6 than the cylindrical surface portion 16.

[0065] According to an embodiment, the first abutment wall 17 and the second abutment wall 18 are orthogonal to each other. In this way, the first abutment wall 17 and the second abutment wall 18 define a right angle between them at the inner edge 19.

[0066] According to an embodiment, the first abutment wall 17 is extended along a plane parallel to the actuation axis 6 and the accommodation axis 11 .

[0067] According to an embodiment, the second abutment wall 18 is extended along a plane orthogonal to the accommodation axis 11.

[0068] Advantageously, a second accommodation seat 13 configured in this way can be easily and cost-effectively implemented and effectively prevents relative rotation between the piston body 8 and the cylinder body 5. An accommodation seat 13 configured in this way is, for example, easily achievable by milling incident to the outer piston surface 15 in a direction parallel or transverse to the accommodation axis 11 , andcarried out on the outer piston surface 15 along a direction parallel to the actuation axis 6.

[0069] With a further advantage, an anti-rotation system 1 configured in this way has reduced overall dimensions and requires a reduced amount of material since the second accommodation seat 13 develops along a direction substantially tangent to the piston body 8, which therefore allows the first accommodation seat 12 of the cylinder body 5 to be realized along an incident direction, and not radial, to the cylinder body 5 which encounters a greater quantity of material, which can be used, for example, to create an adequate thread suitable for screwing the anti-rotation pin 9 to the cylinder body 5.

[0070] With a further advantage, this configuration allows the use of an anti-rotation pin 9 of reduced dimensions, or in any case less performing than the art known to the inventors, since the anti-rotation pin 9 is configured to prevent the rotation of the piston body 8 with respect to the cylinder body 5, working at least in compression. With reference to Fig. 5 and 7, this is done in particular to prevent any counterclockwise rotation of the piston body 8 around the actuation axis 6, which is prevented by the abutment between the second abutment wall 18 and the anti-rotation pin 9, which is subjected to compressive stress.

[0071] For example, the anti-rotation pin 9 is an M4-type screw, or of dimensions similar to an M4-type screw, whereas in the art known to the inventors, a screw of at least M6-type is required.

[0072] According to an embodiment, the piston body 8 defines a housing cavity 20 on the inside, which is open in the direction outside the actuation axis 6.

[0073] According to an embodiment, the housing cavity 20 is blind, alternatively it passes through in the radial direction to the actuation axis 6.

[0074] The housing cavity 20 is suitable for housing an element detectable by a position sensor 21 , in particular it is suitable for housing a permanent magnet 22.

[0075] According to an embodiment, the housing cavity 20 is defined by an arc cut in the cylindrical surface portion 16, preferably extended in a direction parallel to the actuation axis 6.

[0076] Advantageously, a housing cavity 20 configured in this way allows the permanent magnet 22 to be incorporated within the radial footprint of the piston body 8.

[0077] "Radial footprint" means the projection on a plane transverse to the actuation axis 6 of the greatest extension of a component in the radial direction to the actuation axis 6.

[0078] According to an embodiment, the housing cavity 20 is at least partially definedby a cavity plane 23 substantially extended along a plane parallel to the actuation axis 6 and transverse to the accommodation axis 11.

[0079] The cavity plane 23 is extended between two opposite plane ends 24. Each plane end 24 is extended in the direction parallel to the actuation axis 6.

[0080] According to an embodiment, the second accommodation seat 13 is defined by a cut made at one plane end 24 (fig. 6).

[0081] Advantageously, this configuration allows for a reduction in the overall dimensions of the anti-rotation system 1 , integrating in a small space both the housing cavity 20 for housing the permanent magnet 22 or a different detectable element, and the accommodation seat 13 for accommodation the anti-rotation pin 9. Furthermore, in this configuration the radial dimensions of the second accommodation seat 13 and the housing cavity 20 are at least partially overlapping or intersecting.

[0082] In addition, the coupling between the anti-rotation pin 9 and the piston body 8 offset and parallel to the coupling between the permanent magnet 22 and the piston body 8 prevents interference between the stroke of the permanent magnet 22 fixed to the piston body 8, and the anti-rotation pin 9 slidingly coupled to the piston body 8. In addition, this offset and parallel coupling avoids the need to place the permanent magnet 22 and the anti-rotation pin 9 on axes that are transverse to each other or otherwise not parallel, thereby preventing an increase in the overall dimensions.

[0083] With a further advantage, the accommodation of the permanent magnet 22 and the anti-rotation pin 9 are obtained through respective mechanical machining for chip removal that can be easily achieved and with reduced costs.

[0084] According to an embodiment, the detectable element, in particular the permanent magnet 22, and the housing cavity 20 are shaped in such a way that they can be coupled via a form-fit coupling.

[0085] According on an embodiment, piston body 8 also includes a female seat 25, which is defined, for example, by a blind hole or through piston body 8 in the radial direction to the actuation axis 6.

[0086] The female seat 25 is defined within the housing cavity 20. In particular, the female seat 25 develops along a direction orthogonal to the cavity plane 23.

[0087] Consequently, the female seat 25 is extended along a direction parallel to the accommodation axis 11. The accommodation axis 11 is therefore offset with respect to the direction along which the female site 25 is extended.

[0088] Advantageously, the female seat 25 is suitable for a male-female coupling with a respective male body of the detectable element, in particular the permanent magnet22, in which this male body can be at least partially inserted into the female seat 25, and can for example be fixed integral to the piston body 8 by means of a threaded element that can be inserted into the female seat 25 in the opposite direction to the male body and screwed onto the male body.

[0089] The cylindrical surface portion 16 defines a piston radius R (fig. 5 and 7). The piston radius R therefore represents the distance between the cylindrical surface portion 16 and the actuation axis 6.

[0090] According to an embodiment, the accommodation axis 11 is positioned at a distance D from the actuation axis 6 between:

[0091] - 0.5R and R, or

[0092] - 0.7R and 0.95R, or

[0093] - 0.8R and 0.9R, or

[0094] where D is essentially equal to 0.85R.

[0095] The distance D therefore represents the shortest distance between the accommodation axis 11 and the actuation axis 6 along a direction radial to the actuation axis 6.

[0096] First accommodation seat 12

[0097] The cylinder body 5 defines an outer cylindrical surface 26.

[0098] The outer cylindrical surface 26 includes a cylindrical surface portion 27, having a substantially cylindrical or cylinder arc shape, coaxial to the actuation axis 6.

[0099] According to an embodiment, the first accommodation seat 12 is a through hole, extended along the accommodation axis 11. In particular, the first accommodation seat 12 is a through hole internally threaded by means of an internal thread 31.

[0100] The cylinder body 5 also includes a defined insertion hole 14 on the outer cylindrical surface 26. The insertion hole 14 allows the anti-rotation pin 9 to be inserted from the outside of the cylinder body 5 into the first accommodation seat 12.

[0101] The first accommodation seat 12 configured in this way is therefore extended from the insertion hole 14 to the cylinder compartment 7, and thus allows an insertion of the anti-rotation pin 9 from the outside of the cylinder body 5 through the insertion hole 14, and a screwing of the anti-rotation pin 9 to the internal thread 31 to the first accommodation seat 12.

[0102] In this way, the anti-rotation pin 9 is screwed to the first accommodation seat 12 and flows into the second accommodation seat 13, preventing relative rotation between the piston body 8 and the cylinder body 5.

[0103] According to an embodiment, the anti-rotation pin 9 is included in the radial footprint of the cylinder body 5.

[0104] According to an embodiment, the cylinder body 5 includes a coupling seat 28. In particular, the coupling seat 28 is suitable for coupling with a sensor housing 29, which houses a position sensor 21.

[0105] According to an embodiment, the insertion hole 14 is defined in the coupling seat 28.

[0106] In this way, in an assembled configuration, the sensor housing 29 is positioned superimposed on the insertion hole 14, and therefore on the anti-rotation pin 9, along the accommodation axis 11. That is, the insertion hole 14, and therefore the anti-rotation pin 9, is facing the sensor housing 29 in the direction of the accommodation axis 11 .

[0107] This configuration is advantageous to reduce overall dimensions, as the radial footprint of the anti-rotation pin 9 and the sensor housing 29 are overlapped, as well as to cover the anti-rotation pin 9 by means of the sensor housing 29, thus making the antirotation pin 9 less exposed to atmospheric elements.

[0108] Optionally, the coupling seat 28 is defined by a blind seat.

[0109] According to an embodiment, the cylinder body 5 includes at least one containment wall 36 and a bottom wall 30, which at least partially delimit the coupling seat 28.

[0110] Preferably, the bottom wall 30 extends substantially in a direction parallel to the actuation axis 6, while at least one containment wall 36 extends in a transverse direction to the actuation axis 6.

[0111] According to an embodiment, the bottom wall 30 is substantially coplanar or tangent to the cylindrical surface portion 27 of the outer cylindrical surface 26.

[0112] In assembled configuration, the sensor housing 29 is placed on top of the bottom wall 30, in the transverse direction to the actuation axis 6.

[0113] According to an embodiment, the insertion hole 14 is defined in the bottom wall 30.

[0114] Advantageously, this configuration reduces the overall footprint of the antirotation system 1 , since the first accommodation seat 12 extends below the sensor housing 29. With a further advantage, since the accommodation seat 12, and in particular the insertion hole 14, are covered by the sensor housing 29, the anti-rotation pin 9 is less exposed to atmospheric agents and is therefore suitable for fabrication from materials that do not require special weather resistance.

[0115] According to an embodiment, the cylinder body 5 comprises two opposing containment walls 36, positioned along a direction parallel to the actuation axis 6, which delimit the extension of the coupling seat 28 in a direction parallel to the actuation axis 6. The bottom wall 30 is extended between the two opposite containment walls 36.

[0116] According to an embodiment, the bottom wall 30 includes a relief 32. Relief 32 is extended in a direction substantially transverse to the actuation axis 6.

[0117] According to an embodiment, the insertion hole 14 is defined on relief 32.

[0118] Advantageously, this configuration allows the insertion hole 14 to be brought closer to the sensor housing 29, and thus the anti-rotation pin 9 is covered more by means of the sensor housing 29.

[0119] Additional components of the anti-rotation system 1

[0120] According to an embodiment, the anti-rotation system 1 includes the position sensor 21 described above, which is configured to detect the position or a translation of the piston body 8 with respect to the cylinder body 5. In particular, the position sensor 21 is configured to detect the position or a translation of a detectable element connected integral to the piston body 8, for example the permanent magnet 22 described above.

[0121] The position sensor 21 is housed inside the sensor housing 29 described above. In particular, the sensor housing 29 is housed in the coupling seat 28, is positioned superimposed on the bottom wall 30, in the direction transverse to the actuation axis 6.

[0122] According to an embodiment, the sensor housing 29 comprises a coupling body 33 and a wiring body 34. The coupling body 33 is configured to make a mechanical coupling between the sensor housing 29 and the cylinder body 5, in particular the coupling seat 28. The wiring body 34 is configured to allow an electrical connection between the position sensor 21 and an external power source to the anti-rotation system 1. The wiring body 34 is connected to the coupling body 33, preferably it is made of workpiece with the coupling body 33 or co-moulded with the coupling body 33. According to an embodiment, the coupling body 33 is connected to the cylinder body 5 by means of at least one fastening screw. According to an embodiment, the wiring body 34 protrudes from the coupling body 33, in the transverse direction to the coupling body 33. According to an embodiment, the coupling body 33 is connected to the cylinder body 5, in particular to the coupling seat 28, via a male-female connection, for a connection preferably in the radial direction to the actuation axis 6. In connected configuration, the coupling body 33 faces the anti-rotation pin 9.

[0123] Braking Feeling Simulator Device 2

[0124] According to a further aspect of the invention, a feeling simulator device 2, in particular for a braking system 3 of the Brake-By-Wire ("BBW") type, includes the antirotation system 1 described above.

[0125] The braking feeling simulator device 2 can be connected to a brake pedal or lever 4, in particular of the braking system 3, so that an actuation of the pedal or brake lever 4 corresponds to a translation of the piston body 8 inside the cylinder body 5 of the anti-rotation system 1 , along the actuation axis 6.

[0126] According to an embodiment, the piston body 8 is connected to the brake pedal or lever 4 via a pushrod 35. Preferably, the pushrod 35 is directly connected to the piston body 8 by means of mechanical means of connection, e.g. a mechanical joint.

[0127] The braking feeling simulator device 2 also includes an absorber assembly. The absorber assembly is configured to exert a reaction force on the pedal or brake lever 4 as opposed to an actuation of the pedal or brake lever 4. The absorber assembly is located inside the cylinder body 5, in the cylinder compartment 7. According to an embodiment, the absorber assembly is placed between cylinder body 5 and piston body 8. In particular, the absorber assembly is positioned opposite the brake lever or pedal 4, or the pushrod 35, with respect to the piston body 8. According to a form of realization, the absorber assembly includes a plurality of elastic elements positioned in series and / or parallel inside the cylinder body 5. According to an embodiment, the elastic elements include compression coil springs that are positioned substantially coaxial to the actuation axis 6 and / or disc springs and / or square springs and / or torsional springs and / or band springs and / or shaped springs.

[0128] According to an embodiment, the braking feeling simulator device 2 is of the dry type. The piston body 8 and the absorber group are therefore not immersed in hydraulic fluid, resulting in a reduction in costs and construction complexity.

[0129] Braking system 3

[0130] According to a further aspect of the invention, a braking system 3, in particular of the Brake-By-Wire ("BBW') type, comprises a brake pedal or lever 4 operationally connected to the braking feeling simulator device 2 described above.

[0131] The braking system 3 includes at least one brake caliper.

[0132] In addition, the braking system 3 includes an electronic processing unit. The electronic processing unit is configured to operate at least one brake caliper when the position sensor 21 detects a movement of the piston body 8 with respect to the cylinder body 5.

[0133] Advantageously, a braking system 3 configured in this way can be integratedboth in motorcycles or motorcycles with at least two wheels, both for the front and rear brakes, and in motor vehicles and heavy vehicles such as vans and trucks.

[0134] Naturally, a person skilled in the art will be able to make modifications or adaptations to the present invention, without however departing from the scope of the claims set forth below.List of references1. Anti-rotation system2. Braking Feeling Simulator Device3. Braking system4. Pedal or brake lever5. Cylinder body6. Actuation axis7. Cylinder Compartment8. Piston body9. Anti-rotation pin10. Pin accommodation seat11. Accommodation axis12. First accommodation seat13. Second accommodation seat14. Insertion hole15. Outer piston surface16. Cylindrical surface portion (of the piston)17. First abutment wall18. Second abutment wall19. Inner edge20. Housing cavity21. Position sensor22. Permanent magnet23. Cavity plane24. Plane end25. Female seat26. Outer cylindrical surface27. Cylindrical (cylinder) surface portion28. Coupling seat29. Sensor housing30. Bottom wall31. Internal thread32. Relief33. Coupling body34. Wiring body35. Pushrod36. Containment wallR. Piston radiusD. Distance

Claims

Claims1. An anti-rotation system (1), in particular for a braking feel simulator device (2) for a braking system (3) of the Brake-By-Wire type of a vehicle, comprising:- cylinder body (5), extending along an actuation axis (6), and forming a cylinder compartment (7) therein;- a piston body (8), slidingly housed in the cylinder compartment (7); wherein the cylinder compartment (7) has a substantially cylindrical shape extending coaxial to the actuation axis (6), wherein the piston body (8) is suitable for being connectable to a brake pedal or lever (4), so that an actuation of the brake pedal or lever (4) corresponds to a translation of the piston body (8) with respect to the cylinder body (5) along the actuation axis (6), wherein the anti-rotation system (1) comprises an anti-rotation pin (9) and a pin accommodation seat (10), wherein the pin accommodation seat (10) extends along an accommodation axis (11), and is shaped to accommodate the anti-rotation pin (9) in the direction of the accommodation axis (11) to realize a coupling with the anti-rotation pin (9), wherein the pin accommodation seat (10) is formed by a first accommodation seat (12) and a second accommodation seat (13) mutually facing along the accommodation axis (11), wherein the first accommodation seat (12) is defined by the cylinder body (5), and wherein the second accommodation seat (13) is defined by the piston body (8), and wherein the accommodation axis (11) extends along a direction neither radial nor parallel to the actuation axis (6).

2. An anti-rotation system (1) according to claim 1 , wherein the accommodation axis (11) extends along a direction not incident to the actuation axis (6).

3. An anti-rotation system (1) according to claim 1 or 2, wherein the accommodation axis (11) extends comprised in a plane orthogonal to the actuation axis (6).

4. An anti-rotation system (1) according to any one of the preceding claims, wherein the second accommodation seat (13) extends inside the piston body (8), and / or wherein the second accommodation seat (13) is a blind seat, open in an external direction with respect to the piston body (8), and / or wherein the second accommodation seat (13) is defined by a recess or pocket or groovein the piston body (8), and / or wherein the second accommodation seat (13) is open at least in a radially external direction with respect to the actuation axis (6).

5. An anti-rotation system (1) according to any one of the preceding claims, wherein the second accommodation seat (13) is open at least in a direction parallel to the accommodation axis (11) and in a direction transverse to both the actuation axis (6) and the accommodation axis (11).

6. An anti-rotation system (1) according to any one of the preceding claims, wherein the piston body (8) defines an outer piston surface (15), wherein the outer piston surface (15) comprises a cylindrical surface portion (16) being substantially cylindrical or cylinder-arc-shaped, coaxial to the actuation axis (6), and wherein the second accommodation seat (13) is defined by a cut along an arc of the cylindrical surface portion (16) extending in a direction parallel to the actuation axis (6).

7. An anti-rotation system (1) according to any one of the preceding claims, wherein the second accommodation seat (13) is defined by a first abutment wall (17) and a second abutment wall (18), wherein the first abutment wall (17) and the second abutment wall (18) mutually converge in an inner edge (19) extending along a direction parallel to the actuation axis (6), and wherein the first abutment wall (17) and the second abutment wall (18) extend from the inner edge (19) to the outer piston surface (15).

8. An anti-rotation system (1) according to claim 7, wherein the first abutment wall (17) and the second abutment wall (18) are mutually orthogonal, wherein the first abutment wall (17) extends along a plane parallel to the actuation axis (6) and the accommodation axis (11), and wherein the second abutment wall (18) extends along a plane orthogonal to the accommodation axis (11).

9. An anti-rotation system (1) according to any one of the preceding claims, wherein the piston body (8) defines a housing cavity (20) therein, open in an external direction with respect to the actuation axis (6), wherein the housing cavity (20) is suitable for housing an element detectable by a position sensor (21), optionally is suitable for housing apermanent magnet (22), wherein the housing cavity (20) is defined by a cut along an arc of the cylindrical surface portion (16) extending in a direction parallel to the actuation axis (6), wherein the housing cavity (20) is at least partially defined by a cavity plane (23) substantially extending along a plane parallel to the actuation axis (6) and transverse to the accommodation axis (11), wherein the cavity plane (23) extends between two opposite plane ends (24), wherein each plane end (24) extends in a direction parallel to the actuation axis (6), and wherein the second accommodation seat (13) is defined by a cut made in a plane end (24), and wherein, optionally, the piston body (8) comprises a female seat (25) defined by a blind or through hole through the piston body (8) in a radial direction with respect to the actuation axis (6), wherein the female seat (25) is suitable for realizing a male-female coupling with a respective male body of the detectable element, optionally of the permanent magnet (22), and wherein the female seat (25) is defined within the housing cavity (20).

10. An anti-rotation system (1) according to any one of the preceding claims, wherein the piston body (8) defines an outer piston surface (15), wherein the outer piston surface (15) comprises a cylindrical surface portion (16) being substantially cylindrical or cylinder-arc-shaped, coaxial to the actuation axis (6), wherein the cylindrical surface portion (16) defines a piston radius “R”, and wherein the accommodation axis (11) is positioned at a distance “D” from the actuation axis (6) between:- 0.5R and R, or- 0.7R and 0.95R, or- 0.8R and 0.9R, or wherein “D” is substantially equal to 0.85R.

11. An anti-rotation system (1) according to any one of the preceding claims, wherein the cylinder body (5) defines an outer cylinder surface (26), wherein the outer cylinder surface (26) comprises a cylindrical surface portion (27) being substantially cylindrical or cylinder-arc-shaped, coaxial to the actuation axis (6), wherein the first accommodation seat (12) is a through hole extending along the accommodation axis (11) and internally threaded by means of an internal thread (31),wherein the cylinder body (5) comprises an insertion hole (14) defined on the outer cylinder surface (26), for the insertion of the anti-rotation pin (9) from the outside of the cylinder body (5) into the first accommodation seat (12), and wherein the anti-rotation pin (9) is screwed to the first accommodation seat (12) and leads into the second accommodation seat (13), preventing a relative rotation between piston body (8) and cylinder body (5), and wherein, optionally, the anti-rotation pin (9) is enclosed within the radial volume of the cylinder body (5).

12. An anti-rotation system (1) according to claim 11 , wherein the cylinder body (5) comprises a coupling seat (28) adapted to realize a coupling with a sensor housing (29) which houses a position sensor (21), wherein the insertion hole (14) is defined in the coupling seat (28) so that, in an assembled configuration, the sensor housing (29) is positioned to be superimposed on the insertion hole (14) along the accommodation axis (11), and wherein, optionally, the cylinder body (5) comprises at least one containment wall (36) and a bottom wall (30), which at least partially delimit the coupling seat (28), wherein the sensor housing (29) is positioned to be superimposed on the bottom wall (30), in the transverse direction with respect to the actuation axis (6), and wherein the insertion hole (14) is defined in the bottom wall (30), and wherein, optionally, the cylinder body (5) comprises two opposite containment walls (36), positioned along a direction parallel to the actuation axis (6), which delimit the extension of the coupling seat (28) in a direction parallel to the actuation axis (6), wherein the bottom wall (30) extends between the two opposite containment walls (36), and wherein, optionally, the bottom wall (30) comprises a relief (32), and wherein the insertion hole (14) is defined on the relief (32).

13. A feeling simulator device (2), in particular for a braking system (3) of the Brake-By- Wire type, comprising an anti-rotation system (1) according to any one of the preceding claims, wherein the braking feel simulator device (2) is connectable to a brake pedal or lever (4), in particular of the braking system (3), so that an actuation of the brake pedal or lever (4) corresponds to a translation of the piston body (8) within the cylinder body (5) of the antirotation system (1), along the actuation axis (6), wherein the braking feel simulator device (2) further comprises an absorber assemblyconfigured to apply a reaction force to the brake pedal or lever (4) in opposition to an actuation of the brake pedal or lever (4), wherein the absorber assembly is positioned to be housed inside the cylinder body (5), in the cylinder compartment (7), interposed between the cylinder body (5) and the piston body (8), and wherein, optionally, the absorber assembly comprises a plurality of elastic elements positioned in series and / or in parallel inside the cylinder body (5), which comprise compression coil springs positioned to be substantially coaxial to the actuation axis (6) and / or conical spring washers and / or square springs and / or torsional springs and / or strip springs and / or shaped springs, and wherein, optionally, the braking feel simulator device (2) is of the dry type.

14. A braking system (3), in particular of the Brake-By-Wire type, comprising a brake pedal or lever (4) operatively connected to the braking feel simulator device (2) according to claim 13, wherein the braking system (3) comprises at least one brake caliper, wherein the braking system (3) comprises an electronic processing unit configured to actuate the at least one brake caliper upon the detection, by a position sensor (21), of a movement of the piston body (8) with respect to the cylinder body (5), and wherein the braking system (3) can be integrated in motorcars or motorcycles having at least two wheels, for both the front and rear brakes, and in motor vehicles and heavy vehicles.

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