Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
  • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
  • F16D65/095—Pivots or supporting members therefor
  • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
  • F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
  • F16D65/0974—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
  • F16D65/0977—Springs made from sheet metal

Definitions

• the object of the present invention is a spring for a brake caliper of a disc brake and a brake caliper provided with such spring.
• Brake calipers of the known type when of the fixed type, comprise a brake caliper provided with a first half body, or half portion of the caliper body, suitable for seating first means for generating a braking action, arranged facing a first braking surface of an outer side of a brake disc, as well as a second half body, or half portion of the caliper body, suitable for seating second means for generating the braking action, arranged facing a second braking surface of an inner side of the disc.
• the first and the second half body are connected to two side bridge elements arranged at the circumferential ends of the half bodies for connecting said half bodies and arranged astride of the disc.
• the term “outer side” means the side of the disc brake that faces outwards of the vehicle when it is mounted to the hub and to the axle, or hub holder, of the wheel.
• the term “inner side” means the side of the disc brake that faces inwards of the vehicle when mounted to the wheel hub.
• axial direction it is meant a direction parallel to the rotation axis of the disc
• radial direction it is meant a direction orthogonal to the rotation axis of the disc and passing by the rotation axis
• tangential direction it is meant a third direction parallel to the rotation plane of the disc and orthogonal to the other two directions.
• the caliper body subjects the disc to a tightening action generating a braking action, produced by the braking means, for example cylinder and piston units, seated in the caliper half bodies, the pistons whereof act through pads on the opposite disc braking surfaces.
• the braking means for example cylinder and piston units
• the pad tightening action against the disc braking surfaces is directed axially and is balanced by the caliper body structure that is placed astride of the disc.
• the caliper bodies are often provided with an additional central bridge element that connects the two half bodies, also arranged astride of the disc.
• Such additional bridge element is usually provided with a spring that elastically preloads the pads, stressing them in the direction opposite the direction of approach to the disc.
• Such springs include a central hooking portion, two side beams that develop in a tangential direction astride of the disc at the ends whereof there are provided as many cross members, each of which concurrently stresses both pads on the two sides of the disc.
• the braking action is directed tangentially, and in particular in the direction of rotation of the disc. This action stresses the bridge elements also deforming portions thereof required for connecting the half bodies. Moreover, the braking action is relieved on the support means only on the caliper body side facing the inner side of the disc, also causing a bending of the caliper body around radial axes.
• brake calipers In order to stiffen the caliper body and thus limit the above phenomenon, brake calipers have been proposed wherein the caliper body exhibits a tangential stiffening cross member, that is, which connects the two side bridge elements developing astride of the disc, substantially following the edge pattern by a portion.
• a brake caliper for a disc brake comprises a caliper body having a first half-portion and a second half-portion spaced-apart , which define a disc space to receive a portion of a brake disc, said half-portions defining a first and a second pad seat, respectively, suitable to receive a first and a second pad intended to engage the brake disc on two opposite sides.
• said caliper body comprises a cross member arranged on the disc space which develops in tangential direction, for example but not necessarily, avoiding connections with the half-portions in the tangential crossing portion thereof of the disc space.
• a suitable spring is associated to the cross member of said brake caliper and said spring comprises :
• first and second reactioji beams being configured so that, when the spring is connected to the caliper body, they are oriented transversally to said cross member and are suitable to exert an elastic pre-load on said first and second pads, which pre-load is suitable to oppose the approaching movement of the pads to the brake disc.
• said first and second reaction beams being shaped so that when the spring is connected to the caliper body, they are suitable for exerting an elastic preload respectively on said first and said second pad suitable for opposing the pads tangentially against the respective pad seats provided on the caliper body.
• said first and second reaction beams are configured so that they elastically deform, thereby increasing said pre-load intensity, following the approaching of said first and second pads to the brake disc.
• said first and second reaction beams form angles ( ⁇ ) that are different from 90° with a plane parallel to the mean plane of the disc (P) when the spring is connected to the caliper body.
• said first and second reaction beams are configured so that when the spring is connected to the caliper body, said elastic pre-load thereof comprises a first component that is parallel to the movement direction of and facing the corresponding pad, and a second component that is orthogonal to the first component facing the disc space.
• said first and second reaction beams are suitable to engage the upper edges of a plate of said first and second pads, respectively.
• said coupling portion, said first reaction beam and said second reaction beam are made of a single plate-like piece.
• said coupling portion comprises a central beam, a first connecting beam and a second connecting beam defining a cross member seat that is suitable to receive said caliper body cross member.
• said central beam, first connecting beam and second connecting beam are elastically deformable so as to define a cross member seat, which is configurable at least according to a connection configuration, in which the central beam, the first connecting beam, and the second connecting beam are suitable to partially wrap the cross member, and an assembling position, in which the cross member seat has a longer extension than the extension that it has in the connection configuration, so as to allow the introduction of the cross member into the cross member seat.
• the spring coupling portion includes a first and a second locking beams, projecting inwardly of said cross member seat, said first and second locking beams being coupled to the coupling portion so that, in said connection configuration, the ends thereof are at a distance which is lower than the width of the caliper body cross member lower side, so as to be suitable to arrange in a service position at least partially beneath the cross member lower side.
• a first and a second locking beams are provided for, which are projecting inwardly of said cross member seat, and wherein, in an assembling configuration of the spring on the cross member, the ends of said first and second locking beams are at a distance which is higher than or equal to the width of the caliper body cross member lower side.
• said first and second locking beams are so oriented as to identify corresponding extending lines that meet within said cross member seat.
• a first reaction beam is connected to said first connecting beam, and a second reaction beam is connected to said second connecting beam.
• said first reaction beam and said first connecting beam, and said second reaction beam and said second connecting beam form acute angles therebetween, respectively, when the spring is connected to the caliper body.
• said central beam and/or said first connecting beam and/or said second connecting beam comprise a hole or slot, for example, which is suitable to the introduction of a tool for the uncoupling of the spring from the caliper body cross member.
• said spring is provided with notches for relieving the strains or stresses within the spring body.
• the spring body is provided with notches with rounded ends, preferably arranged in the jointing portions where the spring portions change direction or where the most elastically stressed portions are provided, such as for example the first and the second reaction beam.
• the connecting portion of said first and second reaction beam to the first and second connecting beam is provided with a first and a second opening suitable for allowing a greater elastic deformation of the connecting beam portion that supports the first and the second reaction beam.
• a brake caliper for disc brake comprises:
• caliper body comprising a first and a second mutually spaced-apart half-portions, which define a disc space to receive a portion of a brake disc, said half- portions defining a first and a second pad seats, respectively, that are suitable to receive a first and a second pads Intended to engage the brake disc on two opposite sides, said caliper body further comprising a cross member arranged on the disc space extending in the tangential direction;
• At least one spring connected or connectable to said cross beam of the caliper body and suitable for moving apart the pads from each other, and according to an embodiment, suitable for opposing the pads tangentially against the respective pad seats provided in the caliper body.
• said caliper body is made in a single piece.
• figure 1 shows a perspective view of a caliper for disc brake
• figure 2 shows a perspective exploded view of the caliper of figure 1 wherein the pads, the pad support pins and the pad spring are shown in an exploded view in mounting position;
• figure 3 shows a perspective view of a pad spring according to a first embodiment
• figure 4 shows a perspective view of a pad spring according to a. second embodiment
• figure 5 shows a perspective view of a pad spring according to a third embodiment
• figure 6 shows a perspective view of a pad spring according to a fourth embodiment
• figure 7 shows a cross section view parallel to the axial direction passing by the centre line of the pad spring of the caliper of figure 1.
• reference numeral 1 globally denotes a brake caliper of a disc brake, in particular a brake caliper of the fixed caliper type.
• Such caliper 1 comprises a caliper body, globally indicated with 2.
• the caliper body 2 is made in a single piece.
• Caliper 1 may be fixed by fixing means, for examples screws or bolts, to a vehicle suspension, whereas a brake disc of the disc brake having an annular braking band is connectable to the vehicle wheel hub.
• the brake disc defines a plane P of the brake disc.
• Caliper 1 comprises two half bodies or half portions 3 and 4, respectively a first half portion 3 on the suspension side, wherein there are formed the fixing means, and a second half portion 4 on the wheel side.
• Such half portions 3 and 4 are arranged spaced apart so as to delimit a disc space 5 suitable for receiving a portion of the brake disc and connected to one another by a connecting .structure 51 that extends astride of the disc space 5.
• such connecting structure 51 comprises two end bridges 6 and 7 that delimit a central opening 8.
• At least one, preferably two pads 10' and 10' ' that comprise a plate 11, for example of steel, carrying a coating of friction material 12, may each be arranged on a side of the brake disc at the braking band thereof and received into seats 13' and 13' ' respectively delimited by half portions 3 and 4.
• pads 10' and 10'' are supported by two support pins 14 that have sufficient dimensions and mechanical resistance to allow pads 10' and 10' ' to be supported and guided by such support pins 14 for example by a hole or slot formed in plate 11 at a radially outer or top edge thereof 16 in order to prevent radial movements of pads 10' and 10' ' .
• Pads 10' and 10'' movable in a direction perpendicular to a mean plane P of a brake disc 15, may be actuated by thrust means 17, such as for example one or more hydraulic cylinder-piston units arranged in half portions 3 and 4 of caliper 1, so as to tighten, through the friction coating 12, a sector of the braking band of the brake disc.
• thrust means 17 such as for example one or more hydraulic cylinder-piston units arranged in half portions 3 and 4 of caliper 1, so as to tighten, through the friction coating 12, a sector of the braking band of the brake disc.
• the caliper body 2 further comprises a cross member 9, preferably arranged at such central opening 8, which develops in tangential or circumferential direction, in particular that connects the two end bridges 6 and 7.
• a cross member 9 projects from one end bridge 6 to the other 7, avoiding to connect to structural elements made thereby integral with half portions 3 and 4, splitting the central opening into two openings 8' and 8'' extended substantially in tangential or circumferential direction.
• openings 8' and 8'' are suitable for the introduction and the exit of pads 10' and 10' ' from the respective seats 13' and 13'' thereof or pockets formed in half portions 3 and 4.
• cross member 9 is arranged about in the middle of the central opening 8, so as to split it into two half openings 8' and 8'' with substantially the same extension. Even more preferably, cross member 9 connects the centre line of the first end bridge 6 to the centre line of the second end bridge 7. The central position of cross member 9 ensures free access to the disc space 5 and thus to pads 10' and 10' ' for their maintenance and/or replacement.
• the caliper body 2 is especially sturdy, and therefore resistant to the stresses generated by the tightening action and by the braking action. Moreover, the caliper body structure is especially stiff.
• the brake caliper 1 according to the present invention is particularly advantageous when applied to high performance cars wherein the braking action may cause higher stresses on the bridge elements.
• the caliper body 2 preferably is a single block, that is, made in a single piece. As an alternative, it is possible to make the caliper body 2 in multiple parts.
• the first half portion 3 and the second half portion 4 may form two half parts or half bodies that are separate and connectable to one another.
• the caliper body may advantageously be connected to a spring 18 suitable for exerting an elastic preload on pads 10' and 10'' so as to stress the pads away from the brake disc, so that they tend to partially return into seats 13' and 13' ' at the end of the braking avoiding to create a braking action or residual braking torque on the disc also when the braking system is deactivated.
• the caliper body may advantageously be connected to a spring 18 suitable for exerting a further elastic preload on pads 10' and 10' ' so as to prevent pads 10' and 10'' from moving freely into seats 13' and 13'' when the vehicle is running with deactivated brake.
• the caliper body may be connected to a spring 18 suitable for exerting an elastic preload on pads 10' and 10'' for opposing or stopping them into seats 13' and 13'' also when the brake is deactivated and thus reduce the onset of brake vibrations and noise due to movements of pads 10' and 10' ' .
• such elastic preload action on pads 10' and 10' ' so as to stress the pads away from the brake disc and such further elastic preload on pads 10' and 10' ' , in order to prevent pads 10' and 10' ' from moving freely into seats 13' and 13' are exerted by the same spring 18.
• spring 18 comprises a coupling portion 19 suitable for making a snap-wise connection 100, preferably reversible, with cross member 9 of the caliper body.
• the coupling portion 19 comprises a central portion or beam 20 as well as a first 21 and a second 22 connecting portion or beam, preferably arranged at the two sides of the central beam 20.
• the central beam 20 and the connecting beams 21 and 22 delimit a cross member seat 23 suitable for receiving cross member 9 therein.
• such beams that form the coupling portion 19 are shaped so as to partially surround cross member 9 once it has been coupled.
• the central beam 20 is intended for being positioned on the top side of cross member 9 (that is, the side opposite the side facing the disc space 5)
• the first connecting beam 21 is intended for being positioned on the side of cross member 9 facing the first half portion 3 of the caliper body 2
• the second connecting beam 22 is intended for being positioned on the side of cross member 9 facing the second half portion 4 of the caliper body 2.
• the central beam 20, the first connecting beam 21 and the second connecting beam 22 are elastically deformable.
• their deformations correspond to variations in the extension of the cross member seat 23.
• the cross member seat 23 may be configured, by the effect of the above deformations, at least according to a connecting configuration and a mounting configuration.
• the connecting configuration is suitable for keeping the connection between spring 18 and cross member 9.
• the central beam 20, the first connecting beam 21 and the second connecting beam 22 partially surround the cross member 9 according to the ways described above.
• the central beam 20 and the connecting beams 21 and 22 take on such deformation states that the cross member seat 23 exhibits a greater extension than the extension it has in the connecting configuration.
• the connecting beams 21 and 22 in non-deformed conditions of spring 18, form angles ⁇ of about 90° (or .larger) with the central beam 20.
• ⁇ angle
• the extension of the cross member seat 23 widens and it is possible to insert cross member 9 therein.
• the coupling portion 19 is elastically loaded.
• connecting beams 21 and 22 When the connecting beams 21 and 22 are released, by the effect of the elastic recovery, they approach each other again, thus surrounding cross member 9 and thus returning the cross member seat 23 back to the extension of the connecting configuration.
• cross member 9 coupled or pinched by spring 18, there may optionally be a residual elastic preload in the coupling portion, so as to make the coupling with cross member 9 steadier.
• the connecting beams 21 and 22 and the central beam 20 exert an elastic tightening action that surrounds cross member 9 on three sides and clamps the cross member between the branches of the two opposite connecting beams 21 and 22.
• the coupling portion 19 further includes a first 24 and a second 25 locking portion or beam protruding within the cross member seat . 23.
• they are associated respectively to the first 21 and to the second 22 connecting beam and even more preferably, in the connecting configuration they are oriented so as to define respective development lines Sl and S2 that meet inside the cross member seat.
• development lines Sl and S2 form an angle ⁇ greater than 90°.
• the first 24 and the second 25 locking beams are shaped so that in the connecting configuration, the respective ends thereof are at a shorter distance D than the width of the lower side of cross member 9 of the caliper body 2.
• the locking beams 24 and 25 in assembled conditions, press onto the lower side of cross member 9, thus ensuring the connection stability of spring 18, while preventing the extraction of the latter.
• distance D between the ends of the first and of the second locking beams is greater than or equal to the width of the larger side of cross member 9 of the caliper body 2, so that cross member 9 may be inserted into the crops member seat without making spring 18 substantially interfere with the latter.
• Such condition may again be obtained by stressing the first 21 and the second 22 connecting beams apart, whereto the first 24 and the second 25 locking beam are preferably associated.
• the connecting beams 21 and 22 exhibit a wavy shape, about in the shape of a sinusoid or W.
• they exhibit a first and a second concavity 29 and 30 at the two ends and a convex portion 31 between the two concavities 29 and 30.
• the first concavity 29 and the convex portion 31 are connected to one another by a first connecting portion 32 substantially rectilinear
• the second concavity 30 and the convex portion 31 are connected to one another by a second connecting portion 33 substantially rectilinear.
• the first 21 and the second 22 are connected to the central beam 20 at the respective first concavities 29.
• the locking beams 24 and 25 develop starting from the first concavity 29 respectively of the first 21 and of the second 22 connecting beam and constitute an extension of the first rectilinear connecting portions 32.
• the locking beams 24 and 25 are associated to the coupling portion 19 at the second concavities 30.
• spring 18 exhibits, next to the central beam 20 the first 21 and the second 22 connecting beam suitable for elastically and pressure- wise surrounding cross member 9.
• Said first 21 and second 22 connecting beams exhibit each a bend 101' and 101'' suitable for arranging underneath cross member 9 so as to clamp at least one portion, preferably two, of cross member 9 between said bend 101' and 101'' and said central beam 9.
• this bend 101' and 101" of the connecting beams 21 and 22 exhibit rounded ends 102' and 102'' that facilitate the spreading of the connecting beams 21 and 22 when spring 18 is fitted onto cross member 9, to then close snap-wise underneath the cross member when the spring is totally fitted for tightening pressure-wise the cross member between the connecting beams 21 and 22 and between the central beam and the bends.
• these bends are a U bend of the connecting beams 21 and 22, which for example extends by the full width of spring 18 to then form the reaction beams or arms 26 and 27 suitable for exerting a removal action of the pads from the disc, acting on the edge of the plate thereof and advantageously, the action of tangential abutment of the pads against an abutment surface provided in the respective pad seat obtained in half portions 3 and 4 in tangential direction ( Figure 5) .
• spring 18 exhibits next to the central beam 20 the first 21 and the second 22 connecting beams suitable for elastically and pressure- wise surrounding cross member 9.
• Said first 21 and second 22 connecting beam exhibit each a portion 103' and 103' ' thereof which is farther from the central beam 20 which moves away from the cross member to approach the respective pad 10' and 10", preferably forming an angle smaller than 90° relative to the place whereon the prevailing flat portion of the first 21 or second 22 connecting beam lies ( Figure 6) .
• the reaction beams or arms 26 and 27 project, suitable for exerting an action of removal of the pads from the disc, acting on the edge of plate 11 thereof and advantageously, the action of tangential abutment of pads 10' and 10" against an abutment surface provided into the respective pad seat obtained in the half portions 3 and 4 in tangential direction .
• said central beam 20 exhibits an opening or hole 28 for lightening and/or inserting a tool suitable for removing the spring from the cross member.
• said first 21 and second 22 connecting beams exhibit a portion, preferably a central portion 104' and 104" that projects from the initial portion of the first 21 and second 22 connecting beam suitable for elastically and pressure-wise surrounding cross member 9, remaining parallel thereto for continuing to surround cross member 9 and extending by at least an end portion 105' and 105" beyond it.
• a first 24 and a second 25 locking beam separates cantilevered, suitable for arranging below cross member 9 so as to elastically and pressure-wise act on the lower surface of cross member 9 for tightening, along with the central beam 20, cross member 9.
• said first 24 and second 25 locking beam form shelves that project, forming undercut coupling elements of cross member 9.
• the central portions 104' and 104" projecting from the first 21 and second 22 connecting beam are arranged substantially parallel to one another and free to move apart when elastically influenced by cross member 9 that is fitted by spring 18.
• the first 21 and second 22 connecting beam exhibit a portion 106' and 106" wherein they move close to each other forming a clip element that when fitted to cross member 9 clamps pressure-wise the opposite sides of cross member 9 that are in contact with these portions 106' and 106" of the first 21 and second 22 connecting beam. Said first 21 and second 22 connecting beam continue beyond said portions 106' and 106" moving away therefrom.
• the coupling portion of the first 21 and second 22 connecting beam with the first 26 and second 27 reaction beam exhibits a connecting portion 107' and 107" that projects away from the central beam 20 substantially arranging parallel to each other, so as to arrange the first 26 and second 27 reaction beam that project from the first 21 and second 22 connecting beams rising and forming a reaction angle with the associable plate 11 of pad 10' and 10" that stresses pads 10' and 10" away from each other and thus from the disc that can be clamped thereinbetween.
• spring 18 comprises a first reaction beam 26 and a second reaction beam 27.
• first 26 and second 27 reaction beam develop starting from the coupling portion 19, in particular on two opposite sides thereof, and are oriented relative thereto so that when spring 18 is connected to the caliper body 2 at cross member 9, they are oriented crosswise the cross member itself.
• the cross member seat 23 of the coupling portion 19 develops according to a development direction T that is oriented tangentially when spring 18 is connected to cross member 9.
• the reaction beams 26 and 27 are crosswise, preferably orthogonal, to both the development direction of the cross member seat 23, and to the same crosa member.
• first 26 and the second 27 reaction beam are suitable for exerting respectively on the first 10' and on the second 10'' pad elastic preloads suitable for opposing the approach movement of the same pads towards the disc for obtaining the engagement and thus the tightening of the latter.
• first 26 and the second 27 reaction beams are configured so that they elastically deform, thereby increasing said pre-load intensity, as the first 10' and the second 10" pad approach the brake disc.
• the first 26 and the second 27 reaction beam are respectively connected to the first 21 and the second 22 connecting beam of the coupling portion 19, preferably forming a single plate- shaped piece with the latter.
• the first 26 and the second 27 reaction beam develop in particular starting from the second concavities 30 respectively of the first 21 and of the second 22 connecting beam of the coupling portion 19.
• the respective connections of the first reaction beam 26 with the first connecting beam 21 and of the second reaction beam 27 with the second connecting beam 22 are such that the respective pairs of beams indicated above respectively form acute angles Y when spring 18 is connected to the caliper body and presses onto pads 10' and 10'' seated in their seats 13' and 13' ' (that is, with no braking) .
• the first 26 and the second 27 reaction beam form angles ⁇ differing from 90° with the plane of disc P when spring 18 is connected to cross member 9 of the caliper body 2.
• first 26 and the second 27 reaction beam have lengths suitable for engaging the top edge 16 of plates 11 of the respective pads 10' and 10' ' .
• first reaction beam 26 engages the top edge 16 of plate 11 of the first pad 10'
• second reaction beam 27 engages the top edge 16 of plate 11 of the second pad 10' ' .
• the elastic force exerted by spring 18 on the respective pads 10' and 10'' may therefore be divided into two different components.
• a first component Fl is parallel to the moving direction of the pads (that slide along the support pins 14) and has a direction opposite their moving direction during the braking. In other words, the first component tends to oppose the braking force exerted by the pistons on the pads.
• a second component F2 is orthogonal to the first Fl and faces the disc space 5. Such second component F2 therefore stresses pads 10' and 10'' against the support pins 14. It is therefore clear that starting from the stand-by condition, that is, without braking, wherein spring 18 preferably already exerts an elastic preload on the pads, both its components grow by intensity as the pads move close to the brake disc. In fact, subsequent to the movement of the pads, angles ⁇ and Y decrease and thus spring 18 becomes further elastically loaded.
• spring 18 comprises means for the release thereof from cross member 9 of the caliper body 2.
• such release means comprise holes and/or slits 28 variedly arranged into spring 18.
• a hole or slit may be provided on the central beam 20 of the coupling portion 19.
• a hole or slit 28 may be provided in one between the first 21 and the second 22 connecting beam of the coupling portion 19, or in both.
• Such holes or slits 28 may be used for inserting a removal tool, for example a screwdriver or the like, for exerting suitable forces on spring 18 for increasing the extension of the cross member seat 23 and thus allow the release of spring 18 from cross member 9.
• the spring and the brake caliper according to the invention allow solving the problem mentioned in the introductory part of the present description.
• a man skilled in the art may make several changes and adjustments to the spring and brake caliper described above in order to meet specific and incidental needs, without departing from the following claims.
• said spring 18 is provided with notches 110 for relieving the strains or stresses within the spring body.
• the spring body is provided with notches with rounded ends 110, preferably arranged in the jointing portions, for example the portion that forms said first concavity 29, where the spring portions change direction or where the most elastically stressed portions are provided, such as for example where the first 24 and the second 25 reaction beam connect to spring 18.
• the connecting portion of said first 24 and second 25 reaction beam to the first 21 and second 22 connecting beam is provided with a first and a second opening 111 suitable for allowing a greater elastic deformation of the connecting beam portion that supports the first and the second reaction beam.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Braking Arrangements (AREA)

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Cited By (5)

Citations (6)

• 2009
  • 2009-08-13 IT ITMI2009A001478A patent/IT1395169B1/it active
• 2010
  • 2010-08-11 WO PCT/IT2010/000367 patent/WO2011018815A1/en active Application Filing

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