Brake pad carrier, configured for equipping a rail vehicle braking system which includes a brake linkage, rail vehicle braking system with such a brake pad carrier and rail vehicle

Description

Technical field of the invention

[0001] The invention relates to the field of railway vehicle braking. More particularly, it relates to a lining carrier configured to equip a railway braking system comprising a braking linkage.

[0002] The invention also relates to a braking system for a railway vehicle with brakes having at least one lining, provided with a brake linkage and at least one lining carrier, configured to act on braking components of the vehicle, such as for example brake discs, via the brake linkage and at least one lining carrier.

[0003] The invention also relates to a railway vehicle with brakes having at least one lining, comprising such a braking system configured to act on the braking components of the vehicle, such as for example the brake discs. State of the art

[0004] Railway vehicles with brakes having at least one lining are generally equipped with service and / or parking brake cylinder braking systems, comprising a piston that moves under the effect of a pressurized fluid, the movement of this piston actuating a brake linkage and resulting in a braking action such as the clamping of a brake disc by the lining(s) of this linkage.

[0005] Such a braking system is mounted on the railway vehicle to make contact with the brake discs or the wheels. Specifically, it can be mechanically attached to a bogie, to an axle fixed to the bogie, or to another device such as a drive motor or gearbox also mounted on the bogie.

[0006] The braking action generates braking forces on the brake linings, and therefore on the lining carriers and, more generally, on the rest of the system via the brake linkage. Because of these forces, which cause wear on the linings, it is necessary, firstly, to mechanically secure the linings to the carriers and, secondly, to provide a locking and unlocking mechanism for installing and removing the linings from the carriers.

[0007] In particular, the figures 1 to 4 Attached drawings show an example of such a braking system mounted on a railway vehicle.

[0008] There figure 1 This partially illustrates, in front view, this railway braking system equipped in particular with a brake linkage mounted on a brake disc of a railway vehicle, with the linings fixed to the lining holders of the system. On the figure 1, only one trim holder and one trim piece are visible.

[0009] There figure 2 shows the system alone, in perspective and with one trim piece fixedly mounted on a trim holder while the other trim piece is uninstalled from another trim holder using a tool.

[0010] There figure 3 is a partial, bottom view of the figure 2 showing a step in the unlocking action of the trim door to remove the trim still present.

[0011] There figure 4 is similar to the figure 3 showing a second stage of the unlocking action of the trim door, with the trim being uninstalled.

[0012] The railway braking system 1 illustrated on the figure 1 is here mounted on a brake disc 2 of a railway vehicle (not shown).

[0013] Brake disc 2 can be mounted on an axle of the railway vehicle, or directly on a wheel to be braked (not visible).

[0014] The railway braking system 1 comprises a body 3 forming a service brake cylinder supplied by a network of pneumatic pipes (not visible), and a brake linkage 4 mechanically connected to the body 3

[0015] The body 3 has the form of a generally closed envelope which is configured to be mechanically attached to a vehicle support, for example a portion of the bogie or axle, via a fastening interface 5.

[0016] When the service brake housed in the body 3 is activated, the brake linkage 4 is set in motion so as to act on the disc 2.

[0017] In particular, the brake linkage 4 is provided with a lining device 5 designed to apply forces to the brake disc 2 when the linkage 4 is actuated.

[0018] This device 5 here includes two trim holders 6 on each of which trims 7 are mechanically attached.

[0019] Each lining 7 is designed to be applied in contact with one face of the disc 2 to reduce its rotational speed and consequently that of the wheel to be braked.

[0020] The brake linkage 4 includes levers 8 which extend from the body 3 to the device 5 and to one end of which the lining holders 6 are mechanically attached.

[0021] The operation of the levers 8 can allow the lining holders 6 to be moved apart or closer together and in relation to the disc 2.

[0022] The system 1 includes force transmission links 10 mechanically secured by a first respective end to the fixing interface 5 (itself secured to the vehicle support, not shown) and by a second respective end opposite to the first end, to a respective trim carrier 6.

[0023] In particular, each trim holder 6 is provided with an attachment tab 11 to which a respective connecting rod 10 is mechanically attached, and an attachment area 12 to which a respective lever 8 is mechanically attached.

[0024] Such an arrangement is described in more detail, for example, in French patent FR 3 102 129. Document WO 2020 / 025306 A1 describes a system for facilitating the actuation of a release mechanism of a trim holder by means of a special lever-shaped tool.

[0025] The device 5, including the door fittings 6 and the fittings 7, have a general longitudinal orientation and a general transverse orientation.

[0026] The linings 7 are each provided with an attack face 13 configured to be in contact with the brake disc and a mounting face 14 on which is provided a fixing rib 15 which extends longitudinally and which here has a dovetail shape.

[0027] The trim holders 6 are each provided with a main plate 16 having an outer face 17 on which the attachment tab 11 and the attachment area 12 are formed, and an inner face 18 opposite the outer face 17 and on which a longitudinal groove 19 is formed (visible figures 3 and 4 ).

[0028] The longitudinal groove 19 has a complementary shape to the fixing rib 15 of a respective trim 7, and is configured to slidably receive this respective fixing rib 15 for the installation of the respective trim 7 on the respective trim holder 6.

[0029] The trim doors 6 are furthermore each provided with a window 20 made in the plate 16 and opening on both sides into the internal and external faces 18 and 17 and into the longitudinal groove 19 made in the internal face 18.

[0030] The trim holders 6 are further provided each with a first protrusion 21 and a second protrusion 22 projecting from the external face 17 of the plate 16 and arranged on either side of the window 20, according to the transverse direction of the respective trim holder 6.

[0031] In the illustrated example, the trim holders 6 are arranged so that the attachment area 12 is interposed between the attachment tab 11 and the first and second protrusions 21 and 22.

[0032] The first and second protuberances 21 and 22 each have a shape of fleshy parts.

[0033] The trim holders 6 are furthermore each provided with a locking and unlocking device 23 mounted articulated on the first protrusion 21 and extending in the transverse direction from the first protrusion 21 to the second protrusion 22.

[0034] The trim doors 6 are furthermore each provided with a safety device 24 formed here by a wire spring element, of the pin type, of which a first portion 25 is mechanically attached to the second protrusion 22, and a second portion 26 is mechanically attached to the locking and unlocking device 23.

[0035] In particular, the first portion 25 of the safety device 24 is inserted and fixed in the hinges formed by the second protrusion 22, while the second portion 26 is inserted and fixed in an orifice 27 provided in the locking and unlocking device 23.

[0036] The locking and unlocking member 23 has, at an end opposite to that by which it is articulated to the first protrusion 21, a hook-shaped finger 28 which defines a space 29 for the passage of the first portion 25 of the safety member 24 when the respective trim holder 6 is in a locked configuration (as on the Figures 1 And 3 ).

[0037] In such a locked configuration, a portion of the locking and unlocking member 23 passes through the window 20 and comes into tight contact with a portion of the fixing rib 15 of the respective trim 7, so as to hold the latter in position on the respective trim holder 6.

[0038] Furthermore, in such a locked configuration, the finger 28 of the locking and unlocking member 23 is inserted into the hinges formed by the second protrusion 22, with the first portion 25 of the safety member 24 being received in the space 29 defined by the finger 28.

[0039] In this locked configuration, the attachment points of the safety device 24 are such that this device is in a first stable position in which it forces the locking and unlocking device 23 against the respective trim 7.

[0040] The locking and unlocking member 23 and the safety member 24 together form the locking and unlocking mechanism for installing and uninstalling the trims on the trim doors.

[0041] To replace a trim piece 7, it is necessary to use a tool, for example a screwdriver, to move the respective trim holder 6 out of its locked position ( Figures 1 And 3 ) to an unlocked configuration ( figures 2 And 4 ).

[0042] In particular, a screwdriver 30 equipped with a shaft 31 is used. The shaft 31 of the screwdriver 30 is provided with an end 32 which is inserted between the first and second portions 25 and 26 of the safety member 24, outside the second protrusion 22, so as to bear on the first portion 25 and to exert pressure on the second portion 26 in order, on the one hand, to move the locking and unlocking member 23 away from the trim 7 and, on the other hand, to extract the finger 28 from the second protrusion 22.

[0043] Sufficient force must be exerted to move the second portion 25 of the safety device 24 sufficiently until it no longer exerts pressure on the locking and unlocking device 23 towards the trim 7.

[0044] THE figures 2 to 4show the general orientation of screwdriver 30 which must be positioned according to the transverse extension direction of the trim holder and the trim, almost completely offset from the latter, to move the trim holder from its locked configuration to its unlocked configuration.

[0045] In the unlocked configuration, the attachment points of the safety device 24 are such that this device is in a second stable position in which it remotely engages the locking and unlocking device 23 of the respective trim 7.

[0046] In other words, the trim 7 can thus be uninstalled from the respective trim holder 6 for its replacement.

[0047] Once the trim 7 has been replaced, the trim holder can be moved from its unlocked configuration to its locked configuration by pressing directly, with a tool, on the locking and unlocking mechanism 23 in the direction of the window 20. Description of the invention

[0048] The invention relates to a fitting carrier configured to equip a railway braking system comprising a braking linkage, of the type described above, and which is simple, convenient and economical.

[0049] The invention thus relates, in a first aspect, to a lining holder configured to equip a railway braking system for a railway vehicle and to act on at least one braking element of said railway vehicle, comprising a main plate having an external face and an internal face opposite to the external face, a mounting element provided on the internal face and configured to receive a complementary mounting element for a lining equipping the railway braking system, and a locking and unlocking mechanism configured to install / uninstall and lock / unlock the lining on the lining holder, the locking and unlocking mechanism comprising a locking and unlocking element mounted articulated vis-à-vis the main plate and extending in a transverse direction of the lining holder,and a safety device mechanically attached on one side to the main plate and on the other side to the locking and unlocking device, with the trim holder configured to admit a locked configuration in which the safety device forces the locking and unlocking device towards the main plate in a locked position where the locking and unlocking device is configured to be against the trim, and an unlocked configuration in which the safety device forces the locking and unlocking device to move away from the main plate in an unlocked position where the locking and unlocking device is configured to be away from the trim,the trim holder being characterized in that the locking and unlocking mechanism is provided with a gripping portion which extends projecting transversely beyond the main plate, and which is configured to move the locking and unlocking mechanism and the safety mechanism together to move the trim holder from one of its locked and unlocked configurations to the other, under the effect of an external force.

[0050] Thanks to the gripping portion of the trim holder according to the invention, it is particularly easy to move the trim holder from one of its locked and unlocked configurations to the other.

[0051] Due to the forces involved in the railway braking system, external stress can be applied by a user, using a tool, such as a screwdriver.

[0052] Furthermore, due to the presence of the gripping portion, it is more convenient to act directly on this gripping portion than on the safety device.

[0053] Moreover, the fact that the gripping portion extends in projection and transversely beyond the main plate of the trim holder makes it particularly convenient to operate, even with the tool in place.

[0054] It is indeed possible to position the tool along a main longitudinal direction of the main plate to access the gripping portion, thus requiring a reduced space around the trim holder.

[0055] Preferred, simple, convenient and economical features of the trim holder according to the invention are presented below.

[0056] The gripping portion can be formed by a manipulating element which has a locking face and an unlocking face opposite to the locking face.

[0057] The locking face and the unlocking face may have an overall curved shape, for example concave directed towards the manipulator, configured to facilitate the positioning of a tool.

[0058] The gripping portion can be formed by a manipulation tab having a through hole for the insertion of a tool.

[0059] The gripping portion can be formed by a manipulation rod fixed securely in a hole provided in the locking and unlocking mechanism, a manipulation rod against which a tool rests to move the trim holder from one of its locked and unlocked configurations to the other.

[0060] The packing holder may have a first protrusion and a second protrusion projecting from the external face, and the locking and unlocking member is mounted articulated on the first protrusion and extends in the transverse direction from the first protrusion to the second protrusion.

[0061] The trim holder may have a window in the main plate opening on both sides into the inner and outer faces and located opposite the mounting device.

[0062] The first protrusion and the second protrusion can be arranged on either side of the window, in a transverse direction of the trim holder.

[0063] The trim holder can be provided with a positioning stop which protrudes from the outer face of the main plate and which here extends at a distance from the second protrusion.

[0064] The positioning stop can be located substantially opposite the second protrusion and at least partially opposite the gripping portion.

[0065] The positioning stop has a shape that is substantially curved towards the second protrusion so as to form a housing configured to accommodate one end of a tool.

[0066] The packing holder may be provided with an obstacle wall which protrudes from the outer face of the main plate and extends in the immediate vicinity of the second protrusion.

[0067] The safety device can be formed by a wire spring element, of the pin type, a first portion of which is mechanically attached to the second protrusion and a second portion is mechanically attached to the locking and unlocking device.

[0068] The barrier wall may extend between the first portion of the safety device partially inserted into the second protrusion and the second portion of the safety device partially inserted into an opening in the locking and unlocking device, so that the barrier wall prevents access to a space between the first and second portions of the safety device.

[0069] The locking and unlocking device may have at an end opposite to that by which it is articulated to the main plate, a hook-shaped finger which defines a space for the passage of the first portion of the safety device when the trim holder is in its locked configuration.

[0070] The gripping portion can extend beyond the finger so that in the locked configuration of the trim holder, the gripping portion extends beyond the second protrusion and is easily accessible.

[0071] The mounting element is formed by a longitudinal groove, for example in the shape of a dovetail, formed in the inner face.

[0072] The invention also relates, in a second aspect, to a braking system for a railway vehicle with brakes having at least one lining, provided with a brake linkage and at least one lining holder as described above, the system being configured to act on braking components of the vehicle, such as for example brake discs, via the brake linkage and at least one lining holder on which at least one lining is installed and locked.

[0073] The invention also relates, in a third aspect, to a railway vehicle with brakes having at least one lining, comprising a braking system as described above, which is configured to act on the braking components of the vehicle, such as, for example, the brake discs. Brief description of the figures

[0074] We will now continue the exposition of the invention by describing examples of implementation, given below by way of illustration and not limitation, with reference to the attached drawings. There figure 1 The diagram described above partially illustrates, from a front view, this railway braking system, which includes a brake linkage mounted on a brake disc of a railway vehicle, with the brake linings, only one of which is visible, fixedly installed on the lining holders, only one of which is visible, of the system. figure 2The diagram described above shows the system alone, in perspective, with one trim piece fixedly mounted on a trim carrier and another trim piece removed from a different trim carrier using a tool. figure 3 The image described above is a partial, bottom view of the figure 2 showing a step in the unlocking action of the trim door to remove the remaining trim. figure 4 described above is similar to the figure 3 showing a second stage of the trim door unlocking action, with the trim being removed. figure 5 illustrates, in perspective and in isolation, a trim carrier configured to equip a system and designed to support a trim, as described with reference to figures 1 to 4 , according to one embodiment of the invention. The figure 6 is a view similar to that of the figure 5 showing the trim holder from a different angle. figure 7is a side view of the trim holder shown on the figures 5 and 6 , with a tool gripping the latter in the first unlocking position of the trim holder. The figure 8 is similar to the figure 7 but showing a view from below of the trim holder with the tool engaged in its first unlocked position. figure 9 is similar to the figure 8 , but with the trim holder in the unlocked configuration and the tool in a second unlocked position. Figure 10 illustrates in perspective the trim holder, in its unlocked configuration, and the tool as on the figure 8 in its second unlocked position. The figure 11 is similar to the Figure 10 except that the trim holder is in a locked configuration and the tool is engaged with it in a second trim holder locking position. figure 12illustrates, from below, a trim holder according to one variant embodiment. figure 13 is a view similar to that of the figure 12 showing another variant of the fitting holder. Detailed description

[0075] As explained above, the figures 1 to 4 illustrate a railway braking system of the prior art.

[0076] However, the following description of figures 5 to 13 aims at a fitting carrier which is configured to be mounted on a railway braking system as described above, in place of the fitting carrier described with reference to these figures.

[0077] A less detailed description, based on that given in the section reflecting prior art, will therefore be provided of such a railway braking system before describing in more detail the fitting carrier visible on the figures 5 to 13 .

[0078] In particular, it may be a railway braking system mounted on a brake disc of a railway vehicle.

[0079] The brake disc can be mounted on an axle of the railway vehicle, or directly on a wheel to be braked.

[0080] The railway braking system may include a body forming a service brake cylinder and / or a parking brake cylinder, supplied by a network of pneumatic pipe routing, and a brake linkage mechanically connected to the body.

[0081] The body can have the form of a generally closed envelope which is configured to be mechanically attached to a vehicle support, for example a portion of the bogie or axle, via a fastening interface.

[0082] When the service brake and / or parking brake is activated, the brake linkage is set in motion so as to act on the disc.

[0083] In particular, the brake linkage is equipped with a lining device designed to apply forces to the brake disc when the linkage is operated.

[0084] This device has two trim holders, on each of which trims are mechanically attached.

[0085] The device, including the door fittings and the fittings, has a general longitudinal orientation and a general transverse orientation.

[0086] Each lining is designed to be applied in contact with one face of the disc to reduce its rotational speed and consequently that of the wheel to be braked.

[0087] The brake linkage may include levers which extend from the body to the device and to one end of which the lining holders are mechanically attached.

[0088] Activating the levers can allow the lining holders to be moved closer together or further apart and closer to each other and to the disc.

[0089] The system may include force transmission links mechanically secured by a first respective end to the fixing interface (itself secured to the vehicle support) and by a second respective end opposite to the first end, to a respective trim carrier.

[0090] Each lining has an attack face configured to be in contact with the brake disc and a mounting face on which is formed a fixing rib which extends longitudinally and which may have a dovetail shape.

[0091] With reference to figures 5 to 11, the trim holder 106 according to the invention is now described, as well as the installation and removal, locking and unlocking, of the trim (not shown) on the trim holder 106.

[0092] In particular, the trim holder 106 is here provided with a main plate 116 having an external face 117 and an internal face 118 opposite the external face 117.

[0093] On the outer face 117 of the main plate 116 are provided an attachment tab 111 for the mechanical attachment of the connecting rod, an attachment area 112 for the mechanical attachment of the lever, and a mounting base 140, with the attachment area 112 which is interposed between the mounting base 140 and the attachment tab 111.

[0094] The trim carrier 106 has a mounting shaft 141 extending longitudinally in the attachment area 112, from the mounting base 140 to the attachment tab 112 where it is inserted into an opening provided in the attachment tab 112.

[0095] The mounting pin 141 is intended for the mechanical fastening of the lever.

[0096] The trim carrier 106 further includes a mounting element formed here by a longitudinal groove 119 formed in the inner face 118, for example in the shape of a dovetail, and complementary to a complementary mounting element formed for example by a trim fixing rib, and provided to receive by sliding this fixing rib for the installation of the trim on the trim carrier 106, on the side of its inner face 118.

[0097] The trim holder 116 is further provided with a window 120 formed in the main plate 116 and opening on both sides into the internal and external faces 118 and 117 and into the longitudinal groove 119 formed in the internal face 118.

[0098] The packing holder 116 is further provided with a first protrusion 121 and a second protrusion 122 projecting from the outer face 117 of the main plate 116.

[0099] The first protrusion 121 and the second protrusion 122 are here arranged on either side of the window 120, according to the transverse direction of the trim carrier 106.

[0100] The trim carrier 106 is arranged here so that the attachment area 112 and the mounting base 140 are interposed between the attachment tab 111 and the first and second protrusions 121 and 122.

[0101] The first and second protuberances 121 and 122 each have a shape of flesh, each having an upper flesh and a lower flesh at a distance from each other.

[0102] The trim holder 106 is further provided with a locking and unlocking device 123 mounted articulated on the first protrusion 121, between its upper and lower hinges, and extending in the transverse direction from the first protrusion 121 to the second protrusion 122.

[0103] The trim holder 106 is further provided with a safety device 124 formed here by a wire spring element, of the pin type, of which a first portion 125 is mechanically attached to the second protrusion 122 and a second portion 126 is mechanically attached to the locking and unlocking device 123.

[0104] In particular, the first portion 125 of the safety device 124 is introduced and fixed between the upper and lower hinges formed by the second protrusion 122, while the second portion 126 is introduced and fixed in an orifice 127 provided in the locking and unlocking device 123.

[0105] The safety device 124 here has a general U-shape, with the first and second portions 125 and 126 forming the arms of the U.

[0106] The locking and unlocking member 123 has, at an end opposite to that by which it is articulated to the first protrusion 121, a hook-shaped finger 128 which defines a space 129 for the passage of the first portion 125 of the safety member 124 when the trim holder 106 is in a locked configuration (as on the figures 5 to 8 And 11 ).

[0107] In such a locked configuration, a portion of the locking and unlocking member 123 passes through the window 120 and comes into tight contact with a portion of the trim fixing rib (not visible here), so as to hold the latter in position on the trim carrier 106.

[0108] Furthermore, in such a locked configuration, the finger 128 of the locking and unlocking member 123 is inserted into the upper and lower hinges formed by the second protrusion 122, with the first portion 125 of the safety member 124 being received in the space 129 defined by the finger 128.

[0109] In this locked configuration, the attachment points of the safety device 124 are such that this device is in a first stable position in which it forces the locking and unlocking device 123 against the trim (not visible).

[0110] The locking and unlocking member 123 is further provided with a handling member 150, or gripping portion, extending outward from the finger 128 so that in the locked configuration of the trim holder 106, the handling member 150 extends beyond the second protrusion 122 and is easily accessible.

[0111] The manipulator 150 has a locking face 151 and an unlocking face 152 opposite the locking face 151, each extending from the finger 128.

[0112] The locking and unlocking faces 151 and 152 here have an overall curved shape, rather concave directed towards the manipulation organ.

[0113] The packing carrier 106 is further provided, in the illustrated example, with a wall 160 forming an obstacle which protrudes from the external face 117 of the main plate 116 and which extends in the immediate vicinity of the second protrusion 122.

[0114] The trim carrier 106 is arranged so that the barrier wall 160 extends between the first portion 125 of the safety member 124 partially inserted into the second protrusion 122 and the second portion 126 of the safety member 124 partially inserted into the orifice 127 provided in the locking and unlocking member 123.

[0115] Thus, the wall 160, forming an obstacle, prevents access to a space provided between the first portion 125 and the second portion 126 of the safety device 124.

[0116] The trim holder 106 is further provided, in the illustrated example, with a positioning stop 170 which protrudes from the outer face 117 of the main plate 116 and which here extends at a distance from the second protrusion 122.

[0117] The trim holder 106 is arranged so that the positioning stop 170 is located here substantially opposite the second protrusion 122 and at least partially opposite the manipulation member 150.

[0118] The positioning stop 170 here has a shape substantially curved towards the second protrusion 122 so as to form a housing 171.

[0119] To replace a trim piece, it is necessary to use a tool, for example a screwdriver, to move the respective trim holder 106 out of its locked configuration ( figures 5 to 8 And 11 ) to an unlocked configuration ( figures 9 And 10 ).

[0120] In particular, a screwdriver 130 equipped with a shaft 131 is used here.

[0121] The shaft 131 of the screwdriver 130 has an end 132 which is here inserted into the housing 171 of the positioning stop 170, with the shaft 131 which is placed against the unlocking face 152 of the manipulator 150. The screwdriver 130 is then in a first unlocking position.

[0122] Sufficient force must be exerted to move the manipulator 150 sufficiently and thus cause the locking and unlocking member 123 and therefore the second portion 125 of the safety member 124 to move until the latter no longer forces the locking and unlocking member 123 towards the window 120 and therefore towards the trim (not visible), and the finger 128 is extracted from the second protrusion 122.

[0123] On the figure 8is represented the force F1 required to be exerted with the screwdriver 130 to move the locking and unlocking member 123 against the forces F2 and F3 exerted by the safety member 124.

[0124] Screwdriver 130 does not act directly on the safety component 124, thus avoiding any damage to the latter.

[0125] Moreover, in the illustrated example, it is not possible to act directly on the safety device 124 due to the presence of the wall 160 forming an obstacle which prevents the insertion of the rod 131 of screwdriver 130.

[0126] In addition, the positioning stop 170 can serve as an anti-slip device when operating the screwdriver 130, thus further securing the action of locking or unlocking the trim holder 106.

[0127] On the figure 9The screwdriver 130 is shown after actuation, in a second unlocked position. This demonstrates that a particularly small space E is required to move the trim holder 106 from its locked to its unlocked configuration.

[0128] In the unlocked configuration of the trim carrier 106, as seen on the figures 9 And 10 , the attachment points of the safety device 124 are such that this device is in a second stable position in which it engages the locking and unlocking device 123 at a distance from the window 120 and therefore from the trim (not visible).

[0129] In other words, the finger 128 is extracted from the second protrusion 122, the locking and unlocking member 123 no longer stresses the trim (not visible), which can thus be uninstalled from the trim holder 106 for replacement.

[0130] There figure 11illustrates the locking of the trim holder 106 after the trim has been replaced (not visible).

[0131] The 130 screwdriver therefore moves from a first locking position, not shown but identical to that of the Figure 10 except that the shaft 131 of the screwdriver 130 is supported against the locking face 151 of the manipulator 150 rather than against its unlocking face 152, in a second locking position visible on the figure 11 .

[0132] In other words, the aim here is to move the locking and unlocking member 123 and its second portion 125 in the opposite direction to that of the previous figures, in order to bring the locking and unlocking member 123 closer to the window 120 and therefore to the trim (not visible).

[0133] The trim carrier 106 shown on the figure 12 differs from the one illustrated on the figures 5 to 11in that it is provided with a locking and unlocking member 223 which has a manipulation lug 280, or gripping portion, having a through orifice 281 rather than the manipulation member described above.

[0134] In this variant, the screwdriver shaft is inserted into the through hole 281 rather than onto a locking / unlocking face.

[0135] The movement is similar enough to switch the trim holder from one configuration to another.

[0136] The trim carrier 106 shown on the figure 13 differs from the one illustrated on the figures 5 to 11 and the one illustrated on the figure 12 in that it is provided with a locking and unlocking member 323 which has a manipulator rod 390, or gripping portion, fixed securely in a hole 391 provided in the hook 328 rather than the manipulator member or manipulator lug described above.

[0137] In this variant, the screwdriver shaft rests against one side or the other of the 390 manipulation shaft to move the trim holder from one configuration to the other.

[0138] Variants not shown are described below.

[0139] The trim holder may be without a positioning stop and / or an obstacle-forming wall.

[0140] The trim holder may be without a mounting tab and / or mounting area and / or mounting base such as those described above.

[0141] The safety device has a general shape different from a U, for example an S. It may be a pin, or a cotter pin.

[0142] The first and second protuberances may not form ribs, but rather, for example, tabs on which the locking and unlocking mechanism would be fixed.

[0143] The trim can be fixed with a groove / rib mechanism other than a dovetail shape, for example with ribs / grooves having circular, rectangular or more generally ramped side faces.

[0144] More generally, the invention is not limited to the examples described and shown.

Claims

1. A brake shoe configured to equip a railway braking system for a railway vehicle and to act on at least one braking member of said railway vehicle, including a main plate (116) having an outer face (117) and an inner face (118) opposite to the outer face (117), a mounting member (119) provided on the inner face (118) and configured to receive a complementary member for mounting a lining equipping the railway braking system, and a locking and unlocking mechanism configured to install / remove and lock / unlock the lining onto / from the brake shoe (106), the locking and unlocking mechanism including a locking and unlocking member (123, 223, 323) hingedly mounted with respect to the main plate (116) and extending in a transverse direction of the brake shoe (106), and a safety member (124) mechanically fastened on the one hand to the main plate (116) and on the other hand to the locking and unlocking member (123, 223, 323), with the brake shoe configured to assume a locked configuration in which the safety member (124) stresses the locking and unlocking member (123, 223, 323) towards the main plate (116) into a locking position where the locking and unlocking member (123, 223, 323) is configured to be in abutment against the lining, and an unlocked configuration in which the safety member (124) stresses the locking and unlocking member (123, 223, 323) to place it at a distance from the main plate (116) into an unlocked position where the locking and unlocking member (123, 223, 323) is configured to be at a distance from the lining, the brake shoe (106) being characterised in that the locking and unlocking member (123) is provided with a gripping portion (150, 280, 390) which projects transversely beyond the main plate (116), and which is configured to move the locking and unlocking member (123, 223, 323) and the safety member (124) together in order to switch the brake shoe (106) from one of its locked and unlocked configurations to the other, when subjected to an external stress.

2. The brake shoe according to claim 1, characterised in that the gripping portion is formed by a handling member (150) which has a locking face (151) and an unlocking face (152) opposite to the locking face (151).

3. The brake shoe according to claim 2, characterised in that the locking face (151) and the unlocking face (152) have an overall curved shape, for example concave directed towards the handling member (150), configured to facilitate the positioning of a tool.

4. The brake shoe according to claim 1, characterised in that the gripping portion is formed by a handling lug (280) having a through port (281) for introducing a tool.

5. The brake shoe according to claim 1, characterised in that the gripping portion is formed by a handling rod (390) fixed integrally in a hole provided in the locking and unlocking member (323), against which handling rod (390) a tool comes in abutment in order to switch the brake shoe from one of its locked and unlocked configurations to the other.

6. The brake shoe according to any of claims 1 to 5, characterised in that it includes a first protrusion (121) and a second protrusion (122) provided projecting from the outer face (117), and the locking and unlocking member (123) is hingedly mounted to the first protrusion (121) and extends along the transverse direction from the first protrusion (121) to the second protrusion (122).

7. The brake shoe according to any of claims 1 to 6, characterised in that it includes a window (120) provided in the main plate (116) and opening on either side into the inner face (118) and into the outer face (117) and located facing the mounting member (119).

8. The brake shoe according to claims 6 and 7, characterised in that the first protrusion (121) and the second protrusion (122) are disposed on either side of the window (120), in a transverse direction of the brake shoe (106).

9. The brake shoe according to any of claims 6 to 8, characterised in that it is provided with a positioning stop (170) which projects from the outer face (117) of the main plate (116) and which here extends at a distance from the second protrusion (122).

10. The brake shoe according to claim 9, characterised in that the positioning stop (170) is substantially facing the second protrusion (122) and at least partially opposite the gripping portion (150, 280, 390).

11. The brake shoe according to one of claims 9 and 10, characterised in that the positioning stop (170) has a shape substantially curved towards the second protrusion (122) so as to form a housing (171) configured to accommodate one end of a tool.

12. The brake shoe according to any of claims 6 to 11, characterised in that it is provided with an obstacle-forming wall (160) which projects from the outer face (117) of the main plate (116) and which extends in the immediate proximity of the second protrusion (122).

13. The brake shoe according to any of claims 6 to 12, characterised in that the safety member (124) is formed by a wire spring element, of the hairpin type, a first portion (125) of which is mechanically fastened to the second protrusion (122) and a second portion (126) of which is mechanically fastened to the locking and unlocking member (123).

14. The brake shoe according to claims 12 and 13, characterised in that the obstacle-forming wall (160) extends between the first portion (125) of the safety member (124) partially introduced into the second protrusion (122) and the second portion (126) of the safety member (124) partially introduced into a port (127) provided in the locking and unlocking member (123), so that the obstacle-forming wall (160) prevents access to a space provided between the first portion (125) and the second portion (126) of the safety member (124).

15. The brake shoe according to any of claims 13 and 14, characterised in that the locking and unlocking member (123) has, at an end opposite to that by which it is hinged to the main plate (116), a hook-shaped finger (128) which defines a space (129) for passing the first portion (125) of the safety member (124) when the brake shoe (106) is in its locked configuration.

16. The brake shoe according to claim 15, characterised in that the gripping portion (150, 280, 390) extends projecting from the finger (128) so that, in the locked configuration of the brake shoe (106), the gripping portion (150, 280, 390) extends beyond the second protrusion (122) and is easily accessible.

17. The brake shoe according to any of claims 1 to 16, characterised in that the mounting member (119) is formed by a longitudinal groove, for example having a dovetail shape, formed in the inner face (118).

18. A braking system for a railway vehicle having brakes with at least one lining, provided with a brake linkage and at least one brake shoe (106) according to any of claims 1 to 17, the system being configured to act on braking members of the vehicle, such as for example brake discs, via the brake linkage and the at least one brake shoe (106) onto which at least one lining is installed and locked.

19. A railway vehicle having brakes with at least one lining, including a braking system according to claim 18 and which is configured to act on the braking members of the vehicle, such as, for example, the brake discs.