TOOL FOR OPERATING A LOCKING LOCK THAT LOCKS A BRAKE PAD TO A PAD HOLDER

Description

[0001] The invention relates to a tool for releasing and locking a locking latch of a brake pad holder, with which a brake pad can be locked to a pad holder.

[0002] Brake pads for disc brakes on rail vehicles are usually held in a guide channel of a pad holder by means of a guide web provided on the back of the brake pad, which extends in the longitudinal direction of the pad holder.

[0003] This guide channel is provided with an undercut in cross-section, particularly a dovetail shape, into which the adapted guide web is located. In the functional position, a locking latch is pivotably mounted on the pad holder to lock the brake pad in the longitudinal direction of the pad holder. In a locked position, the locking latch protrudes into this guide channel and, in a released position, is removed from the guide channel. This allows for easy handling when changing the brake pad.

[0004] A generic brake pad holder is known, for example, from DE 10 2009 006 290 A1.

[0005] To secure the locking bar in its locked position, a bracket is used. This bracket is coupled to the bracket at one end remote from the locking bar's pivot axis. The bracket is designed as a spring clip on the pad holder and on the locking bar, and is preloaded to press the locking bar into the locked position.

[0006] In order to change the brake pads, a camshaft with an eccentric held on it in a twist-proof manner must push away a nose of the locking latch and thus pivot the locking latch into the release position.

[0007] Alternatively, the bracket can be tilted from the outside using a tool so that the locking latch is pushed into the release position. This type of brake pad holder has proven itself effective in practice.

[0008] Another brake pad holder of this type is known from JP 2008 002573 A. With this brake pad holder, a tool in the form of a simple rod can be inserted through a hole in a web protruding from the pad holder into a tool holder provided for this purpose in the locking latch, so that a lever or tilting movement of the rod resting on an inner edge of the hole moves the locking latch from the locked position to the release position. Intentional or unintentional removal of the rod from the tool holder of the locking latch is possible at any time. Further technological background information is provided in DE 28 41 139 A1, US 3 851 738 A, JP 5 247332 B2, EP 2 587 086 A1 and JP 2011 236924 A.

[0009] The object of the present invention is to further develop a tool for releasing and locking a locking latch of a brake pad holder in such a way that the releasing and locking can be carried out even more easily and safely.

[0010] Another object of the present invention is to further develop a brake pad holder for a rail vehicle and a tool for pivoting a locking latch so that the brake pad change can be carried out in an even simpler and safer manner.

[0011] The first object is achieved by a tool for releasing and locking a locking latch of a brake pad holder having the features of claim 1.

[0012] The second object is achieved by a brake pad holder for a rail vehicle and a tool for pivoting a locking bolt with the features of claim 4.

[0013] In the brake pad holder and tool combination according to the invention, the brake pad holder for a rail vehicle comprises a pad holder and a brake pad held in place by a locking mechanism. The pad holder has a guide channel extending in the longitudinal direction of the pad holder, in which the brake pad is slidably held.

[0014] To lock the brake pad in the longitudinal direction of the pad holder, a locking latch is pivotably mounted on the pad holder, which protrudes into the guide channel in a locking position that fixes the brake pad in a functional position and is removed from the guide channel in a release position.

[0015] At one end of the locking bolt remote from a pivot axis of the locking bolt, a bracket is arranged which is pivotally mounted on the pad holder and with which the locking bolt can be pivoted between the locking position and the release position.

[0016] The brake pad holder further comprises a tool for pivoting the locking latch, wherein the locking latch has a tool opening into which the tool for pivoting the locking latch can be inserted.

[0017] The tool has a lever handle, an actuating pin insertable into the tool opening, a guide element guideable along a contour of the pad holder and a pivot axis insertable into the pad holder and arranged between the actuating pin and the guide element.

[0018] The guide element is positioned relative to the actuating pin in such a way that the tool can only be released from the pad holder when the locking latch is in a locking position.

[0019] With a brake pad holder and a tool designed in this way, changing the brake pad is possible in a simple, ergonomic and safe manner.

[0020] In particular, it is ensured that the tool can only be removed from the pad holder when the locking latch is locked.

[0021] In addition, the tool does not have to be held in the release position of the locking latch, so that the person changing the brake pad has both hands free to remove the brake pad to be replaced if necessary or to insert the brake pad to be installed into the guide channel.

[0022] The tool held on the pad holder also serves as a visualization of an incomplete brake pad change, since the tool can only be released from the pad holder when the locking latch is in the locked position.

[0023] Advantageous embodiments of the invention are the subject of the subclaims.

[0024] According to an advantageous embodiment, the guide element is designed as a guide pin with a neck piece and a head piece, wherein the neck piece is arranged parallel to the pivot axis on the lever handle of the tool.

[0025] According to a further advantageous embodiment, the actuating pin has a neck piece and a head piece, wherein the head piece of the actuating pin and the tool opening are shaped such that the head piece can be inserted into the tool opening only in the orientation of the tool opening in which the locking bolt is in the locking position.

[0026] The actuating pin thus fulfils two tasks at the same time, namely, firstly, the pivoting of the locking bolt when the lever handle is operated and, secondly, that the tool can only be inserted or removed in this locked position and thus effectively prevents the locking bolt from remaining in the release position, which could lead to the brake pad falling out.

[0027] In order to prevent the bracket from being pivoted out of the position holding the locking bar in the locked position, for example due to a stone impact, and thereby pivoting the locking bar into the release position, the bracket is arranged according to a further preferred embodiment on a side of the pad holder facing away from the brake pad in such a way that an end of a second leg of the bracket, designed as a locking piece, projects out of the locking bar in the direction of the pad holder end and a free end of the first leg is received in a bore of a bearing of the pad holder, while the remaining parts of the first leg, the second leg and a connecting piece connecting them to one another are arranged on a side of the locking bar facing the brake lever.

[0028] According to a further embodiment of the invention, the end of the locking bolt remote from the pivot axis is received in a slot of a bearing of the pad holder in the locking position.

[0029] This reliably secures the locking bolt against tilting in the locked position.

[0030] According to a further preferred embodiment, the contour along which the guide element can be guided is formed on the side of the bearing facing away from the pressure plate.

[0031] According to a further advantageous embodiment, the head piece of the guide element projects into the slot of the bearing of the pad holder after pivoting the locking bolt from the locking position towards the release position.

[0032] This effectively prevents the tool's lever handle from tilting when the tool is operated. Furthermore, together with the locking of the head of the actuating pin in the tool opening of the locking latch, it prevents the tool's pivot axis from jamming in the bearing's axis mount.

[0033] Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings.

[0034] They show: Fig. 1 a perspective view of an embodiment variant of a brake pad holder according to the invention with a brake pad fixed to a pad holder, Fig. 2 an enlarged detail of a part of the pad holder having the locking latch of the Fig. 1 shown brake pad holder, Fig. 3one of the Fig. 2corresponding perspective view of the brake pad holder cutout with the tool attached to the pad holder in the locking position of the locking latch, Fig. 4 a schematic perspective view of a variant of a tool for the brake pad holder, Figs. 5 and 6 a perspective detailed view of the Fig. 2 shown section of the brake pad holder with the tool attached in the locking position of the locking latch, Fig. 7 and 8 Figs. 5 and 6 corresponding representations in the release position of the locking latch and Fig. 9 to 11side views of the pad holder with the tool attached in the locking position, an intermediate position between the locking position and the release position and the release position.

[0035] In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to the exemplary representation and position of the brake pad holder, the pad holder, the brake pad, the tool, the lever handle, the locking latch, and the like selected in the respective figures. These terms are not to be understood as limiting, i.e., these references may change due to different working positions or the mirror-symmetrical design or the like.

[0036] Fig. 1 shows an embodiment variant of a brake pad holder according to the invention in the representation of a tool 8 attached to a pad holder 2 of the brake pad holder.

[0037] The pad holder 2 essentially has a pressure plate 21, on the upper side of which brake lever bearings 23 are formed for supporting a brake lever 3.

[0038] The brake lever bearings 23 are designed here as slotted bearing blocks which centrally accommodate a bearing axis 6 which is guided through eyes 31 of the brake lever 3, which is thus pivotably mounted on the pad holder 2 about an axis extending in the longitudinal direction of the pad holder 2.

[0039] In the area of ​​one end viewed in the direction of the longitudinal axis of the pad holder 2, a hanging bracket 9 is pivotally mounted.

[0040] On the end of the pad holder 2 opposite the hanging bracket 9, a locking latch 4 is pivotally held on the pad holder 2.

[0041] A brake pad 7 is slidably held in a guide channel 22 of the pad holder 2. The guide channel 22 is formed on the underside of the pressure plate 21 of the pad holder 2, facing away from the brake lever 3.

[0042] The brake pad 7 accordingly has a guide web (not shown) which is inserted into the guide channel 22 which is preferably dovetail-shaped in cross section.

[0043] As in the Figures 9 to 11 As can be seen, one of the edges of the locking bolt 4 is designed as a locking bar 41, which projects through a slot-like recess in the pressure plate 21 of the pad holder 2 into the guide channel 22.

[0044] This position is also referred to below as the locking position of the locking bolt 4.

[0045] The release position of the locking bolt 4 is a position in which the locking bar 41 is pivoted out of the slot-like recess in the pressure plate 21 of the pad holder 2.

[0046] In this locking position, the brake pad 7 is prevented from sliding along the guide channel 22 by the fact that its guide web projects into the guide channel 22 and is thus held firmly in its functional position on the pad holder 2.

[0047] To perform a pivoting movement, the locking bolt 4 is held at one end on a pivot bearing 24 arranged on the pad holder 2, in particular one formed thereon. A pivot axis 44 of the locking bolt 4 is guided through the pivot bearing 24, so that the locking bolt 4 is held on the pad holder 2 so as to be pivotable about a pivot axis 44 extending substantially in the direction of the longitudinal extent of the pad holder 2.

[0048] On a region of the locking bolt 4 remote from the pivot axis 44 of the locking bolt 4, a bracket 5 is arranged which is pivotably mounted on the pad holder 2.

[0049] The bracket 5 serves to limit the pivoting movement of the locking bolt 4 to a pivoting range between the locking position and the release position of the locking bolt 4. For this purpose, the bracket 5 is provided with a first leg 51, as shown in the Figures 2 and 3 is shown, pivotally mounted in a bearing 25 of the pad holder 2 about an axis parallel to the pivot axis 44 of the locking bolt 4.

[0050] A second leg 52 of the bracket 5 is guided with its free end, designed as a locking piece 53, through a bracket receptacle 43, designed as a bore, of the locking bolt 4.

[0051] The bracket 5 is approximately U-shaped overall and is preferably made of spring steel which, when under pretension in the locking position, presses the locking bolt 4 into the locking position.

[0052] To prevent unintentional pivoting of the bracket 5, for example as a result of stone impact, the bracket 5 is arranged on a side of the pressure plate 21 of the pad holder 2 facing away from the brake pad 7 in such a way that the locking piece 53 protrudes from the locking bar 4 in the direction of the lower pad holder end (at which the locking bar 4 is arranged), while the remaining parts of the first leg 51, the second leg 52 and a preferably arcuate connecting piece connecting them to one another are arranged on a side of the locking bar 4 facing the brake lever. Due to this arrangement, the bracket 5 is shielded from stones thrown up from a gravel bed of a rail by the upper part of the locking bar 4, which protrudes from the side of the pressure plate 21 of the pad holder 2 facing away from the brake pad 7.

[0053] In the release position of the locking bolt 4, as for example in the Figs. 7 and 8As shown, the bracket 5 is relaxed and holds the locking bolt 4 in the release position.

[0054] To replace the brake pad 7, it is necessary to pivot the locking latch 4 from its locked position to the release position. For this purpose, a tool 8 is used to pivot the locking latch 4.

[0055] The locking bolt 4 has a tool opening 42 into which the tool 8 for pivoting the locking bolt 4 can be inserted.

[0056] The single presentation in Fig. 4 The tool 8 shown has a lever handle 81, an actuating pin 84 which can be inserted into the tool opening 42, a guide element 82 which can be guided along a contour 28 of the pad holder 2 and a pivot axis 83 which can be inserted into the pad holder 2 and is arranged between the actuating pin 84 and the guide element 82.

[0057] If the locking latch 4 is in its locking position, the tool 8 can be applied to the locking latch 4 and the bearing 25 of the pad holder 2.

[0058] First, the pivot axis 83 is inserted into a designated axis receptacle 26 of the bearing 25. At the same time, the actuating pin 84 is inserted into the tool opening 42.

[0059] The insertion of the actuating pin 84 into the tool opening 42 is only possible in the locking position of the locking bolt 4. For this purpose, as shown in the Fig. 3 - 6 shown, a head piece 842 of the actuating pin 84 is designed with a shape that allows insertion of the head piece 842 into the tool opening 42 of the locking bolt 4 only in a predetermined angular position.

[0060] The tool opening 42 is designed here as an elongated hole, while the head piece 842 of the actuating pin 84 is shaped in such a way that it can be inserted through the tool opening 42 in the predetermined angular position, but upon pivoting of the tool 8 and thus pivoting of the head piece 842 of the actuating pin 84 after passing through the tool opening 42, it engages behind the wall surrounding the tool opening 42. This prevents the head piece 842 from being pulled out through the tool opening 42 in the Figs. 7 and 8 shown release position of the locking bolt 4 is prevented.

[0061] The guide element 82 also has a neck piece 821 and a head piece 822.

[0062] The neck piece 821 serves as a guide pin that extends parallel to the pivot axis 83 on the lever handle 81 of the tool 8. This neck piece 821 can be guided along the contour 28 of the pad holder 2. In the preferred embodiment shown here, the contour 28 is formed on the side of the bearing 25 facing away from the brake pad 7.

[0063] The contour 28 of the bearing 25 is shaped such that the head piece 822 of the guide element 82 is clearly above the contour 28 in the locking position of the locking bolt 4 in order to enable the pivot axis 83 of the tool 8 to be inserted into the axis receptacle 26 in the bearing 25.

[0064] After pivoting the tool 8 in an unlocking direction A, in which the locking bolt 4 is moved in the direction of the release position, the head piece 822 of the guide element 82 successively comes into a position behind the contour 28 of the bearing 25 and thus prevents a movement of the head piece 822 parallel to the pivot axis 83 of the tool 8 and thus a removal of the tool from the pad holder 2.

[0065] As in the Fig. 1-3 and 5-8 As further shown, the end of the locking bolt 4 remote from the pivot axis 44 is received in the locking position in a slot 27 of the bearing 25 of the pad holder 2, whereby the locking bolt 4 is secured against tipping over as a result of a displacement of the brake pad 7 along the longitudinal axis of the pad holder 2.

[0066] When the tool 8 is attached, the head piece 822 of the guide element 82 projects into the slot 27 of the bearing 25 of the pad holder 2 after pivoting the locking bolt 4 in the direction of the release position and thus ensures a correctly executed pivoting movement of the lever handle 81 of the tool 8.

[0067] The pivoting movement of the tool 8 for releasing the brake pad 7 from its position locked by the locking bar 4 on the pad holder 2 is in the Figs. 9, 10 and 11 shown.

[0068] Fig. 9 shows the locking position in which the locking bar 41 of the locking bolt 4 protrudes into the guide channel 22 of the pad holder 2.

[0069] The tool 8 is attached to the pad holder 2. The pivot axis 83 is accommodated in the axis receptacle 29 of the pad holder 2. The actuating pin 84 is inserted into the tool opening 42. In this position, the guide element 82 is located above the contour 28 of the bearing 25 of the pad holder 2.

[0070] Fig. 10 shows an intermediate position of the tool 8 and the locking bolt 4 between the locking position and the release position.

[0071] Here, the locking bar 41 is partially pivoted out of the guide channel 22. The head piece 842 of the actuating pin 84 already partially engages behind the rear wall of the locking bar 4 surrounding the tool opening 42, so that the tool 8 can no longer be removed from the pad holder 2 in this position. The guide element 82 is placed on the contour 28 of the bearing 25.

[0072] Fig. 11finally shows the release position of the locking bolt 4, in which the locking bar 41 completely releases the guide channel 22, so that a brake pad 7 guided in the guide channel 22 can be pushed out or slip out of the pad holder 2.

[0073] Since the tool cannot be removed in the release position of the locking latch 4, this allows the person carrying out the pad change to let go of the tool 8 and thus have both hands free, in particular to be able to insert the new brake pad into the pad holder 2.

[0074] In order to be able to remove the tool 8 again after inserting a new brake pad 7 into the pad holder 2, the tool is pivoted in a locking direction B opposite to the unlocking direction A.

[0075] In this case, the locking bar 4 is pivoted back into the slot-like recess in the pressure plate 21 of the pad holder 2 with its locking bar 41 to secure the brake pad 7 against slipping out of the guide channel 22.

[0076] In this case, the head piece 822 of the guide element 82 successively reaches a position above the contour 28 of the bearing 25. Likewise, the head piece 842 of the actuating pin 84 returns during this pivoting movement to a position in which it can be moved out of the tool opening 42 in a direction parallel to the pivot axis 83 of the tool 8, so that the tool 8 can be removed from the pad holder 2 in the direction parallel to the pivot axis 83 of the tool 8 after the locking position of the locking bolt 4 has been reached. LIST OF REFERENCE SYMBOLS

[0077] 2Pad holder 21Pressure plate 22Guide channel 23Brake lever bearing 24Pivot bearing 25Bearing 26Axle mount 27Slot 28Contour 3Brake lever 4Locking bolt 41Locking bar 42Tool opening 43Bail holder 44Pivoting axis 5Bracket 51First leg 52Second leg 53Locking piece 6Bearing axle 7Brake pad 8Tool 81Lever handle 82Guide element 821Neck piece 822Head piece 83Pivot axis 84Actuating pin 841Neck piece 842Head piece 9Hanging loop AUnlocking direction BLocking direction

Claims

1. Tool (8) for actuating a locking latch (4) locking a brake lining (7) at a lining holder (2) of a brake lining holder for a rail vehicle, having a lever handle (81), an actuating journal (84) which is arranged at the lever handle (81) and is insertable into a tool opening (42) of the locking latch (4), characterized in that a guide element (82) and a pivot axis (83) arranged between the actuating journal (84) and the guide element (82) are arranged at the lever handle (81), wherein the guide element (82) is guidable along a contour (28) of the lining holder (2) and wherein the guide element (82) is positioned in relation to the actuating journal (84) such that the tool (8) can only be detached from the lining holder (2) in a locking position of the locking latch (4).

2. Tool (8) according to claim 1, characterized in that the guide element (82) is designed as a guide journal with a neck piece (821) and a head piece (822), wherein the neck piece (821) is arranged parallel to the pivot axis (83) of the tool (8) at the lever handle (81) of the tool (8).

3. Tool (8) according to claim 1 or 2, characterized in that the actuating journal (84) has a neck piece (841) and a head piece (842), wherein the head piece (842) of the actuating journal (84) and the tool opening (42) are shaped such that the head piece (842) can only be inserted into the tool opening (42) in the alignment of the tool opening (42) in which the locking latch (4) is in the locking position.

4. Brake lining holder for a rail vehicle and tool (8) for pivoting a locking latch (4), wherein the brake lining holder has a lining holder (2) and a brake lining (7) held in a locked manner at the lining holder (2), wherein the lining holder (2) has a pressure plate (21) with a guiding duct (22) extending in the longitudinal direction of the lining holder (2), in which guiding duct the brake lining (7) is movably held, wherein, in order to lock the brake lining (7) in the longitudinal direction of the lining holder (2), the locking latch (4) is pivotably held at the lining holder (2), wherein the locking latch (4) protrudes into the guiding duct (22) in a locking position fixing the brake lining (7) in a functional position and is removed from the guiding duct (22) in a release position, wherein, at an end of the locking latch (4) remote from a pivot axis (44) of the locking latch (4), a bracket (5) is arranged which is pivotably mounted on the lining holder (2) and allows the locking latch (4) to be pivoted between the locking position and the release position, wherein the locking latch (4) has a tool opening (42) into which the tool (8) for pivoting the locking latch (4) can be inserted, characterized in that the tool (8) is designed according to any one of the preceding claims, wherein the pivot axis (83) of the tool (8) can be inserted into the lining holder (2).

5. Brake lining holder and tool (8) according to claim 4, characterized in that the bracket (5) is arranged on a side of the pressure plate (21) facing away from the guiding duct (22) such that an end of a second limb (52) of the bracket (5) designed as a locking piece (53) protrudes out of the locking latch (4) in the direction of an end of the lining holder and a free end of a first limb (51) is accommodated in a bore hole of a bearing (25) of the lining holder (2), while the remaining portions of the first limb (51), of the second limb (52), and a connection piece connecting these to each other are arranged on a side of the locking latch (4) facing a brake lever (3).

6. Brake lining holder and tool (8) according to claim 4 or 5, characterized in that the end of the locking latch (4) remote from the pivot axis (44) is accommodated in a slot (27) of a bearing (25) of the lining holder (2) in the locking position.

7. Brake lining holder and tool (8) according to any one of claims 4 to 6, characterized in that the contour (28), along which the guide element (82) is guidable, is integrally formed on a side of the bearing (25) facing away from the pressure plate (21).

8. Brake lining holder and tool (8) according to claim 4, wherein the tool (8) is designed according to claim 2, characterized in that the head piece (822) of the guide element (82) protrudes into the slot (27) of the bearing (25) of the lining holder (2) after the locking latch (4) has pivoted out of the locking position in the direction of the release position.