Locking device for pantograph

Abstract

To provide a locking device for preventing unintended lock release and movement from a storage position to a sliding contact position of a sliding plate device of a current collector.SOLUTION: A sliding plate device is movable between a storage position to a sliding contact position relative to a conductor rail. A locking device has a cam 31, a rotatably mounted shaft 32, and an anti-rotation device 33, the cam 31 disposed on the shaft 32 in a rotationally fixed manner and the cam 31 movable from a release position to a locking position by rotation of the shaft 32. The cam 31, in the storage position of the sliding plate device, is brought into contact with a first contact surface of the current collector by moving to a lock position of the current collector, preferably a lock position of a local unit of the current collector so that the cam blocks movement of the sliding plate device relative to the conductor rail. In the release position or the locking position, the anti-rotation device 33 surely locks rotational movement of the shaft 32 for fixing the cam 31.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a fixing device and a method for fixing a slider device of a current collector in a retracted position, the slider device being movable relative to a conductor rail between a retracted position and a sliding contact position. [Background technology]

[0002] Current collectors and methods for operating them with a slider device, which is a slider pressed against a conductor rail in a sliding contact position, are well known from the prior art and are commonly used in rail vehicles for transmitting power from a conductor rail to the rail vehicle. The conductor rail is usually arranged in the area of ​​the running rail, also called the third rail. In known current collectors, the slider is arranged on a rocker, rocker arm or guide formed from a joint, which serves to fix or move the slider relative to the conductor rail. By means of a mechanical suspension of this slider, the slider can be pressed with a defined pressure against the sliding contact surface of the conductor rail and thus moved into the sliding contact position. Here, a distinction is made between a conductor rail and a current collector with a slider pressed against the upper side of the conductor rail or against the lower side of the conductor rail or against a side of the conductor rail in a sliding contact position. The contact strip can be brought into contact with the conductor rail by its upward or downward movement on the conductor rail, usually via a starting ramp, and the rocker or joint guide can be pushed back onto the contact strip so that the required contact pressure can be provided by a spring element, which can be designed as a mechanical torsion spring, a wound spring or a rubber spring.

[0003] In addition, if, for example, the rail vehicle is powered in a different way, the slider device can be moved from the sliding contact position to the stowed position by means of rockers, rocker arms or guides formed by the joints. For example, the expanded use of vehicles with corresponding current collectors in the rail network may require switching between different power supply systems when these rail vehicles traverse the rail network. The associated rail vehicles may then be further equipped with current collectors that deviate from the power rail system in order to enable the use of the rail vehicles on the respective rail line. Therefore, when no power transmission can take place on a current collector, the associated current collector or its slider device must be separated from the conductor rail and moved to a stowed position on the rail vehicle. Even if only a part of the current collectors of the rail vehicle is used for power transmission, it is appropriate to separate unused current collectors or sliders from the associated conductor rail in order to avoid unnecessary wear of the respective sliders.

[0004] Known current collectors often have a pressure device of the slider arrangement, which in the sliding contact position presses the slider against the conductor rail to counteract railway movements and minimize mechanical overstresses of the slider, e.g. caused by impacts due to high speed. However, it is also necessary to hold the slider arrangement of the rail vehicle securely in the stowed position to prevent unlocking due to loads caused by the operation of the rail vehicle and unintentional movement of the slider arrangement from the stowed position to the sliding contact position. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE DISCLOSURE It is therefore an object of the present invention to provide an apparatus and method by which the contact strip arrangement of a current collector can be simply and safely locked in the storage position. [Means for solving the problem]

[0006] This object is achieved by a locking device having the features of claim 1, a current collecting device having the features of claim 14 and a method having the features of claim 15.

[0007] Advantageous embodiments of the invention are the subject matter of the dependent claims. Also, all combinations of at least two of the features set out in the description, the claims and / or the drawings are within the scope of the invention.

[0008] The locking device for rotational movement according to the invention for fixing the slider device of the current collector in a storage position, the slider device being movable between a storage position and a sliding contact position relative to the conductor rail, comprises a cam, a rotatably mounted shaft and a rotation prevention device. According to the invention, the cam is arranged on the shaft so as to be rotatably fixed and is movable by rotation of the shaft from a cam release position, in which the cam releases the slider device from movement, to a cam lock position, in which the cam supports the slider device in the storage position. If the slider of the slider device is separated from the conductor rail and the slider device is moved to the storage position, the cam can be moved to the locking position by rotation of the shaft. In the locking position, the cam comes into contact with the current collector, preferably with a locker unit of the current collector, with a first contact surface such that movement of the slider device relative to the conductor rail is prevented. In other words, the cam prevents the slider from returning from the storage position to the sliding contact position by contact between the current collector and the first contact surface of the cam. In order to fix the cam in the release or locking position, the rotational movement of the shaft is reliably prevented by the anti-rotation device. Thus, the cooperation of the anti-rotation device, the cam and the shaft according to the invention makes it possible to fix the slider device in the storage position by fixing the cam in the locking position and preventing the rotational movement of the shaft.

[0009] Preferably, the locking device according to the invention is arranged on a current collector comprising a pressure device with a slider arrangement, with which the slider forms a sliding contact surface, and a rocker unit, whereby a pressure is formed on the slider arrangement arranged on the rocker by means of the rocker of the rocker unit designed to be pivotable and the spring element of the pressure device, so that the slider can be moved relative to the conductor rail and pressed against the conductor rail into the sliding contact position with the required pressure to form the sliding contact. The rocker unit of the pressure device can be designed to be rotatable, so that the unloaded rocker with the slider arrangement attached to it can be moved from a retracted position to a sliding contact position relative to the conductor rail. This required pressure can be provided by a spring element. The spring element can be a mechanical, pneumatic or hydraulic spring element suitable for generating a contact pressure. The rocker unit thus allows the movement of the slider or the slider arrangement between the sliding contact position and the retracted position. The rocker of the rocker unit can thereby be arranged to be pivotable by means of a simple pivot joint or can also be formed from several joints, each arranged at a pivot point. It is conceivable that the locking device according to the invention is arranged in the locker unit of the current collector and that a cam of the locking device in the locked position supports the locker unit of the current collector in such a way that the slider device is fixed in the storage position.

[0010] In the context of the present invention, the term "anti-rotation device" is understood to mean any device which reliably prevents the rotation of the shaft of the locking device relative to its axis of rotation by forming a positive connection, since this connection can be easily released in order to release the shaft again, but also allows a particularly high force transferability. Thus, the cam can be fixed in its release or lock position by forming a positive connection between the anti-rotation device and the shaft on which it is arranged to be rotatably fixed, and in addition the shaft can be released again by releasing this positive connection between the anti-rotation device and the shaft in order to move the cam from the release position to the locking position or from the locking position to the release position.

[0011] The anti-rotation device comprises a pin arranged in the shaft along its axis of rotation, a bolt and a bushing fixed along the shaft. To be able to block the rotational movement as required, the bolt can be inserted into the pin perpendicular to the axis of rotation of the shaft and into a recess of the bushing that at least partially surrounds the shaft and the pin, so that a secure connection between the bolt and the bushing is formed. Preferably, the bolt can be inserted into at least one recess of the bushing along the axis of rotation of the shaft, so as to form a secure connection between the bolt and the bushing. It is considered that the axis of rotation of the shaft and the longitudinal axis of the pin arranged in the shaft coincide. To achieve a particularly secure fixation of the rotational movement of the shaft, the bolt can mesh through the shaft and the pin.

[0012] It will be understood by those skilled in the art that in order to move the cam from the locked position to the released position or vice versa, the shaft must be arranged rotatably in the bushing when it is at least partially engaged around the bushing. The bushing itself can be fixed to the locking device, the current collector or a further element of the rail vehicle, independently of the shaft, to allow locking of the rotational movement of the shaft via the bolt. Thus, advantageously, in order to prevent the rotational movement of the shaft, the bolt is securely engaged in a recess of the fixed bushing, whereby the bolt can be engaged or disengaged by a pin, preferably by movement of the pin in the shaft along or relative to the axis of rotation of the shaft.

[0013] It is particularly advantageous if the pin is mounted in the shaft via a spring and can be moved along the rotation axis of the shaft against the spring force. Preferably, the locking of the shaft is then effected by movement of the pin against the spring force along the rotation axis of the shaft, while the locking of the shaft can be effected by movement of the pin or by insertion of the bolt into a recess of the bushing by the spring force. The bolt connected to the pin can be engaged or snapped into at least one recess of the bushing by the spring force.

[0014] It is further shown to be advantageous if the bolt inserted in the pin is moved in a groove formed in the shaft. Advantageously, the groove limits the path of the bolt and therefore also the path of the pin in the shaft. Preferably, grooves formed in the shaft, offset 180° from the outer periphery of the shaft, limit the path of the bolt passing through the shaft.

[0015] At least two grooves may be arranged along the circumference of the bushing to lock the cam in a locked and / or released position. The locked and released positions or the length of the path between the locked and released positions may be defined as a function of the position of the recess on the circumference of the bushing. Preferably, at least two recesses are arranged offset from each other at an angle of 90° on the circumference of the bushing. This allows, for example, that the cam is locked in the released position when it engages with the first recess and that the cam is locked in the locked position after being moved 90° when it engages with the second recess. In other words, the cam can be fixed in each case after a rotation of 90° of the cam. Even more preferably, the four recesses are arranged evenly around the circumference of the bushing, i.e. spaced 90° from each other in the case of a cylindrical bushing surrounding a shaft. Thus, a bolt passing through the shaft can simultaneously engage two recesses arranged opposite each other to lock the rotational movement of the shaft and to fix the position of the cam. To facilitate the insertion of the bolt into the recess, the recess may be designed like a slot.

[0016] If the recess has at least one insertion ramp by which the bolt can be inserted into the recess, the bolt can slide into the recess in a simple manner and with minimal resistance when the position of the cam is changed. Preferably, the insertion ramp is formed by a chamfer.

[0017] To further secure the slider arrangement in the retracted position, the cam can be brought into contact with a second contact surface of the current collector and / or with a second contact surface of the housing of the locking device and / or with a second contact surface of a retaining device of the locking device. In this way, forces, in particular forces transmitted to the slider arrangement and / or the locker unit due to acceleration, can be transmitted to the housing of the locking device, to the current collector, in particular its support device or pressure device, or to the rail vehicle. It is conceivable that this retaining device forms part of the housing of the locking device and / or is connected to the housing.

[0018] The axis of rotation of the shaft and the axis of rotation of the locker unit may be parallel and / or spaced apart. Preferably, the axis of rotation of the shaft of the locking device extends parallel to and is spaced apart from the axis of rotation of the locker unit.

[0019] A mounting plate can be arranged on the bushing for mounting the bushing along the shaft of the locking device, in particular for a rotatably fixed mounting. This fastening plate can be arranged on the holding device of the locking device using a detachable connection, preferably using a screw connection. This holding device of the locking device is connected to the current collector and / or to the rail vehicle on which the locking device is arranged. It has been shown to be advantageous if the holding device also supports the shaft of the locking device. It is conceivable that the holding device of the locking device is formed at least partially by an element of the current collector, for example by a pressure device or a support device of the current collector. According to a preferred embodiment of the mounting plate, the mounting plate has two holes, one of which surrounds the shaft and the other serves for the passage of a connection means, preferably a screw. According to this embodiment, the bushing is arranged in a first hole of the fastening plate surrounding the shaft, such that the shaft passes through the bushing and the fastening plate. Washers can be used for fine adjustment of the fastening plate and for alignment with respect to the holding device, in particular when fastening by a screw connection. In addition, the washers can increase the safety of the detachable connection.

[0020] For easy operation of the anti-rotation device of the locking device, the shaft may have a prismatic outer contour at one end, preferably a square prismatic outer contour. A tool complementary to the prismatic outer contour of the shaft, such as a wrench or a nut complementary to the prismatic outer contour, may be used to move the shaft and thus the cam. Preferably, a pin is inserted into one end of the shaft, and preferably a prismatic outer contour is provided on the shaft at the end where the pin is inserted. Further preferably, a part of the shaft between the bushing or the mounting plate and the shaft end or the shaft end face has a prismatic outer contour. In this way, the prismatic outer contour may simultaneously form a stop for the bushing and / or the mounting plate.

[0021] It is conceivable that the pin may protrude beyond the shaft end face or shaft end when the rotational movement of the shaft is locked along the shaft rotation axis. By moving the protruding end of the pin, in particular by forcing the protruding end of the pin into the shaft, the positive lock between the bolt and the bushing can be released by guiding the bolt out of at least one recess of the bushing. Advantageously, the state of the anti-rotation device can also be checked via a simple visual check based on the part of the pin protruding beyond the shaft. If the pin protrudes beyond the shaft, it is positively engaged in a recess of the bushing and a rotational movement of the shaft is prevented. This allows a rotational movement of the shaft if the pin is inserted in the shaft and therefore there is no positive engagement between the bolt and the recess of the bushing. Preferably, the length of the hole formed in the shaft for receiving the pin corresponds at least to the length of the pin. Thus, the path of movement of the pin in the shaft corresponds at least to the length of the part of the pin protruding beyond the shaft end face. The part of the pin that protrudes beyond the face of the shaft when the rotational movement of the shaft is prevented may have a smaller diameter or a different cross section than the rest of the pin and may therefore be called the pin extension.More preferably, when the rotational movement of the shaft is prevented along the axis of rotation of the shaft, the pin protrudes beyond the shaft end face, at which end the shaft has a prismatic outer contour.Advantageously, for adjusting the cam using a tool by rotating the shaft, a tool designed complementary to the prismatic outer contour of the shaft may be placed on the prismatic outer contour and at the same time the pin may be pressed into the shaft using this tool to release the rotational movement of the shaft.

[0022] For protection of this anti-rotation device, the locking device may comprise an anti-rotation housing arranged on the outer circumference of the shaft. To ensure protection of the anti-rotation device, the anti-rotation housing should at least partially surround the anti-rotation device, thus protecting it from external factors such as dust, wear, lubricants and / or liquids. Preferably, the anti-rotation housing surrounds the bushing or the bolt. More preferably, the anti-rotation housing surrounds the bushing and the pin. Conceivably, the anti-rotation housing is cylindrical in shape and can be slid over the shaft and the bushing. Furthermore, the anti-rotation housing can be inserted into a recess of the retaining device, in which the bushing and the shaft are also arranged. To prevent unintended movement of the anti-rotation housing along the rotation axis of the shaft, a cam can act as a stop on one side of the anti-rotation device and a retaining device can act as a stop on the other side of the anti-rotation device.

[0023] To securely connect the cam to the shaft, the cam may be arranged on the shaft so as to be rotatably fixed thereto by a threaded connection passing through the shaft.

[0024] A current collector according to the invention for transmitting power from a conductor rail to a vehicle comprises a locking device according to the invention, the current collector comprising a support device, a slider device and a pressure device with a locker unit, the support device serving to fix the current collector to the vehicle, the slider device of the current collector being movable relative to the conductor rail and being able to be pressed against the conductor rail by the pressure device in a sliding contact position using pressure to form a sliding connection. Further advantageous embodiments of the current collecting device result from the characterizing statements of the dependent claims which refer to claim 1 of the device.

[0025] In a method for fixing a slider device of a current collector, movable between a retracted position and a sliding contact position relative to a conductor rail, in a retracted position by a locking device having at least one cam, a rotatably mounted shaft and an anti-rotation device, a rotational movement of the shaft can be released by the anti-rotation device to move a cam arranged to be rotatably fixed on the shaft, and then, after the slider device has been moved to the retracted position, the cam can be moved from the released position to a locked position by rotation of the shaft and brought into contact with a first contact surface of the current collector, preferably a first contact surface of a locker unit of the current collector, such that movement of the slider device is blocked relative to the current collector. After the slider device has been moved to the retracted position and the cam has been moved from the released position to the locked position, a rotational movement of the shaft fixing the cam in the locked position can be reliably blocked by the anti-rotation device.

[0026] Further advantageous embodiments of the method result from the recitation of the features of the device claim 1 and the dependent claims which refer to device claim 1. Likewise, all features and embodiments described for the device refer equally, even if not identically, to the method according to the invention. In this context, conventional language variations and / or substantial synonyms of the respective terms in conventional linguistic usage, in particular the use of synonyms supported by generally accepted linguistic literature, are encompassed by the present disclosure, even if each is not explicitly mentioned in the explicit description.

[0027] It is understood that the above-mentioned embodiments and example embodiments, which are further described below, can be formed individually as well as in any combination with one another, without departing from the scope of the present invention. Likewise, it is understood that the above-mentioned embodiments and example embodiments, which are further described below, relate to equivalent or at least similar methods according to the present invention, even if the latter is not mentioned separately.

[0028] Embodiments of the invention are illustrated diagrammatically in the drawings and are explained by way of example below. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 shows a side view of a current collector with the slider arrangement in a sliding contact position. [Diagram 2] FIG. 2 shows a side view of the current collector of FIG. 1 with the contact strip arrangement in a retracted position. [Diagram 3] FIG. 3 shows a cross-sectional view of a locking device according to the invention with a cam in a locked position. [Figure 4] FIG. 4 shows an isometric view of the locking device according to the invention shown in FIG. 3 in cross section with the cam in the release position. [Diagram 5] FIG. 5 shows a longitudinal section through the locking device according to the invention shown in FIG. 3 with the shaft in the locked state. [Figure 6] FIG. 6 shows a longitudinal section through the locking device of FIG. 5 with the shaft in the released state. [Figure 7] FIG. 7 shows a detail Y of the locking device of FIG. [Figure 8] FIG. 8 shows detail Z of the locking device of FIG. [Figure 9] FIG. 9 shows in a perspective view an anti-rotation device for a locking device according to the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] 1 and 2 taken together show a current collector 10 between wheels 11 of a vehicle (details not shown) on a conductor rail 12. This current collector 10 comprises a support device 13 and a pressure device 14 as well as a slider device 16 with a slider 15. The support device 13 serves to fix the current collector on the vehicle (details not shown). The slider 15 is connected to the pressure device 14 and bears against the conductor rail 12 in the sliding contact position shown. In the embodiment shown here, the sliding contact surface of the slider 15 is in contact with the surface of the conductor rail 12 in such a way that an electrical contact between the current collector 10 and the conductor rail 12 is ensured. However, it is also conceivable that the slider 15 is brought into contact with the conductor rail 12 from below.

[0031] The pressure device 14 presses the contact strip 15 against the conductor rail 12 with a pressure, the pressure device 14 comprising a rocker unit 19 which generates the pressure with the aid of a rocker 20 and a spring element 21. The pressure device 14 further comprises a fixing element 22 which connects the spring element 21 to the support device 13. This spring element 21 can be formed, for example, from a helical spring (not shown) and an axle, which is connected to the axle in such a way that it is rotatably fixed. The rocker unit 19 forms a rotatably mounted sleeve which surrounds the spring element 21 or the helical spring and the axle. In particular, the rocker 20 is arranged or screwed in the sleeve such that a rotation of the sleeve on the axle or on the helical spring causes the rocker 20 and the contact strip device 16 to rock. The spring element 21 is designed such that a pressure is only exerted in the direction of the conductor rail. By means of the rocker device of the rocker unit 19, the rocker 20 and the contact strip device 16 can be moved between a sliding contact position and a retracted position, as shown in FIG. 2. In relation to the cross section of the railway vehicle (not shown), the contact pressure device 14 with the slider device 16 is consequently arranged in an enlarged effective area 28 of the conductor rail 12 in the sliding contact position and in a reduced effective area 29 in the retracted position. This allows the effective cross section of the vehicle to be reduced and thus collisions with objects or structures can be prevented. In this way, the possibilities for using such railway vehicles on various tracks can be substantially expanded.

[0032] From a joint view of Figures 3 and 4, the adjustment of the cam between the locked and released positions becomes clear, with Figure 3 showing the cam in the locked position and Figure 4 showing the cam 31 in the released position. In the cross-sectional view of the locking device 30 according to the invention in Figure 3, it can be seen that the cam is brought into contact with the locker 20 of the locker unit 19 at the first contact surface 34 to support this locker unit 19 rotatably about the rotation axis 43 in the retracted position. To additionally fix the locker unit 19 in the retracted position, the cam 31 comes into contact with a second contact surface 42 of the housing 50 of the locking device 30. The cam 31 is connected non-rotatably to the shaft 32 via a threaded connection 49, so that the cam 31 can be oscillated by the rotation of the shaft 32. In addition, the pin 36 guided in the shaft 32 is visible, as the pin 36 protrudes from the end face 47 of the shaft 32 when the shaft 32 is locked against rotation. In order to be able to operate the locking device 30 by means of simple tools, the end of the shaft 32 from which the pin 36 projects is provided with a prismatic outer contour 46, here in the shape of a square. It can be seen in particular from figure 4 that a bushing 38 (not shown) arranged on the fastening plate 44 is connected via the fastening plate 44 and the screw connection 45 to a holding device 51 of the locking device 30. For fine adjustment of the fastening plate 44 or the screw connection 45 relative to the shaft 32 and the bushing 38, a washer 51 is arranged between the fastening plate 44 and the screw 53.

[0033] The function of locking and releasing the rotational movement of the shaft 32 can be understood by looking at the details Y and Z extracted from the figures 5 and 6 shown in figures 7 and 8 in conjunction with figures 5 and 6. Figure 5 shows the locking device 30 with the rotational movement of the shaft 32 locked, whereas figure 6 shows the locking device 30 with the rotational movement of the shaft 32 released. It can be seen that the shaft 32 is mounted rotatably with respect to the axis of rotation 35 and the cam 31 is non-rotatably arranged on the shaft 32 via a threaded connection 49 in order to be moved by the shaft 32. The anti-rotation device 33 essentially consists of a bushing 38, a mounting plate 44 arranged on the bushing 38, a pin 36, a bolt 37, a spring 40 and an anti-rotation housing 48. The pin 36 is spring-loaded in the shaft 32 by the spring 40 and is slidable in the shaft 32 along the axis of rotation of the shaft 32. In the state shown in FIG. 5, the user can easily recognize that the rotation of the shaft 32 is locked because the pin 36 extends beyond the end face 47 of the shaft 32. The portion of the pin 36 that protrudes beyond the end face 47 of the shaft has a noticeably smaller diameter than the remaining portion of the pin 36 and can therefore be referred to as a pin extension 52. When the rotation of the shaft 32 is locked, as shown in FIG. 5, the bolt 37 is securely inserted into the recess 39 of the bushing 38, locking the rotation of the shaft 32, since the bushing 38 is connected to the fixed retaining device 51 via the mounting plate 44. In contrast, FIG. 6 shows the state of the anti-rotation device in which the rotation of the shaft 32 is released. The pin extension 52 is fully inserted into the shaft 32, allowing the pin 36 to be flush with the shaft end face 47, allowing the user to visually confirm that the rotation of the shaft 32 is released. The pin 36 may be inserted through the simple attachment of a tool that complements the prismatic outer contour 46 of the shaft 32, which tool may be used to insert the pin 36 into the shaft 32 as well as to effect rotational movement of the shaft 32.By forcing the pin 36 into the shaft 32 against the spring force of the spring 40, the bolt 37 is moved along the rotation axis 35 and the pin 36, and furthermore, since the bolt 37 does not engage with the recess 39, the positive connection between the recess 39 of the bushing 38 and the bolt 37 is released. After the pin 36 is inserted into the shaft 32, the rotational movement of the shaft 32 can thus move the cam 31 from the locked position to the released position, or the cam 31 from the released position to the locked position.

[0034] FIG. 9 shows a portion of the shaft 32 with the anti-rotation device 33 arranged thereon, the illustration of the anti-rotation housing 48 being omitted for clarity. It can be seen that the shaft 32 has a prismatic outer contour 46 at one end, which is engaged by a tool (not shown). In this case, the end with the prismatic outer contour 46 extends from the shaft end face 47 to the fastening plate 44. According to the state of the anti-rotation device 33 shown in FIG. 9, the bolt 37 is located outside the recess 39, and thus the rotational movement of the shaft 32 is released, since the bolt 37 does not form a secure connection with the bushing 38. However, if the pin 36 is moved along the rotation axis 35 (not shown) of the shaft 32 past the shaft end face 47, then the bolt 37, which passes through the pin 36 and the shaft 32, is moved in the groove 41 and inserted into the recess 39 of the bushing 38. The insertion of the pin 37 is greatly simplified by the insertion ramp 54. In addition, the four recesses 39, of which at least two are visible in Fig. 9, are arranged at 90° angles to each other across the circumference of the bushing 38. This means that the cam 31 can be rotated 90° to be moved from the release position to the lock position or vice versa, as the position of the recesses does not allow locking the rotational movement of the shaft 32 in any other position.

Claims

1. A locking device (30) for fixing the contact strip device (16) of the current collector (10) in the storage position, wherein the contact strip device (16) is movable between a storage position and a sliding contact position with respect to the conductor rail (12), The locking device (30) comprises a cam (31), a rotatably mounted shaft (32), and a rotation prevention device (33). The cam (31) is positioned on the shaft (32) so as to be rotatably fixed, and the cam (31) is movable from the released position to the locked position by the rotation of the shaft (32). In the storage position of the contact strip device (16), the cam (31) is moved to the locked position of the current collector (10), preferably the locked position of the rocker unit (19) of the current collector (10), so as to prevent the contact strip device (16) from moving relative to the conductor rail (12), thereby bringing it into contact with the first contact surface (34). A locking device characterized in that, in the released position or the locked position, the rotational movement of the shaft (32) that fixes the cam (31) is reliably prevented by the rotation prevention device (33).

2. The anti-rotation device (33) includes a pin (36) positioned inside the shaft (32) along the axis of rotation (35) of the shaft (32), a bolt (37), and a bushing (38) fixed along the shaft (32). The locking device according to claim 1, characterized in that the bolt (37) is inserted into the pin (36) perpendicular to the axis of rotation (35) of the shaft (32), and the bolt (37) can be inserted so as to fit into at least one recess (39) of the bushing (38) that at least partially surrounds the shaft (32) and the pin (36) so as to prevent rotational movement of the shaft (32).

3. The locking device according to claim 2, characterized in that the pin (36) is attached to the shaft (32) via a spring and is movable along the rotation axis (35) of the shaft (32) against the spring force of the spring (40).

4. The locking device according to claim 3, characterized in that the pin (37) inserted into the pin (36) is movable in a groove (41) formed in the shaft (32).

5. The locking device according to claim 4, characterized in that at least two recesses (39) are arranged along the outer circumference of the bushing (38) that fixes the cam (31) in the locked position and / or the released position.

6. The locking device according to claim 5, characterized in that the recess (39) has at least one insertion inclined portion (54).

7. The locking device according to claim 6, characterized in that the cam (31) is brought into contact with the second contact surface (42) of the current collector (10) and / or the second contact surface (42) of the housing (50) of the locking device (30) and / or the second contact surface (42) of the holding device (51) of the locking device (30).

8. The locking device according to claim 7, characterized in that the rotation axis (35) of the shaft (32) and the rotation axis (43) of the rocker unit (19) are parallel and / or spaced apart.

9. The fastening plate (44) is positioned on the bushing (38), The locking device according to claim 8, characterized in that the fastening plate (44) is arranged on the retaining device (51) by a detachable connection, preferably by a screw connection (45).

10. The locking device according to claim 9, characterized in that the shaft (32) has a prismatic outer contour (46) at one end, preferably a prismatic outer contour (46) formed in a square shape.

11. The locking device according to claim 10, characterized in that the pin (36) protrudes beyond the shaft end face (47) along the rotation axis (35) of the shaft (32) when the rotational movement of the shaft (32) is prevented.

12. The locking device according to claim 11, characterized in that the anti-rotation housing (48) is arranged on the outer circumference of the shaft (32) and is configured to at least partially surround the anti-rotation device (33), particularly the bushing (38) and / or bolt (37).

13. The locking device according to claim 12, characterized in that the cam (31) is arranged to be rotatably fixed to the shaft (32) by a screw connection (49) that engages with the shaft (32) through the shaft (32).

14. A current collector (10) that transmits power from a conductor rail (12) to a vehicle, wherein the current collector (10) has a locking device (30) according to any one of claims 1 to 13. The current collector (10) comprises a contact strip device (16) and a pressure device (14) having a rocker unit (19). The current collector (10) is characterized in that the contact strip device (16) is movable relative to the conductor rail (12) by the pressure device (14) and can be pressed against the conductor rail (12) at a sliding contact position using pressure to form a sliding connection.

15. A method for fixing a contact strip device (16) of a current collector (10), which is movable between a storage position and a sliding contact position with respect to a conductor rail (12), to the storage position by a locking device (30) having at least one cam (31), a rotatably mounted shaft (32), and a rotation prevention device (33), The rotational movement of the shaft (32) is released by the rotation prevention device (33) in order to move the cam (31), which is positioned to be rotatably fixed to the shaft (32). Subsequently, in the storage position of the sliding contact strip device (16), the cam (31) is moved from the open position to the locked position by the rotation of the shaft (32) so as to prevent the movement of the sliding contact strip device (16) from being blocked from the current collector (10), and is brought into contact with the first contact surface (34) of the current collector (10), preferably the first contact surface (34) of the rocker unit (19) of the current collector (10). Furthermore, the method is characterized in that the rotational movement of the shaft (32) that fixes the cam (31) in the locked position is reliably prevented by the rotation prevention device (33).

Images