Abstract
A locking device for securing a contact strip device of a current collector in a storage position, the contact strip device being movable between a storage and sliding contact position relative to a conductor rail. The locking device has a cam, a rotatably mounted shaft and an anti-rotation device, the cam disposed on the shaft in a rotationally fixed manner and the cam movable from a release to locking position by rotation of the shaft, and the cam in the storage position of the contact strip device being able to be brought into contact at a first contact surface by being transferred to the locking position on the current collector in a manner that movement of the contact strip device is blocked relative to the conductor rail, and rotational movement of the shaft for securing the cam in the release or locking position being positively blocked of the anti-rotation device.
Claims
1. A locking device for securing a contact strip device of a current collector in a storage position, the contact strip device being movable between a storage position and a sliding contact position relative to a conductor rail, the locking device comprising a cam, a rotatably mounted shaft and an anti-rotation device, the cam being disposed on the shaft in a rotationally fixed manner and the cam being movable from a release position to a locking position by rotation of the shaft and the cam in the storage position of the contact strip device being able to be brought into contact at a first contact surface by being transferred to the locking position on the current collector, in such a manner that a movement of the contact strip device is blocked relative to the conductor rail, and a rotational movement of the shaft for securing the cam in the release position or the locking position being positively blocked by the anti-rotation device.
2. The locking device according to claim 1, wherein the anti-rotation device has a pin disposed inside the shaft along the rotational axis of the shaft, a bolt and a bushing fixed with respect to the shaft, the bolt being introduced into the pin perpendicular to the rotational axis of the shaft, and the bolt being able to be inserted in a form-fitting manner into at least one recess of the bushing, which at least partially surrounds the shaft and the pin, in such a manner that a rotational movement of the shaft is blocked.
3. The locking device according to claim 2, wherein the pin is spring-mounted within the shaft and is displaceable along the rotational axis of the shaft against the spring force of a spring.
4. The locking device according to claim 2, wherein the pin inserted in the pin is displaceable within a groove made in the shaft.
5. The locking device according to claim 2, wherein at least two recesses are disposed along the circumference of the bushing for fixing the cam in the locking position and/or the release position.
6. The locking device according to claim 2, wherein the recess has at least one insertion slope.
7. The locking device according to claim 1, wherein the cam is brought into contact with a second contact surface on the current collector and/or on a housing (of the locking device and/or on a holding device of the locking device.
8. The locking device according to claim 2, wherein the rotational axis of the shaft and the rotational axis of the rocker unit are parallel and/or spaced apart.
9. The locking device according to claim 2, wherein a fastening plate is disposed on the bushing, the fastening plate being disposed on a holding device by a detachable connection.
10. The locking device according to claim 2, wherein the shaft has a prismatic outer contour at one end.
11. The locking device according to claim 2, wherein the pin projects beyond a shaft end face when the rotational movement of the shaft is blocked along the rotational axis of the shaft.
12. The locking device according to claim 1, wherein an anti-rotation housing is disposed on the outer circumference of the shaft and at least partially encloses the anti-rotation device.
13. The locking device according to claim 2, wherein the cam is disposed in a rotationally fixed manner on the shaft by a screw connection engaging through the shaft.
14. A current collector for transmitting power from a conductor rail to a vehicle, the current collector having a locking device according to claim 1, wherein the current collector comprises a contact strip device and a pressure device having a rocker unit, the contact strip device of the current collector being movable relative to the conductor rail by the pressure device and being capable of being pressed against the conductor rail in a sliding contact position using a pressure force in order to form a sliding contact.
15. A method for securing a contact strip device of a current collector, which is movable between a storage position and a sliding contact position relative to a conductor rail, in the storage position by a locking device, which has at least one cam, a rotatably mounted shaft and an anti-rotation device, wherein a rotational movement of the shaft is released by the anti-rotation device in order to displace the cam disposed in a rotationally fixed manner on the shaft, and subsequently the cam in the storage position of the contact strip device is transferred from a release position into a locking position by rotation of the shaft and is brought into contact at a first contact surface at the current collector, in such a manner that a movement of the contact strip device is blocked relative to the current collector, and further subsequently a rotational movement of the shaft for securing the cam in the locking position is positively blocked by the anti-rotation device.
16. The locking device according to claim 1, wherein the cam in the storage position of the contact strip device being able to be brought into contact at the first contact surface by being transferred to the locking position on the current collector is on a rocker unit of the current collector.
17. The locking device of claim 9, wherein the detachable connection is a screw connection.
18. The locking device of claim 10, wherein the prismatic outer contour is in the form of a square.
19. The locking device of claim 12, wherein the anti-rotation housing at least partially encloses a bushing and/or a bolt of the anti-rotation device.
Description
[0029] Embodiments of the invention are shown schematically in the drawings and are explained below exemplarily.
[0030] FIG. 1 shows a side view of a current collector having a contact strip device in the sliding contact position;
[0031] FIG. 2 shows a side view of the current collector from FIG. 1 having the contact strip device in the storage position;
[0032] FIG. 3 shows a sectional view of a locking device according to the invention having a cam in the locking position;
[0033] FIG. 4 shows an isometric view of a locking device according to the invention as shown in FIG. 3 in a sectional view having the cam in the release position;
[0034] FIG. 5 shows a longitudinal section through a locking device according to the invention as shown in FIG. 3 having a shaft in the locked state;
[0035] FIG. 6 shows a longitudinal section through the locking device from FIG. 5 having a shaft in the released state;
[0036] FIG. 7 shows detail Y of the locking device from FIG. 5;
[0037] FIG. 8 shows detail Z of the locking device from FIG. 6; and
[0038] FIG. 9 shows an anti-rotation device of a locking device according to the invention in perspective view.
[0039] A combined view of FIGS. 1 and 2 shows a current collector 10 between wheels 11 of a rail vehicle (not shown in greater detail) on a conductor rail 12. The current collector 10 comprises a support device 13 and a pressure device 14 as well as a contact strip device 16 having a contact strip 15. The support device 13 serves to fasten the current collector in the vehicle (not shown in greater detail). The contact strip 15 is connected to the pressure device 14 and rests against the conductor rail 12 in the sliding contact position shown. In the embodiment shown here, a sliding contact surface of the contact strip 15 rests on a surface of the conductor rail 12 so that an electrical contact is established between the current collector 10 and the conductor rail 12. However, it is also conceivable that the contact strip 15 is brought into contact with the conductor rail 12 from below the conductor rail 12.
[0040] The pressure device 14 presses the contact strip 15 against the conductor rail 12 using a pressure force, wherein the pressure device 14 comprises a rocker unit 19 for forming the pressure force using a rocker 20 and a spring element 21. Further, the pressure device 14 comprises a fastening element 22 connecting the spring element 21 to the support device 13. The spring element 21 can be formed, for example, from a helical spring (not shown) and an axle, the helical spring being connected to the axle in a rotationally fixed manner. The rocker unit 19 forms a rotatably mounted sleeve which surrounds the spring element 21 or the coil spring and the axle. In particular, the rocker 20 is disposed or screwed to the sleeve so that a rotation of the sleeve on the axle or coil spring causes the rocker 20 and the contact strip device 16 to pivot. The spring element 21 is designed so that the pressing force is exerted solely in the direction of the conductor rail. By means of the pivoting device of the rocker unit 19, the rocker 20 together with the contact strip device 16 can be moved between the sliding contact position and a storage position shown in FIG. 2. Relative to a cross section of the rail vehicle (not shown), the contact pressure device 14 with the contact strip device 16 is consequently located in an extended effective range 28 on the conductor rail 12 in the sliding contact position and in a reduced effective range 29 in the storage position. This makes it possible to reduce an effective cross section of the vehicle and thus prevent possible collisions with objects or structures. The possible uses of a rail vehicle of this kind on different rail tracks can then be substantially expanded in this manner.
[0041] From the combined view of FIGS. 3 and 4, the adjustment of the cam between a locking position and a release position is apparent, with FIG. 3 showing the cam in the locking position and FIG. 4 showing the cam 31 in the release position. It can be seen in the sectional view showing the locking device 30 according to the invention in FIG. 3 that the cam is brought into contact with the rocker 20 of the rocker unit 19 at a first contact surface 34 and supports this rocker unit 19, which is rotatable about the rotational axis 43, in the storage position. For additional securing of the rocker unit 19 in the storage position, the cam 31 comes into contact with a second contact surface 42 on a housing 50 of the locking device 30. Since the cam 31 is non-rotatably connected to the shaft 32 via the screw connection 49, the cam 31 can be pivoted by rotating the shaft 32. In addition, the pin 36 guided within the shaft 32 is visible, the pin 36 projecting 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 a simple tool, the end of the shaft 32 from which the pin 36 projects is provided with a prismatic outer contour 46, presently in the form of a square. In particular, it can be seen from FIG. 4 that the bushing 38, (not shown) on which the fastening plate 44 is disposed, is connected to the holding device 51 of the locking device 30 via the fastening plate 44 and a screw connection 45. For fine adjustment of the fastening plate 44 or the screw connection 45 with respect to the shaft 32 and the bushing 38, a washer 51 is disposed between the fastening plate 44 and the screw 53.
[0042] A combined view of FIGS. 5 and 6 in conjunction with details Y and Z taken from FIGS. 5 and 6, which are shown in FIGS. 7 and 8, shows the function of locking and releasing the rotational movement of the shaft 32 can be seen. FIG. 5 shows the locking device 30 with a locked rotational movement of the shaft 32 while FIG. 6 shows the locking device 30 with a released rotational movement of the shaft 32. It can be seen that the shaft 32 is mounted rotatably about the rotational axis 35 and the cam 31, for displacement by means of the shaft 32, is disposed non-rotatably on the shaft 32 via a screw connection 49. The anti-rotation device 33 is essentially constructed from a bushing 38, a mounting plate 44 disposed thereon, a pin 36, a bolt 37, a spring 40 and an anti-rotation housing 48. The pin 36 is spring-loaded within the shaft 32 by means of the spring 40 and is slidable within the shaft 32 along the rotational axis of the shaft 32. The user can easily recognize that the rotation of the shaft 32 is locked in the condition shown in FIG. 5 because the pin 36 extends beyond the end face 47 of the shaft 32. The portion of the pin 36 projecting beyond the shaft end face 47 has a recognizably smaller diameter than the remaining portion of the pin 36, and thus can be referred to as the pin extension 52. When the rotational movement of the shaft 32 is locked, as shown in FIG. 5, the bolt 37 is positively inserted into the recesses 39 of the bushing 38 and locks a rotational movement of the shaft 32, since the bushing 38 is connected to the stationary holding device 51 via the mounting plate 44,. In contrast, FIG. 6 shows the state of the anti-rotation device in which the rotational movement 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 and allowing a user to visually identify that the rotational movement of the shaft 32 is released. The pin 36 can be inserted via the simply placement of a corresponding tool complementary to the prismatic outer contour 46 of the shaft 32, so that in addition to inserting the pin 36 into the shaft 32 using this tool, rotational movement of the shaft 32 can also be effected. By pushing the pin 36 into the shaft 32 against the spring force of the spring 40, the positive connection between the recesses 39 of the bushing 38 and bolt 37 is cancelled, since the bolt 37 is displaced along the rotational axis 35 together with the pin 36 and does not engage further in the recesses 39. After the pin 36 has been inserted into the shaft 32, a rotational movement of the shaft 32 can thus transfer the cam 31 from a locking position to a release position or from the release position to the locking position.
[0043] FIG. 9 shows a section of the shaft 32 having the anti-rotation device 33 disposed thereon; the illustrations of the anti-rotation housing 48 have been omitted for the sake of clarity. It can be seen that the shaft 32 has a prismatic outer contour 46 at one end portion, the prismatic outer contour 46 being able to be engaged by a tool (not shown). In the present case, the end section having 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, a rotational movement of the shaft 32 is released, since the bolt 37 is disposed outside the recesses 39 and thus does not form a positive connection with the bushing 38. However, if the pin 36 is moved beyond the shaft end face 47within the shaft 32 along the rotational axis 35 of the shaft 32 (not shown), then the bolt 37 passing through the pin 36 and the shaft 32 is displaced within the groove 41 and inserted into the recesses 39 of the bushing 38. The insertion of the pin 37 is greatly simplified by the insertion slopes 54. In addition, it can be seen in FIG. 9 that four recesses 39, at least two of which are visible, are disposed at an angle of 90 to one another across the outer circumference of the bushing 38. This means that the cam 31 is pivoted by 90 to be transferred from the release position to the locking position or from the locking position to the release position, since the position of the recesses does not permit locking of the rotational movement of the shaft 32 in any other position.
