AU2282300A

AU2282300A - Device and method for controlled current collection between contact wire and atrack-bound, electrically operated high speed vehicle

Info

Publication number: AU2282300A
Application number: AU22823/00A
Authority: AU
Inventors: Werner Brand; Johannes Kremlacek; Wolfgang Waldi; Hans-Jurgen Weidemann
Original assignee: DaimlerChrysler Rail Systems GmbH
Current assignee: Alstom Transportation Germany GmbH
Priority date: 1998-12-03
Filing date: 1999-11-26
Publication date: 2000-06-19
Also published as: PL347929A1; WO2000032436A1; CN1329548A; DE19856637C2; EP1140549A1; KR20010086076A; DE19856637A1; JP2002532040A; CA2353579A1

Description

Description A device and method for a controlled current collection between an overhead contact wire and a railbound, electrically driven high-speed vehicle. 5 The invention concerns a device for a controlled current collection between an overhead contact wire and a railbound, electrically driven high-speed vehicle, with a streamlined housing provided on the roof of the vehicle to accommodate a lifting device on which a rocker of a current collector carrying a collector bar and 10 having horns, is fastened and a conductor to shunt off the current taken up by the current collector. The invention also concerns a method for the controlled current collection between an overhead contact wire and a railbound, electrically driven high-speed 15 vehicle, whereby the current collector with the contact bar and the rocker supported by the insulator is vertically raised and lowered. It is known that the maximum speed, achievable by high-speed vehicles, in particular by railbound vehicles, is to a considerable extent determined by the 20 current collection from the overhead contact wire by the current collector that is pressed against the overhead contact wire. A contact force between the overhead contact wire and the current collector occurs that can considerably vary due to the dynamic interaction between the overhead contact wire and the current collector. 25 The magnitude of this contact force is considerably influenced by the friction between the collector bar and the overhead contact wire, rigidity of the overhead line, the local or temporary changes in the geometry due to the various heights of the overhead contact wire, zig-zagging layout of the overhead contact wire, wear 30 of the collector bar and of the overhead contact wire, varying aerodynamic influences due to the changing direction of travel and vehicle shapes, wind and vehicle speeds, the oscillating behaviour of the current collector and of the overhead contact wire as well as the change of the flow velocity in tunnels during oncoming traffic.

To control the contact force as a function of the considerable changes of the height of the overhead contact wire even at high speeds, DE-A 30 33 449 describes a two-stage pantograph-type current collector with an upper pantograph abutting against the overhead contact wire via the current collector 5 rocker that is controlled to provide a constant contact force against the overhead contact wire, a main pantograph carrying the former, a first adjusting device assigned to the upper pantograph, a controlling device emitting adjusting signals to retain the contact force constant as well as a second adjusting device assigned to the second main pantograph. By means of a second control device adjusting 10 signals are supplied to maintain a constant temporal average adjustment travel of the first control device. The main pantograph is no longer locked and its position is continuously controlled in such a manner that the average adjustment travel of the upper pantograph is kept constant. A distribution of work between the two stages of the pantograph-type current collector takes place in a such a manner 15 that low-frequency oscillations of relatively large amplitude are absorbed and controlled by the main pantograph and high-frequency oscillations of relatively small amplitudes are processed by the adjusting device assigned to the upper pantograph. At the same time the upper pantograph oscillates within a relatively narrow tolerance range about a constant temporal average adjustment travel. 20 The control of this known pantograph-type current collector is so carried out that first the actual value of the adjustment travel is supplied as a measured value to the second control device, assigned to the main pantograph. Adjusting signals for the second adjusting device, assigned to the main pantograph, are formed from 25 the deviation of this actual value from a nominal value, the nominal value corresponding to the temporal average of the adjustment travel of the first adjusting device, assigned to the upper pantograph. If the adjustment travel is changed in one direction, first the upper pantograph is moved to keep the contact force to the overhead contact wire constant and then the main pantograph is 30 moved so far that the original value of the adjustment travel of the first adjusting device is achieved again. The hydraulic adjusting motors of this known teaching make the construction complicated and are the reason that the two-stage pantograph-type current collector was not a success in practice. In addition, if great height differences have to be overcome, the main pantograph has to be fully extended in the operation, so that the miniature current collector carried by the top pantograph has only a small operating range which is inadequate at speeds over 250 km/h. 5 The proposed pantograph-type current collector has another advantage, namely that only height differences can be controlled with it, other factors influencing the contact force remain without consideration. On the other hand, the main pantograph is not in the position either to control high-frequency fluctuations of the contact force, like the ones occurring in the high speed range between 200 10 400 km/h. In addition, this known two-stage pantograph-type current collector generates a considerable sonic pressure at high speeds. 15 The teaching according to EP-A 0 649 767 attempts to solve these problems by that a streamlined rigid domed housing is fastened on the roof of the vehicle, this housing accommodates the lower part of the current collector together with the pivoting mechanism provided on the bottom feet of both insulators (insulator and conductor). The conductor and the insulator are arranged offset to each other by 20 a specified distance in the transverse direction of the vehicle, so that to achieve a reduction of the aerodynamic noise. Furthermore, the insulator or the conductor has a streamlined cross-section. Despite the fact that the second insulator (conductor) is arranged in the region of 25 the break-down edge of the air flow, it is still contributing to a non-insignificant degree to the high sound level of the total current collector construction. By virtue of the relatively rigid fastening of the insulator shaft and of the conductor, this known current collector has an altogether unsatisfactory control to compensate for the fluctuations of the contact forces and of overcoming great height 30 differences. Finally, from EP-A 0 697 304 a current collector is known, that is in the position to overcome height differences between 100 to 800 mm with its two superposed hydraulic lifting and lowering devices. The lower part of the current collector with its lifting and lowering devices is enclosed by an accommodating dome, while the lower part of both lifting and lowering devices is integrated in the body of the carriage. The contact force or the distance between the collector bar and the overhead contact wire is determined and the vertical movement of the lifting and 5 lowering device is controlled using the determined value. In the case of great height differences the head of the current collector, including the insulators, has to be driven out from the accommodating dome by the lifting and lowering devices, resulting in the protrusion of the insulators that are offset in 10 the transversal direction past the dome and create a sound level. Moreover, the hydraulic lifting and lowering devices require a considerable space that would be achieved by its integration in the body of the carriage on the one hand and in a considerable construction height of the accommodating dome on the other, over two carriages. This results in a complicated, expensive and difficult construction. 15 Considering this state-of-the-art, the object of the invention is to develop a current collector of the type mentioned in the introduction, that makes a controlled current collection feasible without any problems by controlling the force and/or the position in the high-speed range while simultaneously significantly reducing the 20 aerodynamic noises. This objective is achieved by a device of the generic type mentioned in the introduction having the characterising features of claim 1 and by a method having the characterising features of claim 30. 25 Advantageous developments become apparent from the sub-claims. The device according to the invention makes the realisation of great extension heights of the current collector feasible and at the same time to overcome 30 extreme height differences of the chain mechanism. Due to the fact that the entire lifting mechanism and the insulator through the housing remain housed even in the extended state and because only a single insulator is used, the aerodynamic noises are effectively reduced. On the other hand the housing, accommodating the current collector, has a small construction height in the retracted state, requires little maintenance and can be simply installed on the roof of the vehicle. The expensive domed accommodation according to the state-of-the-art can be 5 completely omitted. On the other hand the solution according to the invention can be integrated without any problem in vehicles having domed constructions. In the following the invention is described in detail on an embodiment based on the drawings. 10 They show in: Fig.1 - a perspective view of the construction of the current collector with the main components: cover, roof cover, insulator and current collector head, 15 Fig.2 - a sectioned illustration according to line A-A of Fig.1 of the current collector according to the invention in the extended state, Fig.3 - a sectioned illustration according to line A-A of Fig.1of the current 20 collector according to the invention in the retracted state, Fig.4 - the basic principle of the lifting device for normal lifting heights, Fig.5 - a section through two cover segments joined with the tackle, 25 Fig.6 - a view from above of Fig.5 schematically showing the fastening of the tackle, Fig.7 - a view from above on the electro-mechanical drive in the form of a chain 30 drive for the lifting device, Fig.8 - a view of the rocker with the collector bar, Fig.9 - a top view of Fig.8, Fig.10 - a section according to line C-C of Fig.8 through the rocker body, Fig. 11 - a schematic illustration of the height-variable cable guiding between the insulator/current collector and the terminal on the vehicle, 5 Fig.12 - the tackle guiding with pneumatic spring according to Fig. 11, and Fig.13 - the tackle guiding with pneumatic spring according to Fig.11. 10 As illustrated in Fig.1 on the roof 1 of a high-speed vehicle 2 a streamlined housing 3 with a base frame 4 is installed. This housing 3 may be a part of a domed construction on the roof of the vehicle, but it can be installed directly on the roof. 15 According to Fig.2 the housing 3 is made up from five tubular cover segments 5 that telescope into one another, each inside situated cover segment resting on and guided by the outside situated one. At the same time the innermost cover segment is constructed as an outward curved roof cover 6 and it covers the housing 3. In the centre of the curved roof cover 6 a trough 7 is formed, in the 20 centre of which an opening 8 is provided. On the innermost roof cover 6 a roof frame 9 is fastened, the roof frame having an opening 10 for an insulator carrier 12 that corresponds to the opening 8, through which opening an insulator 11 can be guided. The insulator 11 rests on the insulator carrier 12 that has a spindle nut 13 symmetrically to the axis B-B of the insulator. A spindle 16, that is 25 perpendicular to the roof frame 6 and is driven by an electric motor 14 via a gear drive 15, engages the spindle nut 13. The rotating movement of the motor is transmitted via the gear drive 15 to the spindle 16, that transforms the rotating movement into a vertical lifting movement and thus extends and retracts the insulator carrier 12 with the insulator 11 through the opening 8. 30 The electric motor 14, spindle 16, spindle nuts 13 and gear drive form a high frequency drive 71.

As this can be seen from Figs.5 and 6, each cover segment 5 has an L-shaped lower projection 17 directed toward the interior of the housing and an upper projection 18, also directed toward the interior. The lower projection 17 has a leg that is longer than the upper projection 18, that serves as a stop for the 5 respective inner cover segment. In the region of the lower projection 17 inside of the cover segment 5 a depression 19 is formed extending along the inside circumference of the cover segment. The cover segments 5 are made of a compound fibre material, e.g. glass fibre reinforced plastic material, that is reinforced with inserts in the region of the depression 19. The upper projection 18 10 has a sealing lip 70 that seals the intermediate space between the inner and outer cover segments 5 against moisture. A deflecting device 20, comprising a cable guide 21 and a guide pulley 22 is positioned on the inside of this part of the depression 19. 15 On the outside, approximately above the axis of rotation of the guide pulley 22, a suspension plate 23 is anchored on the cover segment 5. When two cover segments 5 are fitted into one another, the cable guide 21 is approximately vertically aligned with the suspension plate and is positioned in front of the guide 20 pulley 22. The guide pulley 22 is rotatably mounted on the insert. This assures a secure deflection of the cable. As Fig.6 shows, a cable 24 is undetachably secured with one of its end in the suspension plate 23. This cable 24 runs from the suspension plate 23 first 25 vertically to the cable guide 21 and then is deflected over the guide pulley 22 approximately horizontally to a tensioning device 25 tangentially fastened on the circumference of the outer cover segment. The tensioning device 25 comprises a tension spring 26 and an anchoring part 27 that is also fastened to an insert. 30 Four tackles, comprising in this manner a cable 24, suspension plate 23, cable guide 21, guide pulley 22 and tensioning device 25 are evenly distributed over the circumference of the cover segments and join each an inner cover segment with an outer cover segment.

On its ends allocated to the cover segments 5, the roof frame 9 has fastening plates 28 facing the interior of the housing 3, for the purpose of fastening the lifting devices 29, with which the roof cover 6 is raised or lowered (see Figs.2 and 3). The lifting device 29 is made up from four scissors-like support frames 30, 5 each support frame formed from two lower support arms 31 and 32 as well as one upper support arm 33. Both lower support arms 31 and 32 have a sliding bearing 34. The upper support arm 33 is pivotably hinged at a stationary point on the fastening plate 28 of the roof frame 9, its other end is joined via a hinge 35 with the lower support arm 31. The other lower support arm 32 is connected with 10 the upper support arm 33 via a lever arm 37, that forms with the upper support arm 33 a further sliding bearing 38 on the latter. Thus the two hinges 35, 36 and the sliding bearings 34 and 38 enclose a parallelogram. Vertically aligned with the upper support arm 33, stationarily fastened on the roof frame 9, is the fastening plate 39 on the base frame 4, on which fastening plate the support arm 31 is 15 pivotably, but stationarily, fastened (see Fig.2). This lifting device is suitable, for example, for particularly great extended heights, preferably up to 2.8 m over the roof height of the vehicle. To compensate for normal lifting heights, e.g. that of the rapid train system, the 20 lifting device 29 comprises at least two support frames 30, that comprises one support arm 33 pivotably hinged on the roof frame 9 and one support arm 32, also pivotably hinged on the base frame 4. With its other end the support arm 32 is hingedly joined with the support arm 33, while, as this is shown in principle in Fig.4, the length of the support arm 32 is L and the length of the support arm 33 25 is 2L. The hinging point of the support arm 32 on the support arm 33 divides the latter in two lever arms of the same lengths and the end of the support arm 33 can move linearly on the base frame 4 relative the centre of gravity of the support arm 32, so that the support arm 33 will rise and lift the roof cover 6. 30 Fig.7 shows an electro-mechanical drive 40 installed on the base frame 4. This drive has two guide tracks 41 that are positioned along the longitudinal sides of the cover segments 5 and are parallel to one another to accommodate a chain train 43 guided between two sprockets with shafts 42. Both chain trains 43 are driven by a chain drive 44 driven by an electric motor. The movement of the chain drive 44 is transferred to the shafts 42 of both chain trains 43. The lower end of the support arm 32 connected at both ends with the chain train 5 43, supported in the guide track 41 and thus can be linearly displaced when the chain drive 44 moves along the guide track 41. Because the other lower support arm 31 is held stationarily, when the lower end of the respective other support arm 32 is displaced the entire support frame 30 can be continuously raised or lowered via the hinges and the sliding bearings. The chain drive 44 drives 10 synchronously the parallel chain trains 43, so that the raising or lowering of all four support bases 30 takes place smoothly. This raising and lowering movement is transferred to the roof cover 6. When raising the roof cover 6, the individual cover segments 5 are extended in a telescoping manner from the inside to the outside against the tackles subjected to spring forces. During lowering the cover 15 segments 5 are retracted from the outside to the inside by the tackles subjected to spring forces. During retraction the support arms of the support frame 30 fold inward. When the support bases 30 have been fully retracted, the roof frame 9 of the roof cover 6 rests on the base frame 4 of the housing 3. 20 The height of the cover segments 5 corresponds approximately to the height of the insulator, while the head of the insulator protrudes past the opening 8 (see Fig.5). The insulator 11 is rigidly secured on the insulator carrier 12. As Figs.8 and 9 25 show, the upper insulator flange 45 carries a rocker 46 with a streamlined rocker body 47, in which the collector bar 48 is mounted. Between the collector bar 48 and the insulator flange 45 there is a spring/damper unit 49 situated (see Figs.9 and 10). This spring/damper unit 49 is made up from 30 two one-piece levers 50, each having two strap-like lever arms 51 and 52 joined with and at right angle to one another, which are at a distance, corresponding approximately to the width of the collector bar 48, from one another. Both lever arms 51 and 52 can rotate together about a fixed centre of rotation Dp, while the lever arm 51, that is somewhat longer than the lever arm 52, with its slightly angled end is pivotably hinged on the collector bar mounting 53. The other end of the shorter lever arm 52 is fastened to a tension spring 54 that is fastened on the insulator flange 45 in an adjustable manner. Between the two parallel levers 50 a hydraulic rotary damper 55 is fastened, the actuating member 56 of which 5 engages a slot 57 machined in the lever 50. When a force acts on the collector bar 48, the tension spring 54 causes a rotary movement of the lever 50, so that the slightly angled lever arm 51 carries out a pivoting or a rotating movement. This rotating movement is durably absorbed by the rotary damper 55 and damped. The rigidity of the tension springs 54 is very low. This spring/damper 10 unit 49 makes an exclusively vertical spring deflection feasible. The rigid fastening of the rocker body 47 on the insulator 11 assures that the wind load is absorbed by the streamlined rocker body with the exception of only a very small aerodynamic portion of the collector bar. 15 The rocker 46 has horns 58 (Fig.8) that can be adjusted by a pneumatic drive 59 mounted in the rocker body 47 to suit various rocker widths, e.g. 1950 mm and 1600 mm. As it is shown in principle in Fig.1, in the roof cover 6 there are inward opening 20 hatches 60 positioned in the longitudinal direction of the housing 3, into which hatches the horns 58 can drop when the rocker 46 is rotated 90* about its axis to align with the longitudinal direction of the housing 3 and is lowered. The high-voltage cable 61 (see Figs. 11-13) fitted between the insulator 11 and 25 the terminal (not illustrated) on the vehicle 2, runs vertically helically in the vicinity of the extended insulator axis towards the roof of the vehicle and is held by a tackle 62. On the opening 10 of the insulator carrier 12 a roller mounting 63 (Fig.13) is secured by its flange, the roller mounting holding a bearing block 64. The bearing block 64 accommodates a shaft 65 with two adjacent situated cable 30 pulleys 66. A cable 67 is reversed by 180* around each cable pulley 66, both ends of the cables aligned vertically with two deflecting pulleys 68 fastened on the base frame 4, these deflecting pulleys guiding the ends of the cables 67 to an extremely long pneumatic spring 69. Thus the cable 67 forms a tackle 72, that is subjected to a tensile force holding the lifting device 29 of the high-voltage cable 61 always tight. The cables 67 are made of non-conductive material, plastic material for example. 5 The magnitude of the pressure acting on the collector bar 48 is a complex value, subjected to constant changes due to the speed of the vehicle, the intensity and direction of the wind, the position of the chain mechanism guiding the overhead contact wire and its oscillations induced by the current collector, friction and wind 10 and the relative movement of the vehicle. In the first active control stage of the method according to the invention the height differences of the chain mechanism are compensated for. The compensation is carried out with an electro-mechanical drive, for example a chain drive, that equalises height differences of the chain mechanism between 4.8 to 6.3 m and vertical chain oscillations with amplitudes 15 >50 mm in the frequency range below 3 Hz. The chain drive converts a corresponding horizontal movement into a vertical movement of the lifting devices 29 encapsulated in the housing 3. Simultaneously, and relative to this vertical movement taking place in the first control stage, the current collector (insulator, rocker, cable) oscillates in a second active control stage in a vertical lift of 20 maximum ± 50 mm in a frequency range up to 15 Hz. The lifting movement of the second control stage is generated by means of a high-frequency actuator, a linear electro-motor drive, for example. The high-frequency vibrations between the overhead contact wire and the 25 collector bar are absorbed and dampened in a quasi-simultaneous further step by uncoupling the forces between the collector bar and the current collector.

List of reference numerals 1 Roof 50 Lever 2 High-speed vehicle 51 Lever arm 3 Housing 52 Lever arm 4 Base frame 53 Collector bar mounting 5 Cover segments 54 Tension spring 6 Roof cover 55 Rotary damper 7 Trough in 6 56 Actuating member 8 Opening in 6 57 Slot in 51 9 Roof frame 58 Horns 10 Opening in insulation carrier 59 Pneumatic drive 11 Insulator 60 Hatch in 6 12 Insulation carrier 61 High-voltage cable, 13 Spindle nut conductor 14 Electric motor 62 Tackle 15 Gear drive 63 Roller mounting 16 Spindle 64 Bearing block 17 Lower projection of 5 65 Shaft in 65 18 Upper projection of 5 66 Cable pulley 19 Depression 67 Cable 20 Deflecting device 68 Deflecting pulley 21 Cable guide 69 Pneumatic tension spring 22 Guide pulley 70 Sealing lip 23 Suspension plate 71 High-frequency drive 24 Cable 72 Tackle 25 Tensioning device B-B Insulator axis 26 tension spring L Length of the support 27 Anchoring part arm 32 28 Fastening plates D, Centre of rotation 29 Lifting device 30 Support frame 31 Lower support arm 32 Lower support arm 33 Upper support arm 34 Sliding bearing 35 Hinge 36 Hinge 37 Lever arm 38 Sliding bearing 39 Fastening plates 40 Electro-mechanical drive 41 Guide track 42 Shafts 43 Chain train 44 Chain drive 45 Insulator flange 46 Rocker 47 Rocker body 48 Collector bar 49 Spring/damper unit

Claims

1. A device for a controlled current collection between an overhead contact wire and a railbound, electrically driven high-speed vehicle, with a streamlined 5 housing provided on the roof of the vehicle to accommodate a lifting device on which a rocker of a current collector carrying a collector bar and having horns, is fastened with an insulator to hold and insulate the current collector and a conductor to shunt off the current taken up by the current collector, characterised in that the housing (3) is made up from inner and outer cover 10 segments (5) that are guided telescope-like with a roof cover (6) formed integrally on the innermost cover segment and the cover segments (5) can be extended and retracted to various lifting heights by at least two lifting devices (29) that are arranged symmetrically about the insulator axis (B-B) within the cover segments and are actuated by an electro-mechanical drive (40) 15 positioned horizontally relative the insulation axis, wherein the lifting devices (29), the conductor and further components (40, 13, 14, 15, 16) are vertically enclosed by the cover segments (5), and that the rocker (46) with the collector bar (48) and insulator (11) can be vertically displaced by a high-frequency drive (71) relative to the lifting heights of the cover segments (5) and is 20 rotatably arranged about the axis (B-B), and that between the collector bar (48) and the insulator flange (45) a spring/damper unit (49) is provided to uncouple the vertically acting forces and to damp the fluctuations of the contact force, and that the conductor between the insulator and the terminal on the vehicle is constructed as a high-voltage cable (61) that can be adjusted 25 to suit various lifting heights.

2. A device according to claim 1, characterised in that the housing (3) is part of a domed construction on the roof of the vehicle. 30

3. A device according to claim 1 and 2, characterised in that each cover segment (5) is provided with an inward shaped upper and lower stop-like projection (17, 18).

4. A device according to claim I to 3, characterised in that the inner and outer cover segments (5) are joined with one another by at least four simply deflected cables (24) that are evenly distributed on the circumference and extend approximately parallel to the insulator's axis (B-B) and are tensioned 5 against spring force, wherein the cables (24) are so arranged between the outer and inner cover segment (5) that with one of their ends they are attached to the external circumference of the inner lower cover segment (5) and the other ends are guided via a deflecting device (20) fastened on the internal circumference of the lower outer cover segment (5) to a tensioning 10 device (25) that is tangentially fastened on the circumference of the outer cover segment (5).

5. A device according to claim 1 to 3, characterised in that the inner and outer cover segments (5) are joined with one another by manifold deflected cables 15 (24) that are evenly distributed on the circumference of the cover segments (5) and extend approximately parallel to the insulator's axis (B-B) and are tensioned against spring force, wherein the cables (24) are so arranged between the outer and inner cover segment (5) that with one of their ends they are attached to the external circumference of the inner lower cover segment 20 (5) and the other end is guided via a deflecting device (20) fastened on the internal circumference of the lower outer cover segment (5) to a tensioning device (25) that is tangentially fastened on the circumference of the outer cover segment (5). 25

6. A device according to claim 1 to 5, characterised in that the lower projection (17) has an L-shaped construction, whereby in the retracted state of the cover segments (5) each projection of the inner cover segment (5) rests the outer cover segment (5). 30

7. A device according to claim 1 to 6, characterised in that the deflecting device (20) comprises a guide pulley (22) and a cable guide (21) positioned in front of the guide pulley.

8. A device according to claim 1 to 6, characterised in that the tensioning device (25) comprises a tension spring (25) and an anchoring part (27) or a cable winch. 5

9. A device according to any one or several of the preceding claims, characterised in that a depression (19) is formed on the inside of the outer cover segment (5), in which depression the deflecting device (20) and the tensioning device (25) are arranged.

10 10. A device according to any one or several of the preceding claims, characterised in that the upper projection (18) of the respective outer cover segment (5) has a sealing lip (70) that snugly abuts against the circumference of the respective inner cover segment (5). 15

11. A device according to any one of the preceding claims, characterised in that the heights of the cover segments (5) are preferably approximately the same.

12. A device according to any one of the preceding claims, characterised in that the height of the cover segments (5) is approximately that of the height of the 20 insulator.

13. A device according to any one or several of the preceding claims, characterised in that the cover segments (5) and the roof cover (6) are made of a compound glass fibre reinforced or chemical fibre reinforced plastic 25 material.

14. A device according to claim 1, characterised in that the lifting device (29) comprises at least two support frames (30), each of them made up from one support arm (33) pivotably hinged on the roof frame (9) connected with the 30 roof cover (6) and one lower support arm (32), of which the lower support arm (32) with one of its end aligned with the fastening plate (28) of the support arm (33) on the base frame (4) of the housing (3) is stationarily pivotably accommodated and with it other end is pivotably hinged on the support arm (33), while the support arm is arranged linearly displaceably relative to the lower support arm (32).

15. A device according to claim 14, characterised in that the length of the support 5 arm (33) is twice that of the lower support arm (32) and the lower support arm (32) is so hinged on the support arm (33) that the latter is divided in two lever arms of equal lengths.

16. A device according to claim 1, characterised in that the lifting device (29) 10 comprises at least two pantograph-type support frames (30), each of them comprising one upper support arm (33) pivotably hinged on the base frame (4) connected with the roof cover (6) and two lower support arms (31, 32), of which one lower support arm (31) aligned with the fastening plate (28) of the upper support arm (33) on the base frame (4) of the housing (3) is stationarily 15 pivotably accommodated and the other end lower support arm (32) is arranged linearly displaceably relative the first one.

17. A device according to claim 1 and 16, characterised in that the upper support arm (33) and the lower stationarily fastened support arm (31) are connected 20 via a hinge (35) and the linearly displaceable lower support arm (32) is connected with the upper support arm (33) via a hinge (36) and a sliding bearing (38) via a lever arm (37), whereby both lower support arms (31, 32) are connected with one another via a further sliding bearing (34) in such a manner that the hinges (35, 36) and the sliding bearings (34, 38) form a 25 parallelogram.

18. A device according to any one or several of the preceding claims, characterised in that the electro-mechanical drive (40) is constructed as a cable, spindle or chain drive (44) for a continuous train (43) having guide 30 tracks (41) that extend along the longitudinal walls of the cover segments (5) and are parallel to one another, in which the lower linearly displaceable support arm (32) of the lifting devices is fastened as part of the train.

19. A device according to one or several of the preceding claims, characterised in that the support arms (33) of the extended support frame (30) are inclined either inward or outward. 5

20. A device according to one or several of the preceding claims, characterised in that in the retracted state the support arms (33, 31, 32) of the support frame (30) are superposed.

21. A device according to one or several of the preceding claims, characterised in 10 that the lifting height of the lifting device (29) over the roof of the vehicle is between 650 mm and 2.8 m.

22. A device according to claim 1, characterised in that in the direction of travel the roof cover (6) has hatches (60) that are at a distance from one another 15 corresponding to the width of the rocker.

23. A device according to claim 1 and 22, characterised in that the rocker (46) can be rotated at least by 1800 and in the retracted state the horns (58) of the rocker (46) drop into the openings of the hatches (60). 20

24. A device according to claim 1, characterised in that the width of the rocker (46) can be adjusted by a pneumatic drive (59) provided in the rocker body that pulls in or extends the horns (58).

25 25. A device according to one or several of the preceding claims, characterised in that the high-frequency drive (71) is a linear drive, preferably a spindle (16) with gear drive (15) driven by an electric motor (14)

26. A device according to claim 1, characterised in that the rocker (46) and the 30 insulator (11) are firmly joined to one another and the collector bar (48) has a single degree of freedom for a vertical movement in the rocker body.

27. A device according to claim 1, characterised in that the high-voltage cable (61) is a flexible lead that is helically arranged axially aligned with the insulator's axis (B-B) about at least one tackle (72) under tension and vertically running between a roller mounting (63) fastened on the insulation 5 carrier (12) and deflecting pulleys (68) fastened on the base frame (4).

28. A device according to claim 1 and 27, characterised in that the roller mounting (63) has at least two adjacent pulleys (66) over which a cable (67) is guided, while being deflected, to an extremely long pneumatic tension spring (69) 10 fastened on the base frame (4) not aligned axially with the insulator's axis (B B), while the pneumatic tension spring (69) is arranged between the two ends of the cable (67) for the purpose of applying the tension to the tackle (72).

29. A device according to claim 1 and 25, characterised in that the spring/damper 15 unit (49) comprises tension springs (54) with extremely low rigidity and a rotary damper (55).

30. A method for a controlled current collection between an overhead contact wire and a railbound, electrically driven high-speed vehicle, whereby the 20 current collector with the contact bar and the rocker supported by the insulator is vertically raised and lowered, comprising the steps: a) electro-mechanical compensation of the height differences of the chain mechanism in a first active control stage by converting a horizontal movement into a vertical movement, 25 b) simultaneous movement of the current collector relative to the vertical movement of the step a) in an oscillating vertical lift in a second active control stage by a high-frequency drive, and c) absorption and damping of high-frequency vibrations simultaneously with the steps a) and b) by uncoupling the forces between the collector bar 30 and the current collector.

31. A method according to claim 30, characterised in that height differences between 650 mm and 2.8 m above the roof of the vehicle can be compensated for.