WO2000032436A1

WO2000032436A1 - Device and method for controlled current collection between a contact wire and a track-bound, electrically operated high speed vehicle

Info

Publication number: WO2000032436A1
Application number: PCT/EP1999/009753
Authority: WO
Inventors: Werner Brand; Wolfgang Waldi; Hans-Jürgen Weidemann; Johannes Kremlacek
Original assignee: Daimlerchrysler Railsystems Gmbh
Priority date: 1998-12-03
Filing date: 1999-11-26
Publication date: 2000-06-08
Also published as: DE19856637A1; DE19856637C2; CN1329548A; AU2282300A; EP1140549A1; PL347929A1; CA2353579A1; KR20010086076A; JP2002532040A

Abstract

The aim of the invention is to develop a device and a method for controlled current collection between a contact wire and a track-bound, electrically operated high speed vehicle. The streamline housing (3) that is mounted on the vehicle roof consists of telescopically guided inner and outer cover segments (5) with a cover roof (6) which is moulded to the inner cover segment. The cover segments (5) are moved in and out to different lifting heights by at least two lifting devices (29) which are located in the interior of the housing and which are operated with an electromechanical drive. Said electromechanical drive is arranged horizontally in relation to the insulator axis B-B and the lifting devices (29) and all other built-in parts are vertically enclosed by the cover segments. The rocker (46), with the wearing strip (48) and the insulator (11), can be moved vertically in relation to the lifting heights of the cover segments (5) and rotated about the insulator axis B-B by means of a high-frequency drive (71).

Description

description

Device and method for the controlled current draw between a contact wire and a track-bound, electrically operated high-speed vehicle

The invention relates to a device for the controlled current draw between a contact wire and a track-bound, electrically operated high-speed vehicle, with a streamlined housing arranged on the vehicle roof for receiving a lifting device, to which a rocker-bearing rocker of a pantograph is attached, an insulator for Holding and isolating the pantograph and a conductor for deriving the current drawn by the pantograph.

The invention also relates to a method for controlled current draw between a contact wire and a track-bound, electrically operated high-speed vehicle, in which the current collector held by the insulator is raised and lowered vertically with a contact strip and a rocker.

The maximum speed achievable by high-speed vehicles, in particular rail vehicles, is known to be decisively determined by the current draw from the contact wire via the pantograph which is pressed against the contact wire. There is a contact force between the contact wire and the pantograph which can vary considerably as a result of the dynamic interaction between the contact wire and the pantograph. The size of this contact force is significantly influenced by the friction between the contact strips and the contact wire, the rigidity of the overhead line, the local or temporary geometry changes due to different contact wire heights, zigzag laying of the contact wire, wear of the contact strip and contact wire, different aerodynamic influences due to changing direction of travel and vehicle shapes, wind and vehicle speed, vibration behavior of the pantograph and the contact wire as well as change in flow speed in oncoming traffic in tunnels.

To control the contact force as a function of significant changes in the contact line height even at high speeds, DE-A 30 33 449 describes a two-stage scissor pantograph with an upper pair of scissors, which is attached to the contact line via the pantograph rocker and is regulated with respect to this constant contact force first control device assigned to the upper scissors, a control device which emits control signals to keep the contact force constant and a second control device assigned to the second main scissors. Control signals are supplied with a second control device in order to maintain an average travel of the first control device which is constant over time. The main scissors are no longer locked and their position is continuously controlled so that the travel of the upper scissors is kept constant on average. There is a division of labor between the two stages of the scissor pantograph in such a way that low-frequency vibrations of a relatively large amplitude are absorbed and corrected by the main scissors and high-frequency vibrations of a relatively small amplitude are processed by the actuating device assigned to the upper scissors. The upper scissors oscillate within a relatively narrow tolerance range over a travel path that is constant over time. The control of this known scissor pantograph is such that the actual value of the second control device assigned to the main scissors is first Travel path is supplied as a measured variable. Actuating signals for the second actuating device assigned to the main scissors are then formed from the deviation of these actual values from a target value which corresponds to the desired time average of the actuating path of the first actuating device assigned to the upper scissors. If the travel is changed in one direction, the upper scissors are first adjusted to keep the contact force to the overhead contact line constant, and then the main scissors are readjusted to such an extent that the original value of the travel of the first actuating device is reached again. The hydraulic servomotors of this well-known teaching complicate the design and are ultimately the reason why this two-stage pantograph pantograph could not prevail in practice. In addition, in the case of bridging large differences in height when driving, the main scissors must be set up completely, so that the miniature pantograph carried by the upper scissors only has a small working range, which is not sufficient at speeds> 250 km / h. The proposed scissor pantograph also has the disadvantage that only the height differences can be regulated with it, other factors influencing the contact force are not taken into account. On the other hand, the main scissors are also unable to compensate for higher-frequency contact force fluctuations, such as occur in the high-speed range between 250 and 400 km / h.

This well-known two-stage pantograph also causes considerable sound pressure in the high-speed range.

The teaching of EP-A 0 649 767 attempts to solve these problems by mounting a streamlined rigid dome housing on the vehicle roof, which arranges the lower part of the pantograph together with its on the lower feet of the two insulators (insulator and conductor) Includes swivel mechanism. The conductor and the insulator are at a predetermined distance offset from each other in the transverse direction of the vehicle so that a reduction of the aerodynamic noise is to be achieved. The insulator or conductor also has a streamlined cross section. Despite the fact that the second insulator (conductor) is arranged in the area of the trailing edge of the air flow, it is not inconsiderably involved in the still very high sound level of the entire pantograph construction. Due to the comparatively rigid attachment of the insulator shaft and conductor, this known current collector has an overall unsatisfactory control behavior in balancing out the fluctuations in contact force and in bridging large height differences.

Finally, a current collector is known from EP-A 0 697 304, which is able to bridge height differences between 100 to 800 mm by means of two hydraulic lifting and lowering devices arranged vertically one above the other. The lower part of the pantograph with its lifting and lowering devices is enclosed by a receiving dome, the lower of the two lifting and lowering devices being integrated in the car body. The contact force or the distance between the contact strip and contact wire is determined and the vertical movement of the lifting or lowering device is regulated with the determined value. In the event of large differences in height, the head of the pantograph, including the insulators, must be appropriately extended out of the receiving dome by the lifting and lowering devices, as a result of which the two insulators, which in turn are offset in the transverse direction, protrude beyond the dome and cause a corresponding sound level. The hydraulic lifting and

Lowering devices also have a considerable amount of space, which was created on the one hand by the integration into the car body and on the other hand by the considerable length of the receiving dome over two car bodies. This leads to a complicated, complex and heavy structure. In this prior art, the object of the invention is to develop a pantograph of the type mentioned at the outset which enables controlled power take-off without problems by means of force and / or position control in the high-speed range and at the same time significantly reduces the aerodynamic noise.

This object is achieved by a device of the aforementioned type with the characterizing features of claim 1 and by a method with the characterizing features of claim 30. Advantageous refinements can be found in the subclaims.

The device according to the invention makes it possible to realize large extension heights of the pantograph and at the same time to bridge extreme height differences of the chain assembly. The fact that the entire lifting mechanism and the isolator remain enclosed by the housing even in the extended state and only a single isolator is used reduce the aerodynamic noise effectively. On the other hand, the housing receiving the pantograph has a low overall height when retracted, is low-maintenance and is easy to install on the roof of the vehicle. The complex dome mount realized in the prior art can be completely dispensed with. On the other hand, the solution according to the invention can be easily integrated into the dome structures of existing vehicles.

The invention will be illustrated in more detail in an exemplary embodiment with reference to the drawings.

Show it: Fig. 1 is a perspective view of the invention

Pantograph assembly with the main components cover, cover roof, insulator and pantograph head,

2 is a sectional view of the pantograph according to the invention in the extended state according to line A-A of FIG. 1,

3 is a sectional view of the pantograph according to the invention in the retracted state along line A-A of FIG. 1,

4 shows the basic principle of the lifting device for normal lifting heights,

5 shows a section through two cover segments connected by cable,

Fig. 6 is a plan view of FIG. 5 with a schematic representation of the

Cable attachment,

Fig. 7 is a plan view of the electromechanical drive in the form of a

Chain drive for the lifting device,

8 is a view of the rocker with contact strip,

9 is a plan view of FIG. 8,

10 shows a section through the rocker body according to line C-C of FIG. 8,

11 shows a schematic representation of the height variable

Cable routing between insulator / pantograph and vehicle connection point,

Fig. 12, the cable guide with gas spring according to Fig. 1 1 and 13 shows the cable guide with gas tension spring according to FIG. 11.

As shown in FIG. 1, a streamlined housing 3 with a base frame 4 is mounted on the roof 1 of a high-speed vehicle 2. This housing 3 can be part of a dome structure on the vehicle roof, but it can also be mounted directly on the roof. According to FIG. 2, the housing 3 is composed of five telescopically inserted, tubular circumferential cover segments 5, each of which the inner cover segment is supported and guided on the outer one. The inner cover segment is also designed as an outwardly curved cover roof 6 and covers the housing 3. A trough 7 is formed in the center of the arched cover roof 6 and an opening 8 is provided in the center thereof. On the inner cover roof 6, a roof frame 9 is fastened with an opening 10 of an insulator support 12 corresponding to the opening 8, through which an insulator 11 can be guided. The insulator 11 rests on the insulator support 12, which carries a spindle nut 13 at each end symmetrically to the insulator axis B-B. A spindle 16, which runs perpendicular to the roof frame 9 and is driven by an electric motor 14 via a gear transmission 15, engages in the spindle nut 13. The rotary movement of the motor is transmitted via the gear transmission 15 to the spindle 16, which converts the rotary movement into a vertical lifting movement and thus extends and retracts the insulator carrier 12 with the insulator 11 through the opening 8.

Electric motor 14, spindle 16, spindle nut 13 and gear transmission 15 form a high-frequency drive 71.

As can be seen in FIGS. 5 and 6, each of the cover segments 5 has a lower, L-shaped stop-like bend 17 directed into the interior of the housing and an upper bend 18 also directed towards the inside. The lower bend 17 has a leg slightly longer than the upper bend 18, which serves as a stop for the inner cover segment. In the area of the lower bend 17, a recess 19 is formed on the inside of the cover segment 5, which extends along the inner circumference of the cover segment. The cover segments 5 consist of a fiber composite material, for example GRP, which is reinforced with inserts in the region of the recess 19. The upper bend 18 is provided with a sealing lip 70 which seals the space between the inner and outer cover segment 5 against moisture. A deflection device 20, consisting of a cable guide 21 and roller 22, is positioned on the inside in this part of the recess 19.

On the outside, a suspension plate 23 is anchored to the cover segment 5 approximately above the axis of rotation of the sliding roller 22. In the case of two nested cover segments 5, the cable guide 21 is approximately perpendicular to the mounting plate and is arranged upstream of the sliding roller 22. The castor 22 is rotatably mounted on the insert. This ensures a safe rope deflection.

As shown in FIG. 6, one end of a rope 24 is captively suspended in the mounting plate 23. This rope 24 initially runs from the suspension plate 23 in a vertical alignment to the rope guide 21 and is deflected by the slide roller 22 approximately horizontally onto a traction device 25 fixed tangentially on the circumference of the outer cover segment. The traction device 25 comprises a tension spring 26 and an anchoring part 27, which is also fixed to an insert.

Four such cables consisting of rope 24, suspension plate 23, rope guide 21, slide roller 22 and pulling device 25 are evenly distributed over the circumference of the cover segments and each connect an inner cover segment to an outer cover segment.

The roof frame 9 has at its ends assigned to the cover segments 5 in the interior of the housing 3 fastening tabs 28 for fastening the lifting devices 29 with which the cover roof 6 is raised or lowered (see FIGS. 2 and 3). The lifting device 29 is composed of four scissor-like support frames 30 together, of which a support frame is formed from two lower support arms 31 and 32 and an upper support arm 33. The two lower support arms 31 and 32 are provided with a sliding bearing 34. The upper support arm 33 is pivotally articulated at one end to the fastening tab 28 of the roof frame 9, the other end is connected to the lower support arm 31 via a joint 35. The other lower support arm 32 is connected via a joint 36 to the upper support arm 33 by a lever arm 37, which forms a further sliding bearing 38 with the upper support arm 33 thereon. The two joints 35, 36 and sliding bearings 34 and 38 thus include a parallelogram. In the vertical alignment of the upper support arm 33 fixedly attached to the roof frame 9, there is a fastening tab 39 on the base frame 4, on which the support arm 31 is pivotally but fixedly fixed (see FIG. 2). This lifting device is particularly suitable, for example, for large extension heights, preferably up to 2.8 m above the vehicle roof height. For the compensation of normal lifting heights, for example the high-speed rail network, the lifting device 29 consists of at least two support frames 30, which consists of a support arm 33 pivotably articulated on the roof frame 9 and a support arm 32 likewise articulated on the base frame 4. The support arm 32 is articulated at its other end to the support arm 33,

4, in principle, the support arm 32 has the length L and the support arm 33 has the length 2L. The articulation point of the support arm 32 on the support arm 33 divides it into two lever arms of equal length and the end of the support arm 33 can be moved linearly relative to the pivot point of the support arm 32 on the base frame 4, so that the support arm 33 stands up and the cover roof 6 is raised.

7 shows an electromechanical drive 40 mounted on the base frame 4.

This drive has two guide tracks 41, which are positioned along the long sides of the cover segments 5 and are located parallel to one another, for receiving a chain hoist 43 guided between two sprockets 42 with shafts 42. Both chain hoists 43 are driven by a chain drive 44 moved by an electric motor. The movement of the chain drive 44 is transmitted to the shafts 42 of the two chain hoists 43. The lower end of the support arm 32 is connected on both sides to the chain hoist 43, is supported in the guideway 41 and can thus be displaced linearly when the chain drive 44 moves along the guideway 41. Since the other lower support arm 31 is held stationary, when the lower end of the other support arm 32 is moved, the entire support frame 30 can be continuously raised or lowered via the joints and displacement bearings. The chain drive 44 drives the parallel chain hoists 43 synchronously, so that the lifting or lowering of all four support frames 30 takes place evenly. This lifting or lowering movement is transmitted to the cover roof 6. When the cover roof 6 is lifted, the individual cover segments 5 are telescopically extended from the inside outward against their respective spring cables. When lowering, the cover segments 5 are retracted from the outside inwards by the spring cables. When retracting, the support arms of the support frames 30 fold inwards. The roof frame 9 of the cover roof 6 rests on the base frame 4 of the housing 3 when the support frames 30 are completely retracted.

The height of the cover segments 5 corresponds approximately to the insulator height, the insulator head protruding from the opening 8 (see FIG. 5).

The insulator 11 is rigidly attached to the insulator support 12. As shown in FIGS. 8 and 9, the upper insulator flange 45 carries a rocker 46 with a streamlined rocker body 47, in which the contact strip 48 is mounted.

A spring-damper unit 49 is located between the contact strip 48 and the insulator flange 45 (see FIGS. 9 and 10). This spring-damper unit 49 is composed of two, one-piece levers 50, spaced apart approximately at the width of the contact strip 48, each having two mutually perpendicular, interconnected lever arms 51 and 52. Both lever arms 51 and 52 are rotatable together about a fixed pivot point Dp, the lever arm 51, which is somewhat longer than the lever arm 52, is pivotably articulated with its slightly angled end on the contact strip holder 53. The shorter lever arm 52 is attached at the other end to a tension spring 54 which is adjustably fixed on the insulator flange 45. A hydraulic rotary damper 55 is fastened between the two levers 50 located parallel to one another, the actuating member 56 of which engages in an elongated hole 57 machined in the lever 50. The tension spring 54 causes one

The force on the contact strip 48 causes the lever 50 to rotate, so that the slightly angled lever arm 51 performs a pivoting or rotating movement. This rotary movement is sustainably absorbed and damped by the rotary damper 55. The tension springs 54 have a very low stiffness. This spring-damper unit 49 only enables vertical deflection. The rigid attachment of the rocker body 47 to the insulator 11 ensures that the wind load is absorbed by the streamlined rocker body and only a very small aerodynamic portion of the contact strip is eliminated.

The rocker 46 is provided with horns 58 (FIG. 8), which can be adjusted to different rocker widths, for example 1950 mm and 1600 mm, by a pneumatic drive 59 mounted in the rocker body 47.

In the cover roof 6, as shown in principle in FIG. 1, there are flaps 60 which open inwards and are positioned in the longitudinal direction of the housing 3 and into which the horns 58 can dip when the rocker 46 is at 90 ° in the longitudinal direction of the housing 3 about its vertical Axis rotated and lowered.

The high-voltage cable 61 (see FIGS. 11-13), which is laid between the insulator 11 and the connection point (not shown) on the vehicle 2, runs in a spiral alignment approximately approximately around the elongated insulator axis toward the roof of the vehicle and is held by a cable pull 62. At the opening 10 of the insulator support 12, a roller seat 63 (FIG. 13) is flanged, with which a bearing block 64 is held. The bearing block 64 receives a shaft 65 with two rope pulleys 66 lying next to one another. A rope 67 is underneath each pulley 66 180 ° deflection, the two rope ends in vertical alignment lead to two deflection pulleys 68 attached to the base frame 4, which lead the rope ends of the rope 67 to a gas tension spring 69 of extremely great length. The cable 67 thus forms a cable pull 72 which is held under a tensile force which always keeps the high-voltage cable 61 taut when the lifting device 29 is extended and retracted.

The ropes 67 are made of non-conductive material, for example plastic.

The contact pressure acting on the contact strip 48 is a complex variable, which is subject to constant changes due to the vehicle speed, the wind intensity and direction, the position of the catenary chain guiding the contact wire and its pantograph, friction and wind-induced vibrations 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 work

compensated. The compensation takes place with an electromechanical drive, for example a chain drive, which compensates for height differences of the chain between 4.8 to 6.3 m and vertical chain oscillations with amplitudes> 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. Relative to this vertical movement taking place in the first control stage, the pantograph (isolator, rocker, cable) oscillates simultaneously in a second active control stage in a vertical stroke of max. ± 50mm in a frequency range up to 15Hz. The stroke movement of the second control stage is generated by a high-frequency actuator, for example an electromotive linear drive.

The high-frequency vibrations between contact wire and contact strip are absorbed and damped in a quasi-simultaneous further step by decoupling the forces between contact strip and pantograph. List of reference numerals:

1 roof

2 high speed vehicle

3 housing

4 base frames

5 cover segments

6 cover roof

7 well in 6

8 opening in 6

9 roof frames

10 Opening in insulator carrier

11 isolator

12 insulator supports

13 spindle nut

14 electric motor

15 gear transmission

16 spindle

17 lower deviation from 5

18 upper deviation from 5

19 deepening

20 deflection device

21 rope guide

22 roller

23 suspension plate

24 rope

25 drawbar

26 tension spring

27 anchoring part

28 fastening straps

29 lifting device

30 frames

31 lower support arm

32 lower support arm

33 upper support arm

34 sliding bearings

35 joint

36 joint

37 lever arm

38 sliding bearing

39 fastening straps

40 electromechanical drive

41 guideway

42 waves 43 chain hoist

44 chain drive

45 insulator flange

46 seesaw

47 rocker body

48 contact strip

49 spring damper unit

50 levers

51 lever arm

52 lever arm

53 Contact strip holder

54 tension spring

55 rotary damper

56 actuator

57 slot in 51

58 horns

59 pneumatic drive

60 flap in 6

61 high-voltage cables, conductors

62 cable

63 reel seat

64 bearing block

65 wave in 65

66 pulley

67 rope

68 pulley

69 Throttle cable

70 sealing lip

71 high-frequency drive

72 cable

B-B isolator axis

L length of the support arm 32

Dp pivot point

-13 sheets of drawings

Claims

claims

1.Device for the controlled current take-off between a contact wire and a track-bound, electrically operated high-speed vehicle, with a streamlined housing arranged on the vehicle roof for receiving a lifting device, to which a rocker-bearing rocker of a pantograph is attached, an insulator for holding and Insulating the current collector and a conductor for discharging the current drawn by the current collector, characterized in that the housing (3) made of telescopically guided inner and outer cover segments (5) with an integrally molded cover roof (6 ) is assembled and the cover segments (5) are inserted at different stroke heights into and out of at least two lifting devices (29) which are arranged symmetrically to the isolator axis (BB) within the cover segments and which can be actuated with an electromechanical drive (40) lying horizontally to the isolator axis extendable ar are arranged, wherein the lifting devices (29), the conductor (61) and other internals (40, 13, 14, 15, 16) are vertically enclosed by the cover segments (5), and that the rocker (46) with The contact strip (48) and insulator (11) can be moved vertically and rotated about the axis (BB) relative to the lifting heights of the cover segments (5) by a high-frequency drive (71), and that between the contact strip (48) and the insulating flange ( 45) a spring-damper unit (49) is arranged for decoupling the vertically acting forces and for damping the contact force fluctuations, and that the conductor between the insulator and the vehicle-side connection point is designed as a high-voltage cable (61) adjustable to different lifting heights.

2. Device according to claim 1, characterized in that the

Housing (3) is part of a dome structure on the vehicle roof.

3. Apparatus according to claim 1 and 2, characterized in that the cover segments (5) are each provided with an inwardly shaped upper and lower stop-like bend (17, 18).

4. The device according to claim 1 to 3, characterized in that the inner and outer cover segments (5) with each other by at least four circumferentially evenly distributed, approximately parallel to the insulator axis (BB), against spring force tensioned, simply deflected ropes (24) are connected, the cables (24) being arranged between the outer and inner cover segment (5) in such a way that they are each attached with one end to the outer circumference of the inner lower cover segment (5) and the other end via one deflection device (20) fastened on the inner circumference of the lower outer cover segment (5) are guided to a traction device (25) which is fixed at the circumference of the outer cover segment (5).

5. Apparatus according to claim 1 to 3, characterized in that the inner and outer cover segments (5) with each other by around the circumference of the cover segments (5) evenly arranged, approximately parallel to the Isloatorachse (BB), tensioned against spring force , multiple deflected ropes (24) are connected, the ropes (24) being arranged between the outer and inner cover segment (5) in such a way that their one end can be hung on the outer circumference of the inner lower cover segment (5) attached and the other end are guided via a deflection device (20) attached to the inner circumference of the lower outer cover segment (5) to a traction device (25) fixed daily at the circumference of the outer cover segment (5).

6. The device according to claim 1 to 5, characterized in that the lower bend (17) is L-shaped, wherein in the retracted state of the cover segments (5) each bend the inner cover segment (5) on the of the outer cover segment (5) is supported.

7. The device according to claim 1 to 6, characterized in that the

Deflection device (20) is formed from a sliding roller (22) and a cable guide (21) arranged upstream of the sliding roller.

8. The device according to claim 1 to 6, characterized in that the

Traction device (25) is formed from a tension spring (25) and anchoring part (27) or cable winch.

9. The device according to one or more of the preceding claims, characterized in that on the inside on the outer cover segment (5) is formed a recess (19) in which the deflection device (20) and the traction device (25) are arranged.

10. The device according to one or more of the preceding claims, characterized in that the upper bend (18) of the outer cover segment (5) is provided with a sealing lip (70) against the circumference of the respective inner cover segment ( 5) fits snugly.

11. Device according to one of the preceding claims, characterized in that the cover segments (5) preferably have approximately the same height.

12. Device according to one of the preceding claims, characterized in that the height of the cover segments (5) corresponds approximately to the insulator height.

13. The device according to one or more of the preceding claims, characterized in that the cover segments (5) and the cover roof (6) consist of GRP or CFRP composite materials.

14. The apparatus according to claim 1, characterized in that the

Lifting device (29) is formed from at least two support frames (30), each of which is composed of a support arm (33) pivotably articulated on a roof frame (9) connected to the cover roof (6) and a lower support arm (32) from which the lower support arm (32) with its one end in the alignment of the mounting bracket (28) of the support arm (33) on the base frame (4) of the housing (3) is pivotally received and pivotally articulated with its other end on the support arm (33) , the latter being arranged so as to be linearly displaceable relative to the lower support arm (32).

15. The apparatus according to claim 14, characterized in that the

Support arm (33) has twice the length of the lower support arm (32) and the lower support arm (32) is articulated on the support arm (33) such that the latter is divided into two lever arms of equal length.

16. The apparatus according to claim 1, characterized in that the lifting device (29) from at least two scissor-like support frames (30) is formed, which is composed in each case of an upper support arm (33) pivotably articulated on a base frame (4) connected to the cover roof (6) and two lower support arms (31, 32), one of which has a lower support arm (31) in the alignment of the mounting bracket (28) of the upper support arm (33) on the base frame (4) of the housing (3) pivotally received and the other lower support arm (32) is arranged linearly displaceable to the former.

17. The apparatus according to claim 1 and 16, characterized in that the upper support arm (33) and the lower stationary support arm (31) by a joint (35) and the linearly displaceable lower support arm (32) with the upper support arm (33) a joint (36) and a sliding bearing (38) are connected by a lever arm (37), the two lower support arms (31, 32) being connected to one another by a further sliding bearing (34) such that the joints (35, 36 ) and the sliding bearings (34, 38) form a parallelogram.

18. The device according to one or more of the preceding claims, characterized in that the electromechanical drive (40) is designed as a rope, spindle or chain drive (44) which is aligned parallel to one another, along the longitudinal walls of the cover segments (5th ) has extending guideways (41) for a revolving train (43) in which the lower linearly displaceable support arm (32) of the lifting devices is fastened as part of the train.

19. The device according to one or more of the preceding claims, characterized in that the support arms (33) of the extended support frames (30) have an inward or outward inclination.

20. The device according to one or more of the preceding claims, characterized in that the support arms (33,31,32) of the support frames (30) in the retracted state are arranged towards each other inwards.

21. The device according to one or more of the preceding claims, characterized in that the lifting device (29) has a lifting height above the vehicle roof of 650 mm to 2.8 m.

22. The apparatus according to claim 1, characterized in that the cover

Roof (6) in the direction of travel, flaps (60) spaced apart from one another in rocker width.

23. The device according to claim 1 and 22, characterized in that the

The rocker (46) can be rotated by at least 180 ° and the horns (58) of the rocker (46) are immersed in the flap opening of the flaps (60) when retracted.

24. The device according to claim 1, characterized in that the rocker

(46) is of variable width by means of a pneumatic drive (59) arranged in the rocker body, which retracts or extends the horns (58).

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

26. The apparatus according to claim 1, characterized in that the rocker

(46) and insulator (11) are firmly connected to one another and the contact strip (48) in the rocker body has a single degree of freedom for vertical movement.

27. The apparatus according to claim 1, characterized in that the

High-voltage cable (61) is a flexible cable which is aligned with at least one cable (72) running vertically and under tension between a roller holder (63) attached to the insulator support (12) and deflection rollers (68) attached to the base frame (4) Insulator axis (BB) is arranged helically.

28. The apparatus according to claim 1 and 27, characterized in that the roller holder (63) has at least two rollers (66) arranged next to one another, via which in each case a rope (67) with deflection to an outside of the axis of the isolator axis (BB) on the base frame (4) attached gas traction spring (69) of great length, the gas traction spring (69) for applying the tensile force to the cable pull (72) being arranged between the two cable ends of the cable (67).

29. The device according to claim 1 and 25, characterized in that the

Spring-damper unit (49) includes tension springs (54) with extremely low rigidity and a rotary damper (55).

30. A method for controlled current draw between a contact wire and a track-bound, electrically operated high-speed vehicle, in which the pantograph held by the insulator is raised or lowered vertically with a contact strip and a rocker, comprising the steps

a) electromechanical compensation of the height differences of the

Catenary in a first active control stage by converting a horizontal movement into a vertical movement; b) simultaneous movement of the pantograph relative to the vertical movement of step a) in an oscillating vertical stroke in a second active control stage by a high-frequency drive and

c) simultaneous absorption and damping of high-frequency vibrations for steps a) and b) by decoupling the forces between the contact strip and the pantograph.

31. The method according to claim 30, characterized in that

Differences in height from 650 mm to 2.8 m from the vehicle roof can be compensated.