JP3784661B2 - Low noise current collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a railway vehicle current collector that travels at a high speed, and more particularly to a current collector that is suitable for reducing noise and overhead wire wear when traveling at a high speed of 300 km / h or higher.
[0002]
[Prior art]
Since the aerodynamic noise accompanying the increase in the speed of the railway vehicle increases in proportion to the sixth to eighth power of the speed, it rapidly increases as the vehicle speed increases. On the other hand, the demand for environmental conservation is expected to increase in the future. For this reason, it is the main aerodynamic sound source in a vehicle traveling at high speed, and the current collector which has come to dominate the limitation of the high speed is now required to reduce the maximum noise. Further, from the viewpoint of reducing the life cycle cost, it is required to reduce the wear of the overhead wire.
[0003]
Japanese Unexamined Patent Publication No. 6-315202 is known as a high-speed vehicle current collector that meets such demands. This high-speed vehicle current collector is excellent in controllability and response of tracking of the overhead line, and in order to keep the contact force to the overhead line during high-speed traveling properly and to reduce noise generation, And a driving mechanism for moving the current collecting member, an insulator for connecting the current collecting member and the driving mechanism (referred to as an insulating column in the present invention), and the driving mechanism. The power collecting member collects the electric power collected by the current collecting member and conducts the electric conduction toward the load side. As another embodiment, a conductor is provided in the hollow portion in the insulator, that is, the current collecting member is supported by the conductive cable head, and the parallel arrangement of the insulator and the insulating coated conductor is avoided, and the conductor is integrated. There has been proposed a structure for forming an insulator.
[0004]
[Problems to be solved by the invention]
As a first problem, each of the high-speed vehicle current collectors proposed in the above specification is provided with a drive mechanism that is directly connected to the lower portion of the insulator, and a gap between the roof of the vehicle and the vehicle limit. In the case where the device is arranged in the above, a sufficient space cannot be allocated to the drive mechanism, and therefore, a sufficient stroke necessary to follow the vertical displacement of the overhead line installed on the ground side is given to the current collecting member. I couldn't.
[0005]
As a second problem, the drive mechanism proposed in the above specification has a direct acting cylinder structure driven by fluid pressure, and when the fluid pressure is lost or the control device fails. This high-speed vehicle current collector will not operate. This means that the supply of electric power to the vehicle is cut off, which hinders the running of the vehicle. As a countermeasure, it is possible to avoid this situation stochastically by installing multiple current collectors on the roof of the formation vehicle and passing the bus, but as an extreme example, the fluid pressure of all current collectors is lost. Or if all the control devices are considered to have failed.
[0006]
An object of the present invention is to provide a railway vehicle current collector that improves the performance of following an overhead line, is capable of handling a vehicle traveling at a low speed, and ensures traveling reliability.
[0007]
[Means for Solving the Problems]
In order to solve the first problem described above, the present invention first divides the drive mechanism into two parts, and provides the first drive mechanism and the second drive mechanism, and performs the role sharing of the tracking performance to the overhead wire. , Enlarge its stroke.
[0008]
The overhead wire is suspended at equal intervals by a column and a hanger, and hangs within the range of the installation standard by its own weight except for the fulcrum. In addition, the fulcrum height of the column also changes vertically within the range of the installation standard due to the influence of structures such as tunnels and iron bridges. When the irregularities of these overhead lines at a speed of about 350 km / h are expressed in terms of frequency and stroke, “up and down the fulcrum” is “about 0.01 Hz, about 500 mm ”, and “sagging between the fulcrums” is “about 2”. 0.0 Hz, about 25 mm 0- P ”,“ hanging between hangers ”is“ about 20.0 Hz, about 1 mm 0- P ”, and“ corrugated wear of overhead wire ”is“ about 30-40 Hz, about 0.1 mm ” 0- P ". For these irregularities, the first drive unit is a mechanism that can handle low frequency and large stroke, is responsible for "up and down fulcrum", and the second drive unit can handle "sagging between fulcrum", For “hanging between hangers” and “corrugated wear of overhead wire”, the “spring” structure provided between the hull and the sliding plate is used, and a structure similar to the so-called three-mass pantograph structure is used. It is configured so that it can handle irregularities on the side.
[0009]
Furthermore, the second problem is that when the drive source such as the fluid pressure of the drive system is lost or the function of the current collector is stopped due to a failure of the control device, an electric motor or fluid pressure is used as the drive source. By providing a spring structure in parallel with a drive unit such as a cylinder according to the above, it is possible to ensure a passive drive but a minimum drive source, to enable the vehicle to travel at low speed, and to ensure driving reliability Constitute.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of a low noise current collector, and FIG. 2 is a cross-sectional view showing an internal structure in a state where a drive mechanism of the low noise current collector is extended. FIG. 3 is a cross-sectional view showing an internal structure in a state where the drive mechanism of the low-noise current collector is folded. 4 is a top view of FIG. 1, FIG. 5 is a sectional view taken along the line II in FIG. 1, and FIG. 6 is a sectional view taken along the line II-II. 7 shows a cross-sectional view taken along the line III in FIG. 6, and FIG. 8 shows a cross-sectional view taken along the line IV in FIG.
[0011]
Reference numeral 1 denotes an overhead wire, 2 denotes a sliding plate, and 3 denotes a boat body in which the sliding plate 2 is incorporated via a spring 2a. 4 supports the hull 3 and secures electrical insulation between the hull 3 and the drive mechanism of the low-noise current collector, and holds the high-voltage flexible insulating coated conductor 201 in the hollow portion inside. Insulated struts (hereinafter referred to as insulators). Reference numeral 5 denotes an upper frame for fixing and holding the insulator 4, and reference numeral 6 denotes an intermediate frame. A second drive mechanism is configured and attached between the upper frame 5 and the intermediate frame 6.
[0012]
The second drive mechanism is composed of a dual link actuator 7 and a linear guide shaft 8 having a spring 8a coaxially arranged. The upper frame 5 is guided by the linear guide shaft 8 with respect to the intermediate frame 6 and is moved up and down in the vertical direction. It is the composition to do. This up / down driving force is generated by the dual link actuator 7. The dual link actuator 7 decelerates the rotational motion of the electric motor 71 by the speed reducer 71 a and divides the motion in both the left and right rotational directions and is transmitted to the left and right crank arms 72. Further, the electric motor 71 is fixed to the intermediate frame 6, and the crank arm 72 and the crank rod 73 are coupled to each other by a rotating shaft 72a so as to be rotatable in the illustrated plane. Further, the upper end portion of the crank rod 73 is coupled to a bracket 73b by a rotation shaft 73a so as to be rotatable in the illustrated plane, and the bracket 73b is fixed to the upper frame 5. If the controlled electric power is supplied to the electric motor 71 in the second drive mechanism having such a configuration, the upper frame 5 moves up and down with respect to the intermediate frame 6. As for the details of the dual link actuator 7, for example, the one disclosed in the specification of JP-A-11-290556 can be adopted.
[0013]
FIG. 2 shows an example of covers 301, 302, 303 covering the first drive mechanism and the second drive mechanism of the railway vehicle current collector, and a cover sliding portion 301 a and an insulator sliding portion 302 a. As shown in FIG. 2, the cover is divided into a plurality of covers 301, 302, and 303, and the divided covers are slidable with respect to each other by the cover sliding portion 301a and the lever sliding portion 302a. It has become.
[0014]
The power capture will be described with reference to FIG. The electric power taken in by contact with the overhead wire 1 is transmitted from the sliding plate 2 to the boat body 3 via a conductor (not shown). The boat body 3 and the insulator 4 are fixed, and the conductor 201a of the high-voltage flexible insulating covering conductor 201 is embedded in a hollow portion provided inside the insulator 4, and the upper end portion of the conductor 201a is the boat. It is fixed to the body 3. A high-voltage flexible insulating covering conductor 201 is provided below the insulator 4 and has a conductor continuous with the conductor 201a. Since there is a switching portion of the insulating material at the lower part of the insulator 4, a structure for performing electric field relaxation treatment (not shown) is adopted. Electric power is taken into a vehicle power unit (not shown) via the high-voltage flexible insulating coating conductor 201, so that the vehicle travels at a high speed.
[0015]
Next, the holding relationship between the intermediate frame 6 and the lower frame 9 will be described. The intermediate frame 6 is held by the lower frame 9 via the first drive mechanism, and is configured to move up and down while maintaining a parallel state. The first drive mechanism mainly includes links 10 and 10a, a linear guide shaft 11, a lever 12, a cam 13, an air servo cylinder 14, a spring 15, and a wire 16. The links 10 and 10a are rotatably held in a plane shown in the drawing by rotating shafts 101, 102, 103, and 104. The link 10 is rotatably held in the plane shown in the drawing by the rotating shaft 103 and the central axis is fixedly held. The linear guide shaft 11 is fixed to the lower frame 9, and the link 10 is held by the rotation shaft 102 so as to be rotatable and slidable in the plane of the drawing with respect to the linear guide shaft 11. Further, the link 10a is half the length of the link 10, and the center axis of the link 10a is rotatably held within the plane of the drawing by the rotation shaft 104 with respect to the center point in the length direction of the link 10. Further, the other end of the link 10a is fixed to the rotary shaft 101, the relationship with the lower frame 9 is rotatable within the plane shown in the figure, and the central axis is fixedly held. In the positional relationship of the central axes of these rotation axes 101, 102, 103, and 104, if the triangle formed by the center points of the rotation axes 101, 102, and 104 is configured to be an isosceles triangle, the center point of the rotation axis 103 Moves vertically in accordance with the rotation and sliding movement of the links 10 and 10a in the illustrated plane, and always exists at the upper part of the vertical line of the center point of the rotation shaft 101. You can move up and down in parallel.
[0016]
Further, the generation and transmission relationship of the driving force by the first driving mechanism will be described. The generation source of the driving force is the air servo cylinder 14 and the spring 15. The spring 15 is configured as a tension coil spring in a direction in which the intermediate frame 6 rises due to a tensile action, and the air servo cylinder 14 is configured in a direction in which the intermediate frame 6 descends due to air pressure injection. First, transmission of the driving force of the spring 15 will be described. One end of the spring 15 is fixed to the lower frame 9. The other end is fixed to the cam 13 via a wire 16. The cam 13 is fixed to the rotary shaft 101, and is rotatable with respect to the lower frame 9 within a plane shown in the drawing, and the central shaft is fixedly held. With this configuration, the tensile force of the spring 15 causes a rotational motion of the link 10a, and the link 10 rotates in the illustrated plane around the rotational shaft 103 and rotational sliding motion in the illustrated plane of the rotational shaft 102. Is converted into an ascending movement. On the other hand, transmission of the driving force of the air servo cylinder 14 will be described. One end of the air servo cylinder 14 is rotatable on the lower frame 9 via a rotating shaft 14a in a plane shown in the figure, and the central shaft is fixedly held. The other end is rotatable with respect to the lever 12 via the rotation shaft 12a in the illustrated plane, and the central shaft is fixedly held. The lever 12 is fixed to the rotary shaft 101, and the central axis is fixedly held to the lower frame 9. In this configuration, when air pressure is injected into the air servo cylinder 14, the rotating shaft 101 rotates via the lever 12, and the link 10 a rotates in a downward direction, so that the link 10 is centered on the rotating shaft 102. It rotates and slides in the plane shown in the drawing, and further moves in the direction in which the link 10 is folded around the rotation shaft 103. This causes the intermediate frame 6 to move downward.
[0017]
Furthermore, the damper 17 can be provided as needed. One end of the damper 17 is rotatable with respect to the lower frame 9 with respect to the lower frame 9 by a rotation shaft 17a, and the center shaft is fixedly held. The lever 18 is fixed to the rotating shaft 101, and is held rotatably with respect to the lever 18 in the plane shown in the figure with respect to the other end of the damper 17 via the rotating shaft 18a.
[0018]
In the first drive mechanism configured in this way, the intermediate frame 6 can move in the downward direction by injecting air pressure into the air servo cylinder 14 and can move in the upward direction by the tensile force of the spring 15. The hull 3, the sliding plate 2, and the spring 2 a can be made to follow the fluctuations in the position of the overhead line by actively controlling the amount of air injected into the bridge so that the contact force between the overhead line 1 and the sliding plate 2 is substantially constant. I can do it. Further, when necessary, the generated drive force and load force of the air servo cylinder 14 are harmonized by the damper 17 provided, and a smooth ascending / descending motion can be realized.
[0019]
Also, when the pressure source of air pressure to the air servo cylinder 14 is lost or the control device for controlling injection fails, the air servo cylinder 14 is opened and the driving force is made zero by opening this control circuit. To do. In this case, the force that pushes down the intermediate frame 6 is transmitted from the overhead wire through the sliding plate 2, the spring 2a, the boat body 3, the insulator 4, the upper frame 5, the dual link actuator 7, the linear guide shaft 8, and the spring 8a. The balance between the push-down force and the push-up force by the spring 15 causes the boat body 3 to move in the same manner as a conventional passive pantograph in which the hull 3 is raised and lowered, and even if the active control device of the current collector fails, the speed is low. Thus, it is possible to ensure the vehicle traveling reliability.
[0020]
The second and third embodiments of the present invention will be described with reference to FIGS. FIG. 9 is a diagram in which the dual link actuator 7 which is the second drive mechanism of FIG. FIG. 10 is a diagram in which the dual link actuator 7 which is the second drive mechanism of FIG. 9 includes a drive shaft 401a and a stator 401b. The drive shaft 401a is fixed to the upper frame 5, and the stator 401b is fixed to the intermediate frame 6. The drive shaft 401a moves up and down in the vertical direction by supplying power controlled by the control device to the stator 401b. 10 includes a cylinder shaft 402a and a cylinder body 402b. The cylinder shaft 402a is fixed to the upper frame, and the cylinder body 402b is fixed to the intermediate frame 6. The cylinder shaft 402a moves up and down in the vertical direction by supplying air controlled by the controller to the cylinder body 402b. The shaft 8 on which the spring 8a is arranged coaxially and the first drive mechanism are the same as in the first embodiment. With this configuration, the second and third embodiments perform the same driving action as the first embodiment, and the reliability of vehicle travel at low speed even when the active control device of the current collector fails. Can be secured.
[0021]
An enlarged view V of the cover sliding portion 301a shown in FIG. 2 is shown in FIGS. FIG. 14 shows an enlarged view VI of the insulator sliding portion 302a. The covers 301, 302, and 303 have a combination in which the side close to the boat body 3 has a large diameter and the side close to the roof has a small diameter. This is for attaching the packing 304 to the cover sliding part 301a and preventing rainwater and dust from entering from the cover sliding part 301a. However, if the sealing degree of the packing 304 is increased for waterproofing, the air inside the cover is compressed and expanded by expansion and contraction of the cover, so that back pressure is generated and the movement of the cover is hindered. Accordingly, air can be circulated through the packing 304, but it is required to have a function of preventing rainwater and dust from entering and having low sliding resistance.
[0022]
FIG. 11 shows the detailed structure of the packing 304, FIG. 12 is a sectional view taken along the line VII-VII, and FIG. 13 is a sectional view taken along the line VIII-VIII. The packing 304 has a space band 304d in the middle, and has a double sliding structure. The sliding portion has a structure in which raised hair 304f having a spherical protrusion 304c on the head is planted in a zigzag manner on the base 304b. Further, the base 304b is fixed to the cover 301 via an elastic packing 304a. This stretchable packing 304 a is configured to press the spherical protrusion 304 c uniformly against the sliding surface of the cover 302. As shown in FIG. 12, the sliding surface with the cover 302 becomes an aggregate of point contacts at the top portion 304g of the spherical protrusion 304c, and a cover sliding portion with low sliding resistance is obtained because the contact area is small.
[0023]
FIG. 13 shows a cross-section VIII-VIII of the raised portion 304f. The raised portion 304f is arranged in a zigzag shape, and has a space that winds around. The air can be ventilated by generating an air current as shown by 304e through this space. However, since rainwater and garbage have a specific gravity greater than that of air, they collide with the raised portions 304f to produce a filter effect, and as a result, brackish water separation becomes possible. The reason why the space band 304d is provided in the intermediate part is that if rainwater or dust penetrates the first raised nap 304f, the dynamic pressure is released and once converted to an intermediate static pressure to the second raised nap 304f. This is the effect of the so-called labyrinth, which weakens the invasion action.
[0024]
Next, FIG. 14 shows a detailed sectional view of the insulator sliding portion 302a. 4 is an insulator and 301 is a cover. A packing 305 is provided on a sliding surface with the insulator 4, and the packing 305 is fixed to the cover 301. The insulator sliding portion 302a has a structure in which the insulator 4 is fixed to the upper frame 5 and moves up and down in the vertical direction by the second drive mechanism. Since the cover 301 is fixed to the intermediate frame 6, the insulator 4 moves up and down relative to the cover 301. Since this insulator sliding portion 302a has a shorter circumference than the cover sliding portion 301a and the insulator sliding portion 302a exists at the position of the receiving port with respect to rainwater, a watertight sliding packing is used for the packing 305. To do.
[0025]
15, 16, and 17 are conceptual diagrams of the active control system. FIG. 15 is a view when a contact force detecting means 2b between the overhead wire 1 and the sliding plate 2 is provided between the sliding plate 2 and the spring 2a. FIG. 16 is an overhead wire between the spring 2a and the boat body 3. It is a figure at the time of providing the contact force detection means 2b of 1 and the sliding board 2. FIG. In FIG. 17, a signal relating to contact force is transmitted from the contact force detection means 2b to the control device 451 through the optical fiber 2c, and is processed in the control device 451. In the controller 451, the circuits 2e and 2f are actively adjusted based on the calculation result so that electricity or air from a power source or air source (not shown) is actively adjusted so that the contact force between the overhead wire 1 and the sliding plate 2 becomes substantially constant. Thus, it is sent to the first drive mechanism and the second drive mechanism to drive it. Further, an emergency control device 452 is provided in case the control device 451 should fail. This emergency control device operates by receiving a failure signal of the control device 451 by the circuit 2d, and controls and drives the first drive mechanism and the second drive mechanism to the folding position through the circuits 2g and 2h. The body 3 is urgently pulled out of contact with the overhead wire 1 and lowered.
[0026]
FIG. 18 shows a hooking device 500. This device is for allowing the folding position to be maintained even when the drive source by electricity or air is lost when the first driving mechanism and the second driving mechanism are lowered to the folding position. Reference numeral 501 denotes a hook pin, 502 denotes a hook rod, 502a, 502b and 502c denote rotating shafts, 504 denotes an outer cylinder, and 505 denotes a hook spring. The hook pin 501 is fixed to the upper frame 5. The hook 502 is engaged with the rotary shaft 502 a so as to be rotatable in the plane shown in the figure, and the rotary shaft 502 a is fixed to the lower frame 9. One end of the hanging cylinder 504 is engaged with the hook rod 502 and the rotating shaft 502b so as to be freely rotatable in the drawing plane, and the other end is engaged with the rotating shaft 504a and is rotatably fixed to the lower frame 9 within the drawing plane. Yes. Further, the hook spring 505 is engaged with a hook rod 502 and a rotating shaft 502c so as to be rotatable in the illustrated plane, and the other end is engaged with the rotating shaft 505a so as to be rotatably fixed to the lower frame in the illustrated plane. An inclined surface 502d and a notch 502e are provided at the tip of the hooking rod 502. The operation of the hooking device 500 configured as described above will be described. When the first drive mechanism and the second drive mechanism are lowered to the folding position, the hook pin 501 fixed to the upper frame 5 hits the inclined surface 502d at the tip of the hook rod 502 so as to push it away. Descend. In this case, the upper frame 5 is fixed to the lower frame 9 via the hook pin 501 by rotating the hook rod 502 against the tension of the hook spring 505 to reach and engage with the notch 502e. . Next, when releasing this fixing, compressed air is supplied to the overhanging cylinder 504 from an air source (not shown). When the hooking rod 502 is rotated against the tension of the hooking spring 505 by the generated force of the outer cylinder 504 and the engagement between the notch 502e and the hooking pin 501 is released, the first driving mechanism and the second driving mechanism are moved. The upper frame 5 and the intermediate frame 6 are raised by the tension of the built-in spring 8a and spring 15.
[0027]
【The invention's effect】
According to the present invention described above, a low-noise current collecting device can be obtained by a simple shape including a sliding plate, a hull, an insulator, a cover, and a lower frame, and the drive mechanism is a first drive mechanism. And a second drive mechanism, and by incorporating a link mechanism into the first drive mechanism, a large stroke can be obtained, and a device that can sufficiently follow the vertical displacement of the overhead wire with a size that fits in the space on the roof of the vehicle is obtained. I was able to. Moreover, when the fluid pressure and electric power which are the drive source of an apparatus are lost, or when a control apparatus breaks down, the apparatus which can be run at a low speed in a passive state was able to be obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing an external appearance of a low noise current collector of the present invention.
FIG. 2 is a cross-sectional view showing an internal structure in a state in which a drive mechanism of the low-noise current collector according to the first embodiment of the present invention is extended.
FIG. 3 is a cross-sectional view showing an internal structure in a state in which a drive mechanism of the low-noise current collector according to the first embodiment of the present invention is folded.
FIG. 4 is a plan view showing the appearance of the low noise current collector of the present invention.
FIG. 5 is a cross-sectional view taken along line II of FIG. 1 of the low-noise current collecting apparatus showing the first embodiment of the present invention.
6 is a cross-sectional view taken along the line II-II of FIG. 1 of the low-noise current collector showing the first embodiment of the present invention.
7 is a cross-sectional view taken along the line III-III of FIG. 6 of the low noise current collector according to the first embodiment of the present invention.
8 is a cross-sectional view taken along the line IV-IV in FIG. 6 of the low noise current collector according to the first embodiment of the present invention.
FIG. 9 is a cross-sectional view showing an internal structure in a state where a drive mechanism of a low-noise current collecting apparatus according to a second embodiment of the present invention is extended.
FIG. 10 is a cross-sectional view showing an internal structure in a state where a drive mechanism of a low-noise current collecting apparatus according to a third embodiment of the present invention is extended.
11 is an enlarged view of a portion V in FIG. 2 of the low noise current collector of the present invention.
12 is a sectional view taken along the line VII-VII in FIG. 11 of the low-noise current collector according to the present invention.
13 is a cross-sectional view taken along the line VIII-VIII of FIG. 11 of the low noise current collector of the present invention.
14 is an enlarged view of a VI portion of FIG. 2 of the low noise current collector of the present invention.
FIG. 15 is a diagram in the case where contact force detecting means 2b between the overhead wire 1 and the sliding plate 2 is provided between the sliding plate 2 and the spring 2a of the low noise current collector of the present invention.
FIG. 16 is a view when a contact force detecting means 2b between the overhead wire 1 and the sliding plate 2 is provided between the spring 2a of the low noise current collector of the present invention and the boat body 3.
FIG. 17 is a conceptual diagram of an active control system for a low-noise current collector according to the present invention.
FIG. 18 is a configuration diagram of a hooking device of a low-noise current collector according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Overhead wire, 2 ... Sliding board, 3 ... Ship body, 4 ... Insulator, 5 ... Upper frame, 6 ... Intermediate frame, 7 ... Dual link actuator, 8 ... Linear guide shaft, 8a ... Spring, 9 ... Lower frame DESCRIPTION OF SYMBOLS 10 ... Link, 10a ... Link, 11 ... Linear guide shaft, 12 ... Lever, 13 ... Cam, 14 ... Air servo cylinder, 15 ... Spring, 16 ... Wire, 17 ... Damper, 71 ... Electric motor, 71a ... Reduction gear, 72 ... Crank arm, 73 ... Crank rod, 201 ... High-voltage flexible insulating coated conductor, 301 ... Cover, 301a ... Cover sliding part, 302 ... Cover, 302a ... Insulator sliding part, 303 ... Cover, 304 ... Packing, 305 ... Packing, 401 ... Linear motor, 402 ... Air servo cylinder, 451 ... Control device, 452 ... Emergency control device, 500 ... Hooking device, 5 01: hook pin, 502 ... hook rod, 504 ... external cylinder, 505 ... hook spring.

Claims (5)

A hull with a sliding plate that contacts the overhead line and collects current, an insulating support that supports the hull on the top of the vehicle, and a drive that drives the hull and the insulating support and maintains contact with the overhead line A railway vehicle current collector comprising a mechanism,
The drive mechanism is composed of one of a spring and a damper, an air servo cylinder, a rotary shaft driven by the air servo cylinder, and a link mechanism, and drives the boat body in the upward direction by the spring, and the air servo cylinder A first drive mechanism comprising the link mechanism connected to drive the hull in the descending direction and configured to convert the rotary motion into the ascending / descending motion of the hull, an electric motor and the rotary motion thereof A second drive mechanism composed of a link mechanism configured to convert the crank body into an ascending / descending motion by two crank arms and a crank rod disposed opposite to each other,
A cover divided into a plurality of parts covering the whole of the first drive mechanism and the second drive mechanism is provided, and the divided covers slide in a telescopic manner, and the cover is close to the boat body. It has a combination with a large diameter on the side and a small diameter near the roof,
Two groups of zigzag-shaped raised brushes with spherical tips are provided at the lower end of the large-diameter sliding surface of the cover that is divided into a plurality of pieces and slides on each other. A railcar current collector comprising a sliding packing having a structure provided with   2. The linear guide shaft having a spring arranged coaxially, wherein the second drive mechanism uses a linear motor or an air servo cylinder as a drive source, restrains forward / backward / left / right movement, and allows only upward and downward movement. A current collector for a railway vehicle comprising: A hull with a sliding plate that contacts the overhead line and collects current, an insulating support that supports the hull on the top of the vehicle, and a drive that drives the hull and the insulating support and maintains contact with the overhead line A railway vehicle current collector comprising a mechanism,
The drive mechanism is composed of one of a spring and a damper, an air servo cylinder, a rotary shaft driven by the air servo cylinder, and a link mechanism, and drives the boat body in the upward direction by the spring, and the air servo cylinder A first drive mechanism comprising the link mechanism connected to drive the hull in the descending direction and configured to convert the rotary motion into the ascending / descending motion of the hull, an electric motor and the rotary motion thereof A second drive mechanism composed of a link mechanism configured to convert the crank body into an ascending / descending motion by two crank arms and a crank rod disposed opposite to each other,
The second drive mechanism is composed of a linear guide shaft having a coaxially arranged spring, which uses a linear motor or an air servo cylinder as a drive source, restrains the movement in the front / rear and left / right directions, and allows only the upward / downward movement,
The air servo cylinder of the first drive mechanism on the basis of a signal detected by a contact force detection means between the sliding plate and the hull or between the hull and the insulating support; A control device is provided that controls the driving force and stroke of the linear motor or air servo cylinder of the second driving mechanism and outputs a signal for making the contact force with the overhead wire substantially constant,
The air servo cylinder of the first drive mechanism is configured to supply an emergency control device provided separately and to lower the hull to a lower limit position when the control device fails. A railway vehicle current collector. A hull with a sliding plate that contacts the overhead line and collects current, an insulating support that supports the hull on the top of the vehicle, and a drive that drives the hull and the insulating support and maintains contact with the overhead line A railway vehicle current collector comprising a mechanism,
The drive mechanism is composed of one of a spring and a damper, an air servo cylinder, a rotary shaft driven by the air servo cylinder, and a link mechanism, and drives the boat body in the upward direction by the spring, and the air servo cylinder A first drive mechanism comprising the link mechanism connected to drive the hull in the descending direction and configured to convert the rotary motion into the ascending / descending motion of the hull, an electric motor and the rotary motion thereof A second drive mechanism composed of a link mechanism configured to convert the crank body into an ascending / descending motion by two crank arms and a crank rod disposed opposite to each other,
The second drive mechanism is composed of a linear guide shaft having a coaxially arranged spring, which uses a linear motor or an air servo cylinder as a drive source, restrains the movement in the front / rear and left / right directions, and allows only the upward / downward movement,
The air servo cylinder of the first drive mechanism on the basis of a signal detected by a contact force detection means between the sliding plate and the hull or between the hull and the insulating support; A control device is provided that controls the driving force and stroke of the linear motor or air servo cylinder of the second driving mechanism and outputs a signal for making the contact force with the overhead wire substantially constant,
The linear motor or pneumatic servo cylinder of the second drive mechanism can feed or supply an emergency control device provided separately in the event of a failure of the control device, and lower the hull to the lower limit position. A railway vehicle current collector characterized by the above.   5. The boat according to claim 1, wherein after the boat body is lowered to the lower limit position, the electricity and air supply means to the first drive mechanism and the second drive mechanism are cut off. A railway vehicle current collector comprising a hooking device for holding a body at a lower limit position.

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