JP6208454B2 - Railway vehicle current collector - Google Patents

Description

  The present invention relates to a railway vehicle current collector including a pantograph unit and an insulator, and more particularly to a railway vehicle current collector that can significantly reduce aerodynamic noise caused by the insulator and air resistance caused by the insulator.

  In recent years, high-speed railway vehicles such as Shinkansen (registered trademark) have been increasing in speed, and various measures for reducing noise during traveling have been taken to protect the railway environment. Here, a railcar current collector (hereinafter simply referred to as a “current collector”) is provided on the roof surface of the railcar. The high voltage power is collected from the overhead line by a pantograph and the high voltage power by an insulator. Is insulated so that no current flows through the car body. However, this current collector has been a major cause of aerodynamic noise generated by running wind when traveling at high speeds.

  In particular, in an insulator, in general, in order to increase the creepage distance (the shortest distance along the surface of the insulator between two conductive members), an annular flange is formed in a plurality of stages extending horizontally. Yes. For this reason, the traveling wind directly hits the buttocks of the insulator and a large aerodynamic noise was generated. Therefore, conventionally, for example, a current collector described in Patent Document 1 below or a current collector described in Patent Document 2 below has been proposed in order to reduce aerodynamic noise caused by the insulator.

  In the current collector of Patent Document 1 below, as shown in FIG. 6, a windshield cover 140 surrounding the insulator 120 is installed, and the windshield cover 140 is provided from the front side and the rear side in the traveling direction (rail direction). Inclined surfaces 140a and 140b that gently rise toward the pantograph 111 are formed. In addition, on the roof top surface S, a substantially triangular sound insulation cover 150 is installed upright at both ends in the sleeper direction. For this reason, in the current collector 101, the traveling wind flows along the inclined surfaces 140 a and 140 b and does not directly hit the insulator 120, reduces aerodynamic noise caused by the insulator 120, and reduces aerodynamic noise to the outside by the sound insulation cover 150. I tried to make it difficult to spread.

  Further, in the current collector of Patent Document 2 below, as shown in FIG. 7, the base frame 211 a of the pantograph 211 is supported by two insulators 220, and each insulator 220 has a flat shape whose horizontal cross section extends long in the traveling direction. It has a shape. For this reason, in this current collector 201, the area where the traveling wind directly hits the flange 220e of the insulator 220 is smaller than in the conventional case, reducing aerodynamic noise due to the insulator 220 and reducing the air resistance due to the insulator 220. To improve the speed.

Japanese Patent No. 3630419 JP 2000-23302 A

  However, the current collector of Patent Document 1 and the current collector of Patent Document 2 have the following problems. First, in the current collector of Patent Document 1, as shown in FIG. 6, the windshield cover 140 and the sound insulation cover 150, which are large members, are installed on the roof upper surface S, so that the vehicle weight has increased. Further, since the windshield cover 140 and the sound insulation cover 150 are relatively expensive, the vehicle cost has also increased. Furthermore, since the cavities are formed by the concave and convex portions of the windshield cover 140 and the sound insulation cover 150, the flow of the traveling wind is disturbed, which affects the push-up force and aerodynamic noise of the pantograph 111. In addition, there is a problem that the design of the current collector 101 is not preferable.

  On the other hand, the current collector 201 of Patent Document 2 does not include large covers such as the windshield cover 140 and the sound insulation cover 150 described above, as shown in FIG. However, the area where the traveling wind directly hits the flange 220e of the insulator 220 still remains, and the effect of reducing the aerodynamic noise by the insulator 220 and reducing the air resistance by the insulator 220 still has room for improvement. . Further, since the flange 220e of the insulator 220 is exposed and visible, there is a problem that the design of the current collector 201 is not preferable.

  Therefore, the present invention has been made to solve the above-described problems, and it is possible to significantly reduce aerodynamic noise due to the insulator without installing a large cover such as a windshield cover and a sound insulation cover, and air resistance due to the insulator. It is an object of the present invention to provide a railway vehicle current collector that can greatly reduce the power consumption of the railway vehicle.

  A railway vehicle current collector according to the present invention includes a pantograph unit that collects high-voltage power from an overhead line by a pantograph, and an insulator that mounts the pantograph unit and insulates high-voltage power. The pantograph unit has an upper outer surface part that covers the lower side of the pantograph, rises in a curved shape from the peripheral part toward the center, and extends in the running direction and is streamlined. The insulator is integrated with the pantograph unit. In the assembled state, it is attached to the upper surface of the roof via a column arranged in the center, and continuously descends from the upper outer surface of the pantograph unit toward the vicinity of the center and travels. A lower outer surface portion that is long in the direction and is streamlined, and a plurality of annular flange portions that extend downward from a recess formed around the support column. Characterized in that it.

  According to the railway vehicle current collector according to the present invention, since the flange portion of the insulator is formed so as to extend downward at the concave portion, it is difficult to directly hit the flange portion of the insulator where the traveling wind is hidden by the concave portion. For this reason, the aerodynamic noise by a lever can be reduced significantly. Furthermore, since the lower outer surface portion of the insulator extends in the running direction and is streamlined, the air resistance due to the insulator can be greatly reduced. In addition, the insulator has a pantograph unit integrally assembled, and the upper outer surface portion and the lower outer surface portion of the insulator are elongated in the running direction, are streamlined, and have a smooth shape with no irregularities. Because the design is excellent. And it becomes unnecessary to install big covers, such as a windshield cover and a sound insulation cover, the upper part from the roof upper surface becomes simple, and the freedom degree of design becomes large.

In the railcar current collector according to the present invention, it is preferable that the flange portion is provided above a lowermost end of the lower outer surface portion.
In this case, when viewed from the traveling direction, the collar portion is completely hidden in the recess of the insulator. For this reason, traveling wind hardly hits the buttocks of the insulator, and aerodynamic noise can be further reduced.

Moreover, in the railway vehicle current collector according to the present invention, the peripheral portion of the pantograph unit may be joined to the peripheral portion of the insulator using a sealed structure.
In this case, the sealed structure prevents wind noise generated in the gap between the peripheral portion of the pantograph unit and the peripheral portion of the insulator, and water and dust are introduced from the peripheral portion of the pantograph unit and the peripheral portion of the insulator to the inside. Can be suppressed and the failure rate of pantographs and the like can be reduced.

Further, in the railway vehicle current collector according to the present invention, below the lowermost end of the lower outer surface portion of the support column, the horizontal section has a flat shape that is long in the traveling direction, and becomes thicker toward the lower side. Also good.
In this case, since the horizontal cross section of the support column has a flat shape that is long in the traveling direction, the air resistance can be reduced compared to the case where the horizontal cross section of the support column is rectangular or circular. Moreover, since the support | pillar becomes thick as it goes below, an insulator and a pantograph unit can be firmly supported by a support | pillar.

Moreover, in the railway vehicle current collector according to the present invention, it is preferable that the upper outer surface portion is made of an insulating material.
In this case, the creepage distance can be further increased by the upper outer surface portion of the pantograph unit in addition to the insulator.

  According to the railway vehicle current collector of the present invention, aerodynamic noise due to the insulator can be greatly reduced without installing a large cover such as a windshield cover and a sound insulation cover, and the air resistance due to the insulator can be greatly reduced. In addition, the design is excellent.

It is a perspective view when the current collector of the present embodiment is viewed obliquely from above. It is a perspective view when the current collector of the present embodiment is viewed obliquely from below. It is the side view which showed the pantograph unit shown in FIG. FIG. 2 is an exploded side view of the current collector shown in FIG. 1. It is a figure when the current collector of this embodiment is seen from a running direction. It is a perspective view when a current collector is seen from diagonally upward as an example of a conventional current collector. It is a perspective view when a current collector is seen from diagonally upward as another example of the conventional current collector.

  DESCRIPTION OF EMBODIMENTS Embodiments of a railway vehicle current collector according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view when the current collector 1 of the present embodiment is viewed from obliquely above, and FIG. 2 is a perspective view when the current collector 1 of the present embodiment is viewed obliquely from below.

  As shown in FIGS. 1 and 2, the current collector 1 includes a pantograph unit 10 on the upper side and a lever 20 and a support column 30 on the lower side. Since the insulator 20 and the support column 30 are integrally formed units, the current collector 1 of the present embodiment is mainly composed of two units. Here, FIG. 3 is a side view showing the pantograph unit 10 shown in FIG. In FIG. 3, the parts other than the pantograph 11 are indicated by virtual lines.

  The pantograph unit 10 collects high-voltage power from an overhead line (not shown) by the pantograph 11, and includes a pantograph 11 and a pantograph cover 12, as shown in FIG. The collected high-voltage power is sent to the traveling motor via a circuit breaker, a transformer, an inverter device and the like mounted on the vehicle body.

  As shown in FIG. 3, the pantograph 11 is a square-shaped single-arm pantograph, and includes a current collecting boat 11 a that contacts the overhead line, a horn 11 b that extends outward from the current collecting boat 11 a in the sleeper direction, The upper frame 11c attached to the electric boat 11a, the lower frame 11d which supports this upper frame 11c so that rocking | fluctuation are possible, and the base frame 11e are provided. Further, the pantograph 11 is provided with an actuator 11f, a coil spring 11g, and the like for raising and lowering the lower frame 11d and the upper frame 11c in order to bring the current collecting boat 11a into contact or non-contact with the overhead wire.

  As shown in FIG. 3, the pantograph cover 12 is a hollow cover that covers the lower side of the pantograph 11 (the lower frame 11d, the base frame 11e, the actuator 11f, and the coil spring 11g). The pantograph cover 12 has an outer surface portion 12b that rises in a curved shape from the peripheral edge portion 12a toward the center. The outer surface portion 12b extends long in the traveling direction (left and right direction in FIG. 3) so as to reduce air resistance, is streamlined, and has a smooth shape without irregularities, and the horizontal cross section of the outer surface portion 12b is elliptical. Is. Thus, the traveling wind flows along the outer surface portion 12b of the pantograph cover 12 and hardly hits the lower side of the pantograph 11 so that aerodynamic noise caused by the pantograph 11 can be reduced. The outer surface portion 12b of the pantograph cover 12 corresponds to the “upper outer surface portion” of the present invention.

  As shown in FIG. 1, a through hole 12 c for allowing the upper frame 11 c of the pantograph 11 to penetrate is formed at the upper center of the outer surface portion 12 b. The through-hole 12c is configured to be as small as possible so long as it does not come into contact with the upper frame 11c when the upper frame 11c moves up and down. In the present embodiment, the pantograph cover 12 is a separate member that covers the lower side of the pantograph 11, but as a modification, for example, the underframe 11e (see FIG. 3) has a shape that also has a pantograph cover. The pantograph and the pantograph cover may be an integral member. Here, FIG. 4 is an exploded side view of the current collector 1 shown in FIG. In addition, in FIG. 4, the longitudinal cross-sectional view is shown in the insulator 20 and the support | pillar 30. As shown in FIG.

  As shown in FIGS. 1 to 4, the insulator 20 is for mounting the pantograph unit 10 to insulate high-voltage power. The insulator 20 is roughly shaped like the lower half of the rugby ball. The peripheral portion 20a of the insulator 20 and the peripheral portion 12a of the pantograph cover 12 (pantograph unit 10) are attached with bolts or the like, and can be removed when the pantograph unit 10 is maintained. Moreover, the insulator 20 is attached to the roof upper surface S (refer FIG. 5) of a railway vehicle via the support | pillar 30 arrange | positioned in the center. In the present embodiment, the insulator 20 is made of ceramic as an insulating material, but the insulating material can be changed as appropriate.

  As shown in FIG. 4, an annular groove 20 b for assembling the annular waterproof packing 21 is formed on the upper surface of the peripheral edge portion 20 a of the insulator 20 on the entire circumference except for a drain hole portion described later. Thereby, the upper surface of the peripheral part 20a of the insulator 20 and the lower surface of the peripheral part 12a of the pantograph cover 12 are joined in a state where the waterproof packing 21 is elastically deformed and sandwiched. Thus, the airtight structure using the waterproof packing 21 can prevent wind noise generated in the gap between the peripheral edge portion 12a of the pantograph cover 12 and the peripheral edge portion 20a of the insulator 20, and water and dust can be prevented from being generated in the peripheral edge of the pantograph cover 12. Intrusion into the inside from the peripheral portion 20a of the portion 12a and the insulator 20 can be prevented. However, since there is a possibility that water may enter the inside from above through the through-hole 12c of the pantograph cover 12, water for injecting the water that has entered the inside to the outside is partially inserted into the peripheral portion 20a of the insulator 20. A punch hole (not shown) is provided. And, as will be described later, the electrical connection portion 40 constituted by the central portion of the insulator 20 has a structure capable of completely preventing flooding, and its periphery is completely sealed using a packing as much as possible. . In addition, the sealing structure mentioned above is not limited to the structure using the waterproof packing 21, It can change suitably.

  Next, the shape of the insulator 20 of this embodiment is demonstrated in detail. As shown in FIGS. 1 and 2, the insulator 20 has an outer surface portion 20 c that continuously descends from the outer surface portion 12 b of the pantograph cover 12 toward the vicinity of the center. The outer surface portion 20c extends long in the traveling direction (left and right direction in FIG. 4), is streamlined, and has a smooth shape without irregularities, and the horizontal cross section of the outer surface portion 20c is elliptical. Thus, the traveling wind flows along the outer surface portion 20c of the insulator 20 so that the air resistance can be reduced. The outer surface portion 20c of the insulator 20 corresponds to the “lower outer surface portion” of the present invention.

  Further, as shown in FIGS. 2 and 4, the insulator 20 has a recess 20d formed around the support column 30, and a three-stage annular flange 20e extending downward from the recess 20d. In the present embodiment, the insulator 20 is arranged so that the recess 20d is recessed in the vertical direction and each flange 20e extends in the vertical direction, as in the conventional general insulator (see FIGS. 6 and 7). The recesses are recessed in the horizontal direction and the flanges do not extend in the horizontal direction. Thus, the arrangement of the recesses 20d and the flanges 20e of the present embodiment makes it difficult for the traveling wind to directly hit the recesses 20d and the insulators 20e. Each flange 20e is for increasing the creepage distance (the shortest distance along the surface of the insulator 20 between the pantograph 11 and the support 30 as two conductive members), and is concentric and elliptical. It has become. The length of each flange 20e is set to a dimension that can ensure the creepage distance specified for the highest voltage to be used in consideration of the number of steps of the flange 20e. Here, each brim 20e is necessary for increasing the creepage distance. That is, if the creepage distance is not sufficiently secured by the flanges 20e, water, dust, and the like adhering to the outer surface portion 20c cause discharge, and a sufficient electrical insulation effect cannot be obtained.

  As in this embodiment, the creepage distance required in the insulator of a railway vehicle is defined by the highest voltage used. For example, in the case of the Shinkansen (registered trademark), there is a creepage distance that can correspond to 30,000 V or more. It is prescribed. And in the insulator 20 of this embodiment, since a horizontal cross section is an ellipse long in a running direction, it is necessary to ensure a creepage distance of 30,000 V or more in a sleeper direction orthogonal to the running direction (rail direction). is there. Accordingly, the length of the insulator 20 in the sleeper direction, the number of steps of the flange 20e, and the length of the flange 20e are appropriately set so as to ensure a creepage distance of 30,000 V or more. On the other hand, since the weight of the vehicle increases when the lever 20 itself increases, the lever 20 is configured to be as small as possible within a range in which the creepage distance can be secured. In the present embodiment, the size of the insulator 20 in the traveling direction increases according to the shape of the ellipse.

  As shown in FIG. 4, the column 30 is for supporting the insulator 20 and the pantograph unit 10, and has an attachment portion 30a on the upper side and a support portion 30b on the lower side. The attachment portion 30a is attached to the center of the insulator 20 by a high pressure bushing (not shown). The mounting portion 30a has an elliptical shape (flat shape) whose horizontal cross section is long in the traveling direction, and is formed to be relatively thin in order to secure a large portion of the insulator 20 where the flange portion 20e is formed. ing.

  On the other hand, the support portion 30b becomes thicker toward the lower side so as to firmly support the heavy insulator 20 and the pantograph unit 10, and is fixed to the roof upper surface S (see FIG. 5) at the lower surface. Further, the support portion 30b has an elliptical shape (flat shape) whose horizontal section is long in the traveling direction, and the surface of the support portion 30b has a smooth shape with no irregularities. Thereby, compared with the case where the horizontal cross section of the support part 30b is a rectangle or circular, for example, it becomes easy for a running wind to flow smoothly with respect to the surface of the support part 30b, and can reduce air resistance.

  In the present embodiment, the support column 30 is made of metal so that the support strength is sufficiently satisfied, and the lever 20 and the pantograph unit 10 are used even under traveling conditions of 350 km / h or more and a wind speed of 100 m / s or more. Can be firmly supported. In addition, the support | pillar 30 may be comprised by FRP (fiber reinforced plastic) etc., if support strength is fully securable.

  As shown in FIG. 4, a through hole 30 c extending in the vertical direction is formed at the center of the support column 30, and the bottom portion of the cup-shaped annular member 41 assembled on the support column 30 is also provided. A through hole 41a extending in the vertical direction is formed. The power cable 31 is inserted through the through hole 30c and the through hole 41a, and the upper end of the power cable 31 is connected to the lower end of the power cable 13 extending from the pantograph 11. And the cylindrical member 42 arrange | positioned around the lower end of the power cable 13 is assembled | attached around the annular member 41 arrange | positioned around the upper end of the power cable 31 using packing (illustration omitted). In this way, in the electrical connection portion 40 configured by the central portion of the insulator 20, the watertight structure can completely prevent the inundation. The insulator 20 is made of an insulating material as described above, and the annular member 41 is made of an insulating material as will be described later. However, the insulator 20 and the annular member 41 are integrally formed. It may be configured, or may be bonded as a separate member. When the insulator 20 and the annular member 41 are bonded, sufficient electrical insulation is secured at the bonded portion.

  The annular member 41 and the cylindrical member 42 are made of an insulating material so as to prevent leakage. And in the through-hole 41a of the annular member 41, it is assembled | attached so that the insulation seal member 43 may be sealed in the state which the electric power cable 31 penetrated. Thus, the upper end portion of the power cable 31 has a sealed structure that is completely covered with the insulating member. Furthermore, the bottom part of the annular member 41 made of an insulating material is covered so that the upper end of the support column 30 is not exposed, and even if electric power of 30,000 V or more flows through the power cable 31, no leakage occurs. It has such a sufficient thickness. In this way, the insulation between the support column 30 and the annular member 41 is reliably maintained. Further, the lower side of the power cable 31 branches forward and rearward in the traveling direction and extends to the outside from the support portion 30b. And the high voltage cable 32 is connected to the both ends of the power cable 31 extended to the outer side from the support part 30b. Thus, the high voltage power collected from the overhead line by the pantograph 11 is supplied to the vehicle body side via the power cable 13, the power cable 31, and the high voltage cable 32.

  As shown in FIG. 4, the through-hole 30 c is filled with an insulating compound 33 to improve electrical insulation between the upper side of the power cable 31 and the support column 30. In addition, it may replace with the insulation compound 33 and the pipe | tube comprised by FRP may be inserted in the through-hole 30c, and electrical insulation may be improved. The support 30 is provided with an air pipe (not shown) for supplying compressed air to the actuator 11f of the pantograph 11 in consideration of insulation.

  By the way, in the current collector 1 of the present embodiment, as described above, the outer surface portion 20c, the recessed portion 20d, and the flange portion 20e of the insulator 20 are greatly characterized. That is, conventionally, as a lever used in a current collector for a railway vehicle, one that extends in the horizontal direction and has a plurality of ring-shaped flanges has been generally used. Such an insulator is used to increase the creepage distance. However, there is a problem in that the traveling wind directly hits the flange portion of the insulator, resulting in a large air noise due to the insulator and a large air resistance due to the insulator.

  Therefore, in the current collector 1 of the present embodiment, the shape of the insulator is drastically changed, and first, the insulator 20 can be integrally assembled with the pantograph unit 10, and the outer surface portion 20 c of the insulator 20 is pantographed. It forms so that it may become smooth continuously with respect to the outer surface part 12b of the cover 12. FIG. The outer surface portion 20c of the insulator 20 and the outer surface portion 12b of the pantograph cover 12 are vertically symmetrical and extend long in the traveling direction, and are streamlined. Thereby, the air resistance by the insulator 20 is significantly reduced.

  However, in general, it is considered that there is a contradictory relationship between reducing the air resistance by making the outer surface portion of the insulator smooth and reducing the creepage distance by the flange portion of the insulator. This is because as the outer surface portion of the insulator becomes smoother, there is no portion that forms the flange portion of the insulator. Therefore, in this embodiment, the air resistance is reduced by changing the orientation of the insulator 20 from the conventional one so that the flange portion 20e does not extend in the horizontal direction as in the conventional case, but the flange portion 20e extends downward. It is designed to achieve a balance between increasing the creepage distance.

  Thus, in the present embodiment, the concave portion 20d and the flange portion 20e are hidden by the outer surface portion 20c of the insulator 20 that is lowered in a curved shape when viewed from the traveling direction. In particular, since the flange 20e (the tip of the flange 20e) is provided above the lowermost end 20g (see FIG. 4) of the outer surface 20c of the insulator 20, the flange 20e is completely covered by the outer surface 20c of the insulator 20. It will be hidden in. For this reason, the traveling wind hardly hits the flange 20e, and the air resistance by the insulator 20 and the aerodynamic noise by the insulator 20 can be further reduced. Here, FIG. 5 is a diagram when the current collector 1 shown in FIG. 1 is viewed from the traveling direction.

  As shown in FIG. 5, in the current collector 1 of the present embodiment, the air resistance by the insulator 20 and the pantograph 11 and the aerodynamic force by the insulator 20 and the pantograph 11 by the outer surface portion 20 c of the insulator 20 and the outer surface portion 12 b of the pantograph cover 12. Since noise can be reduced, unlike the conventional current collector 101 shown in FIG. 6, the windshield cover 140 and the sound insulation cover 150 are unnecessary. The windshield cover 140 and the sound insulation cover 150 are large and relatively expensive. Therefore, in this embodiment, vehicle weight and vehicle cost can be reduced by not installing large covers such as the windshield cover 140 and the sound insulation cover 150. In addition, the upper part from the roof top surface S is simplified, the degree of freedom in vehicle design can be increased, and vibration caused by the windshield cover 140 and the sound insulation cover 150 can be eliminated.

  Furthermore, in the current collector 1 of the present embodiment, as shown in FIG. 5, the pantograph cover 12 is mainly configured by two units of an upper pantograph unit 10, a lower insulator 20 and a support 30. The outer surface portion 12b and the outer surface portion 20c of the insulator 20 are smooth and streamlined without irregularities. And the surface of the support part 30b of the support | pillar 30 is also smooth without an unevenness | corrugation. Therefore, the current collector 1 has almost no irregularities and is excellent in design, and since it hardly constitutes a cavity, the traveling wind is hardly disturbed, the pushing force of the pantograph unit 10 can be reduced, and aerodynamic noise can also be reduced. .

  Moreover, in the current collector 1 of the present embodiment, as described above, it is mainly configured simply by two units, and the number of the insulators 20 is one. And the support | pillar 30 which supports the insulator 20 is one, and it does not support with a some thin support | pillar. Therefore, compared to a conventional current collector, the unit is simple and simple, and the number of insulators and supports is small, so that the current collector is easy to manufacture.

  Moreover, in the current collector 1 of the present embodiment, the pantograph cover 12 is made of FRP which is an insulating material. Thereby, in addition to the insulator 20, the creeping distance can also be increased by the outer surface portion 12b of the pantograph cover 12. When the pantograph cover 12 is not an insulating material, the outer surface portion 12b may be made of an insulating material by spraying ceramic on the outer surface portion 12b of the pantograph cover 12.

The effect of this embodiment is demonstrated.
According to the current collector 1 of the present embodiment, as shown in FIG. 4, the flange 20e of the insulator 20 is formed to extend downward in the recess 20d, and thus the insulator 20 whose traveling wind is hidden by the recess 20d. It is difficult to directly hit the buttocks 20e. For this reason, the aerodynamic noise by the insulator 20 can be reduced significantly. Furthermore, since the outer surface portion 20c of the insulator 20 extends long in the traveling direction and is streamlined, the air resistance by the insulator 20 can be greatly reduced. In addition, the insulator 20 is integrally assembled with the pantograph unit 10, and the outer surface portion 12 b of the pantograph cover 12 and the outer surface portion 20 c of the insulator 20 extend long in the traveling direction, are streamlined, and have a smooth shape without irregularities. Therefore, the design is excellent.

As mentioned above, although embodiment of the collector apparatus for rail vehicles which concerns on this invention was described, this invention is not limited to this embodiment, A various change is possible in the range which does not deviate from the meaning.
For example, in the present embodiment, the horizontal cross section of the outer surface portion 12b of the pantograph cover 12, the horizontal cross section of the outer surface portion 20c of the insulator 20, and the horizontal cross sections of the mounting portion 30a and the support portion 30b of the support column 30 are elliptical long in the traveling direction. However, it can be appropriately changed as long as it is flat, and may be, for example, an oval shape long in the traveling direction.
Further, in the present embodiment, the flange portion 20e of the insulator 20 has an elliptical shape with three steps, but the number of steps of the flange portion 20e can be appropriately changed as long as it is a plurality of steps, and the shape of the flange portion 20e is: Any ring shape can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Current collector 10 Pantograph unit 11 Pantograph 12 Pantograph cover 12a Peripheral part 12b Outer surface part 13 Electric power cable 20 Insulator 20a Peripheral part 20b Annular groove 20c Outer surface part 20d Recessed part 20e Gutter part 20g Bottom end 21 Waterproof packing 30 Strut 30a Mounting part 30b Support Portion 31 Power cable 32 High voltage cable 33 Insulation compound 40 Connection portion 41 Ring member 42 Cylindrical member 43 Insulation seal member

Claims (5)

A pantograph unit that collects high-voltage power from the overhead line using a pantograph;
In a railway vehicle current collector comprising an insulator that mounts the pantograph unit and insulates high-voltage power,
The pantograph includes an upper frame and a lower frame that supports the upper frame so as to be movable up and down.
It said pantograph unit, and a pantograph cover have the upper outer surface part is streamlined from the periphery to cover all parts rising into a curved shape toward the center, and elongated in the running direction of the lower frame,
The insulator is attached to the roof top surface via a support column disposed in the center in a state where the pantograph unit is integrally assembled, and continuously from the upper outer surface of the pantograph unit toward the vicinity of the center. A lower outer surface portion that is a curved line and that extends long in the running direction and has a streamline shape, and a plurality of annular flange portions extending downward from a recess formed around the support column, A railway vehicle current collector. The railway vehicle current collector according to claim 1,
The railcar current collector, wherein the flange is provided above a lowermost end of the lower outer surface portion. In the current collector for a railway vehicle according to claim 1 or 2,
A railcar current collector, wherein a peripheral portion of the pantograph unit is joined to a peripheral portion of an insulator using a sealing structure. In the railcar current collector according to any one of claims 1 to 3,
A railcar current collector characterized in that, below the lowermost end of the lower outer surface portion of the support column, the horizontal section has a flat shape that is long in the traveling direction and becomes thicker toward the lower side. In the railcar current collector according to any one of claims 1 to 4,
The current collector for a railway vehicle, wherein the upper outer surface portion is made of an insulating material.

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