JPH05146004A - Current collector - Google Patents

Abstract

PURPOSE:To provide a current collector in which air resistance and noise are suppressed remarkably at the time of high speed traveling of motor vehicle. CONSTITUTION:The current collector comprises a slider 2 contacting with a stringing 1, a streamline shoe 6 supporting the slider 2, a vertically movable streamline support 7 for the shoe 6, a streamline seat 11 for supporting the support 7, and insulating supporting legs 13a, 13b having streamline profile in the longitudinal direction for supporting the seat 11 on the roof of a vehicle while keeping an electrical insulating distance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector, and more particularly to a current collector suitable for reducing air resistance and noise of an electric vehicle traveling at high speed.

[0002]

2. Description of the Related Art As the prior art, Japanese Patent Publication No. 2-5068
As described in No. 1, the current collecting tube is expanded and contracted by a rack and pinion provided on its outer surface and a motor, and the lower one vertical extension tube for guiding the current collecting tube is not electrically insulated. Up to the attic. Also, the actual fair 3-
A pantograph current collector is supported by four vertical insulators as described in US Pat.

[0003]

DISCLOSURE OF THE INVENTION In the prior art,
In the former case, since the insulating support means is not provided without considering the electrical insulation, the current collecting tube and the extension tube are one in series, but this seems to be sufficient in strength. However, since the rack and pinion is provided on the outer surface of the current collecting tube, air resistance and noise may increase as the speed increases. In the latter case, the insulating support legs are provided under the pedestal, but since there are four and many upright columns and they are upright columns, air resistance and noise may increase as the speed increases. Furthermore, since it is a pantograph type expansion / contraction mechanism, the dimensions of each member are small, the Karman vortex frequency is high, and there is concern that air resistance and noise will increase further as speed increases.

The main object of the present invention is to make the constituent members streamlined while ensuring an insulation distance and to reduce the number of constituent members to achieve air resistance and noise reduction.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a current collecting rail contacting an overhead wire, a streamline boat supporting the current collecting rail, and a vertically movable support for the boat. A streamlined support column, a pedestal having a streamlined outer shape for supporting the support column, and an insulating support leg having a streamlined horizontal cross section in the front-rear direction for supporting the pedestal on the roof of the vehicle while maintaining electrical insulation. It is characterized by being composed of and.

[0006]

According to the present invention, the current collector includes a boat body which is relatively streamlined and wraps around the current collecting rail plate in a relatively large size.
A support pillar that supports the boat and has a relatively large size and a streamlined shape, a streamlined pedestal that supports the support pillar, and an insulation that supports the pedestal and has a streamlined and sufficient electrical insulation distance. It is composed of supporting legs, has a streamlined and relatively large size, and the number of members is minimized while keeping a sufficient distance of electrical insulation, so that the turbulence of the air flow is small and the Karman vortex generation frequency is low, Moreover, the number of sound sources is reduced, and air resistance and noise are significantly reduced.

[0007]

Embodiments of the present invention will be described below with reference to FIGS. In the figure, 1 is an overhead wire, 2 is a current collecting strip, and 3 and 4 are support springs that support the current collecting strip 2. Reference numeral 5 is a support seat that connects the support springs 3 and 4 in series.
The reference numeral 6 designates a current collecting strip 2 which supports the current collecting strip 2 and the support seat 5.
It is a ship with a streamlined shape that wraps around the circumference of the ship. Reference numeral 7 is a support column that supports the boat body 6 and has a relatively large size and is streamlined, and is composed of a multistage cylinder so as to be movable in the vertical direction. Reference numeral 8 is a pantograph-type link which is connected to the head of each cylinder by a pin and can be expanded and contracted in the vertical direction, and 9 is a pressing spring which presses the current collecting strip 2 against the overhead wire 1 via the pantograph-type link 8. Reference numeral 10 is a pedestal having an internal structure capable of accommodating the support pillars 7 when current is not collected and having an outer shape that is streamlined in the front-back direction.

12 is the roof of the vehicle. 13a, 13b
In order to support the pedestal 11 on the roof 12 of the vehicle with a sufficient electrical insulation distance, the insulating support legs are tilted in the front-rear direction. The insulating support legs 13a and 13b
Support two pedestals 11, each horizontal cross section is streamlined in the front-rear direction, and has a fold on the surface. The insulating support leg 13a is an insulator made of an insulator or the like for electrical insulation, and the insulating support leg 13b is an insulator and is also a cable head for guiding the high voltage collected from the overhead wire 1 to the transformer of the vehicle. is there. Reference numeral 14 is a conducting wire connected from the current collecting contact plate 2 to the insulating support leg 13b. In the insulating support leg 13b, 15a is an insulator, 15b is an insulator made of epoxy resin, 15c is an insulating filler, and 15d.
Is a conductor connected to the conductor wire 14, 15e is a cable connected to the conductor 15d and connected to the transformer, and 15f is a protective case, which form a cable head.

According to the above construction, the support column 7 supported by the pedestal 11 is connected to the pantograph type link 8 by the pressing spring 9.
The current collecting strip 2 supported by the support pillars 7 is pushed against the overhead line 1 to collect current. However, since the boat body 6, the support pillars 7, and the pedestal 11 each have a relatively large size and are streamlined, and the pedestal 11 is supported by two slanting diagonal insulating support legs, Body 6, support pillar 7,
The strength is secured against the moment due to the aerodynamic force applied to the pedestal 11 in the front-rear direction. Also, the insulating support legs 13a, 1
By arranging 3b in a slanted manner, a sufficient creepage distance for electrical insulation is secured, while streamlining makes it possible to reduce turbulence of the air flow. Furthermore, even if a Karman vortex is generated by making all the members relatively large, the Karman vortex frequency becomes low, the air resistance and noise are significantly reduced, and the air resistance is reduced by minimizing the number of members. The total energy of noise is significantly reduced.

According to this embodiment, the insulating support legs 13a, 1
Since three pedestals 3b support the pedestal 11, there is an effect that the insulating support legs 13a and 13b are stronger than the pitch moment and the roll moment due to aerodynamic force. Further, since the number of the insulating support legs 13a and 13b is as small as two, there is little effect of resistance and noise, and they are reduced, and the weight is reduced, and there is an effect that stain removal time is short and maintainability is improved. .. Furthermore, the insulating support leg 13
Since a and 13b are provided obliquely, the creepage distance for electrical insulation becomes longer, and there is an effect that sufficient insulation is secured. Further, the insulating support legs 13a and 13b are attached to the roof 12
Since it is arranged in the left-right direction from the front-rear center line, the influence of the wake of the insulating support leg 13a is less likely to reach the insulating support leg 13b, and the air resistance and noise can be further reduced. On the other hand, when the turbulence of the wake of the insulating support legs 13a and 13b is very small and the roll moment due to aerodynamic force is small, the insulating support legs 13a and 13b can be arranged on the front-rear center line.

Further, as shown in FIG. 7, two insulating support legs 13 are provided.
The a and 13b may be arranged diagonally in the left-right direction. Also,
If the insulating support legs 13a and 13b can be sufficiently long,
The surface can be made completely smooth without creases.

Next, another embodiment of the present invention will be described with reference to FIGS. In the figure, the same reference numerals as those used in the above-mentioned embodiment denote the same members. The support column 7x is formed integrally and is supported by the elevating arm 16a at the center of the opening 11a of the pedestal 11. Lifting arm 16a
Is pressed by the pressing spring 16b, and the current collecting contact plate 2 is pressed against the overhead wire 1. The actuator 16c generates a descent force to lower the elevating arm 16a. 17a
Is a cover for closing the opening 11 a of the pedestal 11. 1
Reference numeral 7b is a cover closing spring that acts to close the opening 11a by the cover 17a, and 17c is an actuator for opening the cover 17a when the hull 6 and the support column 7 are lowered by the elevating arm 16a.

According to this embodiment, since the boat body 6 and the supporting columns 7x can be stored in the pedestal 11 when the current is not collected, the air resistance and the noise can be further reduced when the power is not collected.

In the other embodiment described above, the cover 17a is structured to follow the vertical movement of the boat body 6 by the cover closing spring 17b and the actuator 17c.
It is also possible to omit 7b and the actuator 17c. In this case, the cover may be directly attached to the support column and operated simultaneously with the support column. With such a configuration, the structure can be simplified as compared with the other embodiments.

According to the current collectors of the above-mentioned one embodiment and the other embodiments, as shown in FIG. 11, compared with the conventional current collector of the curve A, each of the embodiments of the curve B has a noise of about 10 dB. It can be reduced. In addition, since the basic structure is similar between the one embodiment and the other embodiments, the noise levels are almost similar.

[0016]

As described above, according to the present invention, it is possible to reduce the air resistance and noise by reducing the number of constituent members.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a current collector according to the present invention.

FIG. 2 is a front view of the current collector of FIG.

3 is a plan view of the current collector of FIG. 1. FIG.

FIG. 4 is a side view showing a part of the current collector of FIG. 1 in section.

5 is a cross-sectional view of an insulating support leg made of only an insulator in the current collector of FIG.

6 is a cross-sectional view of an insulating support leg that forms a cable head in the current collector of FIG.

FIG. 7 is a front view of a current collector in which an insulating support leg is arranged to be inclined in the left-right direction according to another embodiment of the present invention.

FIG. 8 is a side view showing a part of another embodiment of the current collector according to the present invention in section.

9 is a front view showing a part of the current collector of FIG. 8 in section.

10 is a plan view showing a part of the current collector of FIG. 8 in section.

FIG. 11 is a graph showing changes in noise with respect to speed of a current collector according to the present invention and a conventional current collector.

[Explanation of symbols]

2 ... current collecting rails, 6 ... boat, 7 ... support pillars, 11 ... pedestal,
13a, 13b ... Insulating support legs.

Claims (3)

[Claims] 1. A current collecting strip contacting an overhead line, a streamlined boat supporting the current collecting strip, a streamlined support column supporting the boat so as to be movable in the vertical direction, and A current collector comprising a streamlined pedestal that supports the support column and an insulating support leg that has a streamlined horizontal cross section in the front-rear direction that supports the pedestal while maintaining electrical insulation on the roof of the vehicle. apparatus. 2. The current collector according to claim 1, wherein the two insulating support legs support the pedestal and are installed so as to be inclined in the front-rear direction. apparatus. 3. The current collector according to claim 1, wherein the insulating support leg is a cable head through which a conductor penetrates and the conductor is connected to a cable. ..