JPH08331702A - Single arm pantograph - Google Patents

Abstract

(57) [Abstract] [Purpose] The upper frame consisting of the upper frame of the single-arm pantograph and the balance rod generates wind noise due to the running wind received while the vehicle is traveling at high speed, and reduces that noise to prevent noise pollution. To do. At the same time, the fluctuation of the pushing force of the pantograph with respect to the overhead wire of the current collecting boat is reduced to improve the current collecting efficiency. [Structure] The upper frame is formed of a metal hollow tube, and a balance rod is incorporated therein. A forked end plate is provided at the tip of the lower frame, and a support shaft is attached between them. A lower end boss attached to the upper frame is rotatably supported on the shaft via a bearing. A flat portion is provided on the main shaft side of the central portion of the support shaft, and a bracket with a vertical groove is attached to the flat portion, and the lower end portion of the balance rod is rotatably supported by the pin in the groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single arm type pantograph for railway vehicles.

[0002]

2. Description of the Related Art The following is known as a conventional single-arm type pantograph. FIG. 4 is a schematic view showing the mechanism, FIG. 5 is a side view of the connecting portion in FIG. 4, and FIG. 6 is a sectional view taken along the arrow line in FIG. In FIG. 4, 1 is an underframe, 2 and 3 are main shafts pivotally supported by the underframe 1, 4,
5 is a lower frame whose lower ends are fixed to the main shafts 2 and 3, respectively, 6 is a connecting part near the lower ends and an upper frame whose lower ends are rotatably supported by connecting parts 4a, 5a at the upper ends of the lower frames 4, 5. Reference numeral 7 denotes an auxiliary frame (hereinafter referred to as a balance rod) whose lower end is rotatably supported by a connecting portion 4b near the upper end of the lower frame 4, and 8 denotes an upper end 6a of the upper frame 6 and an upper end 7a of the balance rod 7, respectively. A freely supported boat support arm has a current collecting boat 9 attached to its upper end. 10 is an overhead line. The structure of the connecting portions 4a and 4b in FIG. 4 will be described with reference to FIGS.
The upper end of is divided into two-forked portions 4c into which the support shaft 11 is inserted, and the upper frame 6 is inserted through the bearing 12 fitted on the support shaft 11.
Is rotatably supported. The lower end of the balance rod 7 is rotatably supported by the forked portion 4c of the lower frame 4 via a pin 13.

The pantograph is mounted on the roof of a vehicle body, and the main shaft 2 is rotated by the tension of a spring (not shown) arranged on the underframe 1 to raise the pantograph frame and the collector boat to the overhead line. The vehicle travels by contacting with a predetermined pushing force to collect current. Further, the main shaft 2 is rotated by the pneumatic force of a lowering cylinder (not shown), the pantograph framework is lowered, and the pantograph is folded.

When the frame moves up and down, the upper surface of the collector boat must always be kept parallel to the overhead line, which is done by the following mechanism. In the lower frames 4, 5 and the upper frame 6, the positions of the main shafts 2, 3 which determine the positions of the lower ends of the lower frames, the lengths of the lower frames 4, 5 and the upper frame 6, and the lower frames 4, 5 of the upper frame 6, By appropriately selecting the connecting portions 4a and 5a of the above, the upper end 6a of the upper frame is configured to vertically move up and down approximately when the frame moves up and down. Also, the lower frame 4
By appropriately selecting the position of the support point 4b of the balance rod 7 and the length of the balance rod 7, the upper ends 6a and 7a
The boat support arm 8 supported by and is constructed so as to keep almost vertical when the frame moves up and down. With the above configuration, the boat support arm 8 holds the vertical position during the ascent and descent of the frame, so that the upper surface of the current collecting boat 9 attached to the boat support arm 8 always maintains the horizontal position.

[0005]

When the vehicle is traveling,
The pantograph receives the traveling wind of the vehicle and generates aerodynamic noise (hereinafter referred to as wind noise). It is said that the wind noise increases in proportion to the sixth power of the speed, and the conventional pantograph has a drawback that a large wind noise is generated when the vehicle travels at high speed. The present invention has been made in view of the above-mentioned drawbacks, and provides a pantograph in which a wind noise is reduced by aerodynamically forming one upper frame of a pantograph frame having particularly strong wind contact. .

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems in conventional products, the present invention relates to a conventional single-arm pantograph having an upper frame assembly composed of two members, an upper frame 6 and a balance rod 7. Is aerodynamically as a single member, and its means will be described below.

That is, in order to aerodynamically form a single member, the upper frame has a hollow pipe structure, and a balance rod is built into the upper frame so that the appearance is a single member of the upper frame. However, in the conventional single-arm pantograph framework structure, the support point 4b of the balance rod is located on the lower frame 4, and this point is how the connecting portion 4b between the lower frame 4 and the upper frame 6 is connected.
It is difficult to configure the balance rod 7 to be housed in the upper frame 6 due to interference between parts such as shafts and bearings that make the connecting portions 4a and 4b rotatable even when they are brought close to a. Met. The present invention has the following structure in order to solve the difficulty of the configuration of this portion.

That is, in the connecting portion 4a between the lower end of the upper frame 6 and the upper end of the lower frame, the support shaft that rotatably supports the upper frame from the upper end of the lower frame and the upper end of the lower frame do not rotate relative to each other. It is characterized in that the lower end of the balance rod is rotatably supported by a bracket that is fixed and is attached to the support shaft.

[0009]

In the single arm type pantograph of the present invention, the balance rod mounting portion at the upper end of the lower frame is constructed as described above, and its operation will be described. In a conventional pantograph, a connecting portion between the upper end of the lower frame and the lower end of the upper frame is composed of a lower frame upper end member, an upper frame lower end member, a support shaft, etc., and the rotation of the upper frame with respect to the lower frame is as shown in FIG. The structure is such that the lower frame member 4c and the support shaft 11 can rotate and the support frame 11 and the upper frame member 6 can rotate. In the present invention, the lower frame member and the support shaft are fixed to each other so that they do not rotate, and the support shaft and the support shaft function as the lower frame member. A bracket is attached to this support shaft at one position between the upper frame member and the lower end of the balance rod so as to be rotatable from the bracket. With the above structure, the support point at the lower end of the balance rod can be installed very close to the center of the connection point between the lower frame and the upper frame, and the support point at the lower end of the balance rod can be installed in the hollow upper frame pipe. It can now be housed in. An embodiment of the present invention will be described in detail below with reference to the drawings.

[0010]

1 is an explanatory view showing the mechanism of a single-arm pantograph of the present invention, FIG. 2 is a sectional view of the connecting portion between the lower frame and the upper frame in FIG. FIG. 6 is a sectional view taken along line Woo in FIG. 1 to 3, parts having the same reference numerals as those in FIGS. 4 to 6 are the same parts or parts having the same function. 1-3, 14,
15 is a lower frame whose lower ends are fixed to the main shafts 2 and 3, respectively, 16 is a point near the lower ends and an upper frame whose lower ends are rotatably supported by upper ends 14a and 15a of the lower frames 14 and 15, and 17 is a lower end. Upper edge 14 of lower frame 14
A balance rod that is rotatably supported by a portion and is built in a hollow upper frame 16, and 18 is an upper end 16a of the upper frame 16 and a balance rod.
A current collecting boat 9 is attached to the upper end of the boat support arm, which is rotatably supported on the upper end 17a of the boat 17.

2 and 3 are views showing the detailed structure of the upper end 14a of the lower frame 14, the lower frame 14 having an upper end and a lower frame end plate 14b,
The lower end boss 16b of the upper frame 16 is arranged between the two halves of the upper frame 16 and the supporting shaft 19 is fastened and fixed to the lower frame end plate 14b at the head 19b. 16 bottom boss 16
b is rotatably supported via a bearing 20. In addition, the central portion of the support shaft 19 has a flat surface 19a that is cut away from the central portion.
The bracket 21 is fastened, and the lower end of the balance rod 17 arranged inside the hollow upper frame 16 is rotatably supported by the pin 22 from the lower frame 14 to which the support shaft 19 is fixed via the bracket 21. ing. 23 is a lid required for assembly.

As described above, in the pantograph of the present invention, the supporting shaft for rotatably supporting the upper frame is fixed to the upper end of the lower frame at the connecting portion near the lower end of the upper frame at the upper end of the lower frame, and the bracket is attached from the supporting shaft. It is characterized in that the lower end of the balance rod is rotatably supported by means of this structure. With this configuration, the distance between the center of the support shaft and the center of the lower end of the balance rod can be reduced to the utmost limit. It is possible to arrange the inside of the above to form a single upper frame in appearance.

Since the ascending / descending function of the pantograph of the present invention is the same as that of the conventional single arm pantograph, the description thereof will be omitted. Regarding the aerodynamic effect when the vehicle travels at high speed, the structure as described above makes it possible to reduce the air resistance and wind noise because the outer frame has only one appearance. Have

[0014]

As described above, according to the present invention, by incorporating the balance rod in the upper frame of the single-arm type pantograph, the upper frame becomes one in appearance and aerodynamically. Has a great effect on the reduction of

[Brief description of drawings]

FIG. 1 is an explanatory view showing a mechanism of a single arm type pantograph of the present invention.

FIG. 2 is an illustration of the connecting portion between the lower frame and the upper frame in FIG.
FIG. 6 is a sectional view taken along the line EE.

FIG. 3 is a cross-sectional view taken in the direction of arrow W-w of FIG.

FIG. 4 is a schematic view showing a mechanism of a conventional single-arm type pantograph.

FIG. 5 is a side view of the connecting portion in FIG.

FIG. 6 is a sectional view taken along the arrow line AA in FIG.

[Explanation of symbols]

 1 frame 2 spindle 3 spindle 4 lower frame 5 lower frame 14 lower frame 15 lower frame 6 upper frame 16 upper frame 7 balance rod 17 balance rod 8 boat support arm 18 boat support arm 9 current collecting boat 10 overhead line 11 support shaft 19 support Shaft 12 Bearing 20 Bearing 21 Bracket 22 Pin 23 Lid

Claims (2)

[Claims] 1. A pivot shaft for rotatably supporting between the upper frame and the lower frame is fixed to the upper end of the lower frame at a pivotally connecting point between the lower frame upper end and the upper frame lower end of a single-arm pantograph. The single-arm pantograph is characterized in that the lower end of the auxiliary frame is rotatably supported by the support shaft. 2. A bracket is attached to the support shaft instead of rotatably supporting the lower end of the auxiliary frame from the support shaft, and the lower end of the auxiliary frame is rotatably supported from the bracket. Single arm pantograph.