JPH089506A - Current collector - Google Patents

Abstract

(57) [Summary] [Purpose] The difference in lift force depending on the traveling direction of the vehicle is significantly reduced, and it is to obtain good followability in both forward and backward traveling even at high speed traveling. In a current collector of a frame that is asymmetric in the front-rear direction with respect to the vehicle traveling direction, the current collecting boat has a cross-sectional shape that is asymmetric in the front-rear direction of the vehicle and is attached to the frame in the traveling direction of the vehicle. Of the direction in which the lifting force of the frame decreases,
It is mounted in a direction that matches the direction in which the lift of the asymmetrical current collecting boat increases.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector for railway vehicles.

[0002]

2. Description of the Related Art FIG. 6 is a block diagram showing a conventional single-arm type current collector, wherein 1 is a vehicle body, 2 is an insulator, 3 is an underframe of the current collector, 4 is a frame, and 5 is a frame. Collector boat, 6
Is an overhead line. The drive unit of the current collector is not shown,
It has a spring for raising the framework, and the current collecting boat contacts the overhead wire by a predetermined pushing force and collects electricity from the overhead wire and runs. When the vehicle travels, the current collector receives the traveling wind of the vehicle, and the aerodynamic force causes the current collector to generate lift. The value of lift generally increases in proportion to the square of the vehicle speed. The single-arm type current collector shown in FIG. 6 has a framework that is asymmetric in the front-rear direction of the vehicle. Therefore, if the traveling direction of the vehicle changes, the air flow changes and the lift force changes. Figure 7
Indicates that the vehicle is in the A direction in FIG. 6 (hereinafter referred to as the fluttering direction)
FIG. 3 shows an example of the lift generated when traveling in the direction B and in the direction B (hereinafter referred to as the anti-fluttering direction).

[0003]

As shown in FIG. 7, the magnitude of the lift force of the conventional single-arm type current collector during traveling greatly differs depending on the traveling direction of the vehicle. The value of lift is
When the vehicle travels at high speed when the contact force changes significantly due to the lift force, it is added to the predetermined push-up force initially set on the current collector and becomes the contact force between the current collector boat and the overhead line. There are the following defects. (1) When the vehicle travels in the fluttering direction, the lift force is large, the contact force is large, the abrasion of the contact plate increases, and the bending stress of the overhead wire also increases, so that the life of the overhead wire also becomes short. (2) When the vehicle travels in the anti-flutter direction, the lift force is small and the contact force is too small, resulting in poor followability during high-speed traveling and increased derailment.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks, and as a means thereof, the current collecting boat is attached to the frame as an asymmetrical shape in the longitudinal direction of the vehicle. This is a combination product of the framework and the collector boat, which makes the lift of the collector boat different depending on the direction of travel and compensates for the difference due to the lift of the framework or the difference in direction of travel. The difference in the lift force due to the difference in the traveling direction of the current collector is reduced.

[0005]

The operation of the device of the present invention will be described below. As shown in FIG. 7, the lift force of the conventional single-arm type current collector is
There is a big difference between the case where the vehicle travels in the fluttering direction and the case where the vehicle travels in the anti-flooding direction. As is apparent from the figure, the conventional single-arm type current collector shown in FIG.
Is symmetrical with respect to the traveling direction of the vehicle, and the framework 4 is asymmetric with respect to the front and rear. Since the lift force in FIG. 7 is the lift force of the current collector assembly, the lift force of the framework 4 and the lift force of the current collecting boat 5 are combined. Of these, since the current collector boat 5 is symmetrical in the front-rear direction, the lift is the same when traveling in the fluttering direction and when traveling in the anti-fluttering direction. Therefore, the difference between the lift forces in the fluttering direction and the anti-fluttering direction in FIG. 7 occurs because the frame 4 has an asymmetric shape in the front-rear direction.

The same can be said for the current collecting boat 5, and if the current collecting boat has an asymmetric shape in the front-rear direction, the lifting force of the current collecting boat varies depending on the traveling direction of the vehicle. Therefore, if the front and rear asymmetrical shape of the current collector boat is properly selected and the lift of the frame is large as the vehicle progresses in the fluttering direction, the current collector boat should be installed in the direction with the smaller lift force among the front and rear asymmetrical shapes of the current collector boat. By doing so, when the framework is moving in the anti-swing direction and the lift is small, the current collecting boat will be installed in the direction with the larger lift of the front and rear asymmetrical shapes, and the frame lifting force and the current collecting boat lift will be The lift of the assembly, which is the total value, cancels the lift of the framework and the collector boat when the framework advances in the fluttering direction.
When the frame moves in the anti-flutter direction, the lift forces of the frame and the current collector are synergized, and the difference between the lift force of the assembly and that of the anti-flutter direction is greater than that of the conventional case. It can be made much smaller, and can be contained within a range that does not hinder practical use.

[0007]

1 is a block diagram showing an embodiment of a current collector of the present invention, in which the same reference numerals as those in FIG. 6 designate the same parts or parts having the same functions. In FIG. 1, 11 and 12 are spindles that are pivotally supported by the underframe and fixed lower ends of lower frames 13 and 14, respectively, and upper ends 13a and 14a of the lower frames 13 and 14 are pivotally supported near the lower end and the lower end of the upper frame, respectively. ing. 15 and 16 are upper frames, upper frame 15
The upper end 15a pivotally supports the vicinity of the upper end of the boat support arm 17, and the upper frame
16 has a lower end 16a pivotally supported near the upper end of the lower frame 13 and an upper end 16b.
Supports the lower end of the boat support arm 17. Boat support arm
17 horizontally supports the current collecting boat 18 via a spring (not shown). As shown in FIG. 2, the current collector boat 18 has a shape similar to a parallelogram in cross section, and is asymmetric in the front-rear direction of the vehicle.

This current collector is constructed as described above. When the main shaft is rotated by the tension of the main spring (not shown) to raise the lower frame through the lever fixed to the main shaft, the current collecting boat 18 The top surface contacts the overhead wire with a predetermined pushing force to collect current, and the vehicle runs. The effect of the aerodynamic characteristics of the current collector of the present invention will be described below. FIG. 3 is a front and rear asymmetrical current collecting boat shown in FIG.
18 is a graph showing the relationship between the speed and the lift force, in the case of traveling in the direction of arrow C (direction A in FIG. 1), the lift force is generated downward, and in the direction of arrow D (direction B in FIG. 1) Occurs upwards. In other words, the lift of the current collecting boat has large and small differences depending on the traveling direction.

FIG. 4 is a comparative diagram showing the relationship between speed and lift of the current collector of the present invention shown in FIG. 1 in comparison with the case of a conventional current collector. In FIG. 4, when the curve advances in the fluttering direction (direction A in FIG. 6) in the conventional Hangul arm type current collector assembly shown in FIG. 7, the curve also advances in the anti-fluttering direction (direction B in FIG. 6). Indicates the lift force when The curved line shows the lift force of only the framework in the case of advancing in the sweep direction, and the curve shows the lift force of the frame only in the case of advancing in the anti-stroke direction. That is, the difference between the curved line and and is the lift of the conventional current collecting boat 5, and the difference L1 from the curved line is the lift due to the difference in the traveling direction of the conventional product.

Curves are the lift forces when the current collector of the present invention travels in the sweep direction and in the anti-slip direction, respectively, and the curves are the lift forces of only the framework when the current collecting boat 18 travels in the C direction shown in FIG. 2 is added to the curve, and the curve is obtained by adding the lift force in the D direction of the current collecting boat 18 shown in FIG. The difference L2 with the curve is the difference in lift force between advancing in the sweep direction and advancing in the anti-skip direction, and it is clear that it is much smaller than the lift difference L1 due to the difference in the advancing direction in the conventional product. is there. As described above, the current collecting device of the present invention is characterized in that it is configured by attaching the current collecting boat which is asymmetrical to the front and rear to the frame which is asymmetrical to the vehicle traveling direction. To provide a current collector having a small difference in lift force depending on the traveling direction.

FIG. 5 is a block diagram showing a second embodiment of the current collector of the present invention, in which the same reference numerals as those in FIGS. 1 and 6 designate the same parts or parts having the same functions. In FIG. 5, 21 and 22 are pivotally supported by the underframe, and the frames 23 and 22, respectively.
The spindle with the lower end of 24 fixed, frames 23 and 24 are the upper end 23 respectively.
a and 24a pivotally support the upper and lower ends of the boat support arm 25. The boat support arm 25 horizontally supports the current collection boat 18 via a spring (not shown).

The current collector is constructed as described above, and when the main shaft is rotated by the tension of the main spring (not shown) to raise the frame through the lever fixed to the main shaft, the current collecting boat 18
The upper surface of the vehicle comes into contact with the overhead wire with a predetermined push-up force to collect current and the vehicle runs. The aerodynamic characteristics of the current collector of the present invention are as follows. When the current collector shown in FIG. 5 travels in the direction of arrow E, the drag force of the traveling winds of the frames 23 and 24 acts in the direction of rotating the main shafts 21 and 22 in the clockwise direction, so that the lifting force of the frame is in the downward direction. , When dragging in the downward direction of the arrow, the drag acts in the direction of rotating the main shaft counterclockwise, so the lift force of the framework is in the upward direction, and eventually the lift force of the framework is small in the direction of arrow E,
It becomes larger in the direction of arrow F.

As shown in FIG. 3, the lift of the current collecting boat 18 is large when traveling in the direction of arrow D and small when traveling in the direction of arrow E. Therefore, as shown in FIG. In this case, if the current collecting boat 18 is installed in the direction in which the current collecting boat moves in the D direction, the lifting force of the framework and the lifting force of the current collecting boat are synergized in the E direction traveling and canceled in the E direction traveling, resulting in the assembly. As a result, the difference in lift force due to the difference in traveling direction can be greatly reduced. In the present embodiment, the current collecting boat has been described as an example of a parallelogram shape having a front-rear asymmetrical shape, but other shapes are inevitable in forward and reverse traveling as long as the shape is asymmetrical in the front-rear direction. Since the lift force is different, the effect is the same. Further, although the single-arm type current collector and the pole type are illustrated as the framework of the current collector, the same effect can be obtained even if the framework of other shapes is asymmetrical in the front and rear. be able to.

[0014]

As described above, the current collector of the present invention is different from the current collector having the frame structure which is asymmetric in the front-rear direction with respect to the traveling direction of the vehicle.
By installing a current collector boat that is asymmetrical in the front and rear, the difference in the lift force depending on the traveling direction of the vehicle is greatly reduced, and a current collector with good followability in both forward and backward traveling even at high speed traveling is provided. It is possible and the practical effect is enormous.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a current collector of the present invention.

FIG. 2 is a view showing a cross-sectional shape of a current collector boat of the current collector of the present invention.

FIG. 3 is a diagram showing a relationship between a speed and a lift of a current collecting boat of the current collector of the present invention.

FIG. 4 is a view showing the lifting forces of the framework and the assembly of the current collector of the present invention in comparison with the case of the conventional product.

FIG. 5 is a configuration diagram showing a second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a conventional single-arm type current collector.

7 is a diagram showing the relationship between vehicle speed and lift depending on the traveling direction of the single-arm type current collector shown in FIG.

[Explanation of symbols] 1 vehicle body 2 insulator 3 frame 4 frame 5 collector boat 6 overhead wire 11 spindle 12 spindle 13 spindle 13 lower frame 14 lower frame 15 upper frame 16 upper frame 17 boat support arm 18 collector boat 21 spindle 22 spindle 23 Frame 24 Frame 25 Boat support arm

Claims (3)

[Claims] 1. A current collector having a frame that is asymmetric in the front-rear direction of the vehicle and a current collecting boat, wherein the current collecting boat has a cross-sectional shape that is asymmetric in the front-rear direction of the vehicle. Further, the mounting direction with respect to the frame is such that, of the traveling direction of the vehicle, the direction in which the lift of the frame becomes smaller and the direction in which the lift of the asymmetrical current collecting boat becomes larger coincide with each other. A current collector. 2. Two main shafts (11, 12) as the framework
And two lower frames (13,14) and two upper frames (15,16)
And a boat support arm (17). The current collecting boat (18) is attached to the upper part of this frame, and the main shafts (11, 12) are rotatably mounted in the vehicle traveling direction. The lower frame (13, 14) is rotatably supported by the frame, and the upper ends (13a, 14a) of the lower frame (13, 14) are rotatably supported near the lower end and the lower end of the upper frame (15), and the lower end is fixed to the main shaft (11, 12). The frame (15) has its upper end (15a) pivotally supported near the upper end of the boat support arm (17), and the upper frame (16) has its lower end (16a) pivotally supported near the upper end of the lower frame (13). The upper end (16b) pivotally supports the lower end of the boat supporting arm (17), the boat supporting arm (17) horizontally supports the current collecting boat (18) via a spring, and the current collecting boat (18) is The current collector according to claim 1, wherein the current collector has a parallelogram shape whose cross section is asymmetric in the front-rear direction of the vehicle. 3. As the frame, two main shafts (21, 22)
It consists of two frames (23, 24) and a boat support arm (25). The current collecting boat (18) is attached to the upper part of this frame, and the main shafts (21, 22) are The frame (23, 24) is rotatably supported by the underframe so as to be rotatable with respect to the vehicle traveling direction. The arm (25) horizontally supports the current collecting boat (18) via a spring, and the current collecting boat (18) has a parallelogram shape whose cross section is asymmetric in the front-rear direction of the vehicle. The current collector described.