JP2004243919A - Short-circuiting device for rolling stock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To actuate a track circuit without fail even if it is formed by a rolling stock having a truck in which wheels and axles are arranged via bearings or slide surfaces. <P>SOLUTION: A short-circuiting device is provided. According to the device, short-circuit conductors 72a, 72b are connected to grounding devices 71a, 71b at respective one ends, and to a terminal block 73 at the other respective ends. Short-circuit conductors 76a, 76b are connected to bearing support blocks 35a, 35b at respective one ends via bolt fastening or the like, and to a terminal block 77 at the other respective ends. The bearing support block 35a, 35b are mounted on outer cylinders 30a, 30b, respectively, to compose a part of a fixing part. The grounding devices 71a, 71b are set directly on the fixing part without an interposing insulating material. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a short-circuit device for a railway vehicle including a bogie in which left and right wheels and an axle are disposed via bearings or sliding surfaces.
[0002]
[Prior art]
Various bogies have been developed as bogies for railway vehicles.For example, in order to solve problems such as power transmission efficiency and noise, bogies equipped with wheel-integrated main motors with independent drive systems for each wheel, and tracks with different gauges (For example, refer to Patent Literature 1; corresponds to all claims).
[0003]
Incidentally, there is a so-called track circuit as a security facility for detecting whether or not a railroad vehicle exists in a certain section on a track. This track circuit electrically divides a line into fixed sections and applies a predetermined voltage between left and right rails. Then, when the railcar is present in the section, the fact that the railcar is present in the section is detected by utilizing the fact that the left and right rails are short-circuited by the wheels and the axle. .
[0004]
[Patent Document 1]
JP-A-2002-233005
[Problems to be solved by the invention]
However, there is a problem that it is difficult to operate the track circuit in a bogie equipped with a wheel-integrated electric motor of each wheel independent drive type or a bogie of a variable gauge train. That is, for example, in a wheel-integrated electric motor of each wheel independent drive system, the wheels are rotatably supported on the axle via bearings. For this reason, while the wheel is rotatable integrally with the rotor with respect to the stator fixed to the axle, it is difficult to operate the track circuit because the wheel and the axle are not electrically connected.
[0006]
Further, the same problem arises also in the variable gauge bogie because the wheels need to slide in the axle direction with respect to the axle. That is, not only when there is a bearing, but also, the sliding surface is coated with oil in order to promote smooth sliding, and is in a state close to insulation.
[0007]
An object of the present invention is to reliably operate a track circuit even in a railway vehicle provided with a bogie in which left and right wheels and an axle are disposed via bearings or sliding surfaces.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is
A short-circuit device for a railway vehicle including a bogie in which left and right wheels and an axle are disposed via bearings or sliding surfaces,
A sliding contact (for example, a grounding device 71b in FIG. 1) that contacts the wheel is provided on each of the left and right wheels,
A first short-circuit path for short-circuiting between the sliding contacts is provided.
[0009]
Further, the invention according to claim 2 is characterized in that the left and right outer cylinders (for example, the outer cylinder 30b in FIG. 1) which slide the axle in the axial direction via the sliding surface, and the left and right outer cylinders via bearings (E.g., the wheel 40b in FIG. 1) attached to the rail, and a short-circuit device for a railway vehicle including a bogie with a variable gauge.
A sliding contact (for example, a grounding device 71b in FIG. 1) that contacts the wheel is provided on each of the left and right wheels,
A first short-circuit path for short-circuiting between the sliding contacts is provided.
[0010]
According to the first and second aspects of the present invention, since the short-circuit path for short-circuiting the left and right wheels via the sliding contact is formed, the track circuit can be reliably operated.
[0011]
According to a third aspect of the present invention, there is provided the railway vehicle short-circuit device according to the first or second aspect,
The bogie has an outer rotor type wheel-integrated main motor of each wheel drive system,
By disposing each of the sliding contacts on the fixed portion of the bogie so as to be able to conduct with the fixed portion, and electrically connecting the stators of the left and right main motors which are one of the fixed portions. It is characterized in that a second short-circuit path is formed.
[0012]
According to the second aspect of the present invention, it is possible to form the second short-circuit path in which the left and right wheels are short-circuited through the wheel-sliding contact-fixing portion (the stator of the main motor). Further, since the second short-circuit path and the first short-circuit path are connected in parallel, the impedance between the left and right wheels can be reduced, and the track circuit can be more reliably operated.
[0013]
In this case, as in the invention according to claim 4, the bogie in the short-circuit device for a railway vehicle according to claim 3 sends cooling air to the left and right main motors at the center of the axle between the left and right main motors. (For example, the hood 60 of FIG. 1), a second short-circuit path is formed by arranging a lead wire connecting the stators of the left and right main motors in the wind path. Is also good. In this case, since the second short-circuit path, that is, the conductor can be shortened, the resistance of the conductor can be reduced.
[0014]
In addition, according to the invention of claim 5, the bogie according to claim 3 or 4 is configured to send cooling air to the left and right main motors at a central portion of the axle between the left and right main motors without wiring. The wind path may include an air path (for example, the hood 60 in FIG. 1) whose skeleton is formed of a conductor, and the second short-circuit path may be formed by the skeleton of the air path. Good. In addition, it goes without saying that the invention according to claim 6 may be applied together with the conductor according to claim 5.
[0015]
Further, the sliding contact according to any one of claims 1 to 5 may be constituted by a grounding device as in the invention according to claim 6.
[0016]
According to the sixth aspect of the present invention, since the grounding device is usually provided on the bogie, there is no need to develop / install a new device for operating the track circuit, and a short circuit device can be realized at low cost and easily. it can.
[0017]
As a first short-circuit path of the short-circuit device for a railway vehicle according to any one of claims 1 to 6, for example, as in the invention according to claim 7, a lead wire for electrically connecting between sliding contacts. The short-circuit device may be configured to include In this case, the first short-circuit path can be formed by a direct and simple method.
[0018]
Further, as in the invention according to claim 8, each of the sliding contacts of the short-circuit device according to any one of claims 1 to 7 is disposed on a fixed portion of the bogie so as to be able to conduct with the fixed portion. It is good also as. In this case, the wheel and the fixed portion are short-circuited, and a short-circuit path that short-circuits between the left and right wheels via the fixed portion can be formed. Further, since the short-circuit path is parallel to the first short-circuit path, the impedance between the left and right wheels can be reduced, and the track circuit can be more reliably operated.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Note that, as an embodiment, a bogie of a powered vehicle (locomotive) will be described as an example, but the present invention is also applicable to bogies such as passenger cars other than the powered vehicle. Further, the embodiment will be described by using a grounding device provided in a powered vehicle. However, it is needless to say that a sliding contact for slidingly contacting each wheel may be provided instead of the grounding device. .
[0020]
[First Embodiment]
The first embodiment is an embodiment in which the present invention is applied to a bogie of a train with variable gauge, in which a main motor is an outer rotor type wheel-integrated motor of each wheel drive type. FIG. 1 is a diagram illustrating a (a) cross-sectional configuration and (b) an outer shape of a main motor 10b related to one wheel.
[0021]
In FIG. 1, a cylindrical cylinder (outer cylinder 30b) is disposed outside the axle 20, and wheels 40b, a main motor 10b, and the like are disposed on the outer cylinder 30b. The stator 11b of the main motor is fixedly disposed on the outer cylinder 30b. The rotor 12b of the main motor and the wheel 40b are bolted together, and integrally rotate on the outer cylinder 30b via the tapered roller bearing 50b and the main motor side bearing 36b. That is, the axle 20, the outer cylinder 30b, and the stator 11b are fixed portions that do not rotate, and the wheels 40b and the rotor 12b are rotating portions. Therefore, the left and right wheels rotate independently. A sliding bearing is mounted inside the outer cylinder 30b, and the outer cylinder 30b is configured to be slidable on the axle 20 in the left and right directions in the axial direction, and is moved in accordance with the gauge.
[0022]
The bellows-shaped hood 60 on the left side in the figure is expanded and contracted by a standard gauge / narrow gauge, forms an internal space for guiding cooling air to the main motor 10b, and controls cooling air sent from the ventilation duct 61. This is an air path leading to the main motor 10b. The lead wire 13b to the armature coil of the main motor 10b is wired, but the ground wire is connected to a bearing support 35b that rotatably supports a rotating unit via a main motor side bearing 36b. The bearing support 35b is fixedly arranged at the center of the axle on the outer cylinder 30b. That is, the bearing support 35b and the outer cylinder 30b are in a state of being electrically connected.
[0023]
Here, the grounding device 71b will be described. In a general bogie, wheels and axles are integrated. For this reason, after the electric power on the vehicle is collected by the pantograph, it is passed from the axle to the rail through the wheels by the grounding device attached to the axle. However, in a truck with a variable gauge, there is a bearing (for example, a tapered roller bearing 50b) between the axle 20 and the wheel 40b. Therefore, if a grounding device is attached to the axle 20 as in the related art, current flows through the bearing. The problem of electrolytic corrosion occurs. Therefore, the current collecting ring 41b is attached to the boss portion of the wheel 40b, and the grounding device 71b is configured by the grounding brush urged to contact the current collecting ring 41b.
[0024]
Next, the configuration of the short-circuit device will be described.
2A and 2B are diagrams showing the main motor of FIG. 1 for both left and right wheels, wherein FIG. 2A shows a state of a standard gauge, and FIG. 2B shows a state of a narrow gauge. Note that the lowercase letters are codes for identifying the left and right of each member.
[0025]
The short-circuiting device includes (1) short-circuiting wires 72a and 72b for electrically connecting the left and right grounding devices 71a and 71b, and (2) short-circuiting wires 76a and 76b for electrically connecting the left and right fixing portions. Further, (3) the grounding devices 71a and 71b are electrically installed directly on the outer cylinder without using an insulator.
[0026]
One end of each of the short-circuiting wires 72a and 72b of (1) is connected to the grounding devices 71a and 71b, and the other end is connected to the terminal block 73. Therefore, a short-circuit path that electrically connects the wheels 40a and 40b is formed by passing through the grounding device 71a, the short-circuiting wire 72a, the terminal block 73, the short-circuiting wire 72b, and the grounding device 71b. As a result, since the wheels 40a and 40b are short-circuited, the track circuit can be operated.
[0027]
One end of each of the short-circuiting wires 76a and 76b of (2) is connected to the bearing support bases 35a and 35b by bolting or the like, and the other end is connected to the terminal block 77. Further, the short-circuiting wires 76a and 76b are bound with the lead wires 13a and 13b of the main motors 10a and 10b, and are wired.
[0028]
The bearing supports 35a and 35b are attached to the outer cylinders 30a and 30b as described above, and constitute a part of the fixed portion. Therefore, a short-circuit path that electrically connects the outer cylinder 30a and the outer cylinder 30b is formed by passing through the bearing support 35a, the short-circuit conductor 76a, the terminal block 77, the short-circuit conductor 76b, and the bearing support 35b.
[0029]
In addition, the grounding devices 71a and 71b are usually installed on the fixed portion via an insulator in order to collect electricity and flow the wheel 40, but in the present embodiment, the fixed portions are not interposed by the insulator. Installed directly in As a result, the fixed portion, that is, the outer cylinder 30 and the wheel 40 are short-circuited, and the short-circuit path formed by the short-circuiting wires 76a and 76b of (2) is connected to the left and right wheels 40a and 40b. It becomes. That is, the short-circuit path formed by the short-circuit conductors 72a and 72b of (1) and the short-circuit path formed by the short-circuit conductors 76a and 76b of (2) are connected in parallel. The impedance can be reduced, and the track circuit can be operated more reliably.
[0030]
Although the short-circuiting wires 76a and 76b are described as being wired in the same manner as the lead wires 13a and 13b, they may be wired as follows. 3A and 3B are diagrams showing a modification of the wiring of the short-circuiting wires 76a and 76b, where FIG. 3A shows a state of a standard gauge, and FIG. 3B shows a state of a narrow gauge. In FIG. 3, the terminal block 77 is disposed in the hood 60 substantially at the center of the axis. The short-circuit conductors 76a and 76b are bent according to the state of the standard gauge / narrow gauge with variable gauge, but since the short-circuit conductors 76a and 76b can be shortened, the resistance related to the wiring length can be reduced. . Further, the terminal block 77 may be moved according to the state of the standard gauge / narrow gauge, and may be supported in a state where the short-circuiting wires 76a and 76b are stretched.
[0031]
Further, the framework of the hood 60 may be made of a conductor such as a metal. Since the hood 60 is fixed to the fixed portion, the hood 60 short-circuits between the left and right fixed portions, that is, between the stators of the left and right main motors 10a and 10b and between the left and right outer cylinders 30a and 30b. It will be. Thus, a short-circuit path may be provided.
[0032]
[Second embodiment]
The second embodiment is a form in which the present invention is applied to another bogie of a variable gauge train, and is a bogie of a parallel cardan drive system. FIG. 4 is a diagram showing a schematic configuration of a cross section of a wheel axle in a narrow gauge state.
[0033]
4, an axle box 191 having wheels 141 and tapered roller bearings 192 is attached to an outer outer cylinder 131 installed outside the axle 120. A slide bearing is attached to the inside of the outer cylinder 131, and the wheel 141, the axle box 191, and the outer cylinder 131 are integrally slid to the left and right according to the gauge.
[0034]
The axle 120 is designed such that the diameter on the shaft end side is smaller by a predetermined length than the center portion of the axle, and the inner outer cylinder 132 is installed outside the axle 120 on the axle end side. A roller type spline 180 is disposed between the inner outer tube 132 and the outer outer tube 131 to transmit the rotational torque and, at the same time, convert the outer outer tube 131 to the left and right by the roller type spline 180 during the conversion between the gauges. Slide.
[0035]
Further, the power of the electric motor is transmitted directly to the axle via the reduction gear device 190 and the like. That is, the power is transmitted to the axle 120, the inner outer cylinder 132, the roller type spline 180, the outer outer cylinder 131, and the wheels 141. Therefore, the axle 120, the inner outer cylinder 132, the roller-type spline 180, the outer outer cylinder 131, and the wheel 141 form a rotating unit, and the left and right wheels rotate integrally.
[0036]
However, the axle box 191 disposed on the outer cylinder 131 via the tapered roller bearing 192 serves as a fixed portion. In the second embodiment, a grounding device 171 is provided on the axle box 191. That is, the grounding device 171 is configured by arranging the grounding brush on the axle box 191 so as to contact the wheel 141. Then, the grounding device 171 is provided in the left and right axle boxes 191, and this is connected with the short-circuiting conductor 176. As a result, a short-circuit path for electrically connecting the left and right wheels 141 is formed, and the track circuit can be operated.
[0037]
Although the two embodiments have been described above, the present invention is not limited to the contents of the above embodiments, and can be appropriately changed without departing from the spirit of the present invention. For example, although the bogie of the first embodiment has been described as a bogie with a variable gauge, the bogie is not variable with gauge, but simply employs an outer rotor type wheel-integrated wheel type electric motor. It may be. Even in this case, the wheel 40b is rotatably supported by the axle 20 via the bearing. Therefore, it is difficult to operate the track circuit because of the problem of electrolytic corrosion caused by the bearing. However, the track circuit is operated by applying the short-circuit device of the first embodiment such as the grounding device 71b. It is possible.
[0038]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, even if it is a railroad vehicle provided with the bogie in which a wheel and an axle are arranged via a bearing or a sliding surface, the left and right wheels are contacted by a sliding contact or the like that contacts each of the left and right wheels. A short-circuit path is formed to short-circuit between them, and the track circuit can be operated. Further, by providing a plurality of short-circuit paths in parallel, the impedance between the left and right wheels can be reduced, and the track circuit can be more reliably operated.
[Brief description of the drawings]
FIG. 1 is a diagram showing a cross-sectional configuration and an outer shape of a main motor according to a first embodiment.
FIG. 2 is a view showing both right and left wheels of the main motor of FIG. 1;
FIG. 3 is a diagram showing a modification of the wiring of the short-circuiting conductor according to the first embodiment.
FIG. 4 is a diagram showing a schematic configuration of a cross section of a wheel axle according to a second embodiment.
[Explanation of symbols]
10a, 10b Main motors 11a, 11b Stators 12a, 12b Rotors 13a, 13b Leads 20, 120 Axles 30a, 30b Outer cylinders 40a, 40b, 140 Wheels 50a, 50b Tapered roller bearings 60 Hoods 71a, 71b, 171 Grounding device 72a, 72b, 76a, 76b, 176 Shorting conductor

Claims (8)

A short-circuit device for a railway vehicle including a bogie in which left and right wheels and an axle are disposed via bearings or sliding surfaces,
A sliding contact that contacts the wheel is provided on each of the left and right wheels,
A short-circuit device for a railway vehicle, comprising a first short-circuit path for short-circuiting between the sliding contacts. A short-circuit device for a railway vehicle equipped with a rail-to-rail variable bogie having left and right outer cylinders sliding axially on an axle via sliding surfaces, and wheels attached to the left and right outer cylinders via bearings, respectively. And
A sliding contact that contacts the wheel is provided on each of the left and right wheels,
A short-circuit device for a railway vehicle, comprising a first short-circuit path for short-circuiting between the sliding contacts. In claim 1 or 2,
The bogie has an outer rotor type wheel-integrated main motor of each wheel drive system,
By disposing each of the sliding contacts on the fixed portion of the bogie so as to be able to conduct with the fixed portion, and electrically connecting the stators of the left and right main motors which are one of the fixed portions. A short-circuit device for a railway vehicle, wherein a second short-circuit path is formed. In claim 3,
The bogie includes an airway for sending cooling air to the left and right main motors in a central portion of the axle between the left and right main motors,
A short-circuit device for a railway vehicle, wherein a conductor connecting between the stators of the left and right main motors is wired in the wind path to form the second short-circuit path. In claim 3 or 4,
The bogie has a wind path for sending cooling air to the left and right main motors at a central portion of the axle between the left and right main motors, and an air path having a skeleton formed of a conductor,
The short-circuit device for a railway vehicle, wherein the second short-circuit path is formed by the frame portion of the wind path. In any one of claims 1 to 5,
The short-circuit device for a railway vehicle, wherein the sliding contact is a grounding device. In any one of claims 1 to 6,
A short-circuit device for a railway vehicle, comprising: a conductive wire for electrically connecting the sliding contacts to form the first short-circuit path. In any one of claims 1 to 7,
A short-circuit device for a railway vehicle, wherein each of the sliding contacts is disposed on a fixed portion of the bogie so as to be able to conduct with the fixed portion.

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