JP2000001102A - Insulated wheel for maintenance vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the insulated wheel for maintenance vehicle which is free from deterioration in insulation resistance, permitting significant reduction in repair costs. SOLUTION: A wheel 8 is formed by an inner wheel 9 which is made of an insulating material and mounted on the axle of the maintenance vehicle and a steel outer wheel 10 which is mounted on the outer periphery of the inner wheel 9. Monomer cast nylon or the like is adequate for the insulating material. Inner wheel of each of the left and right wheels 8, 8 of the maintenance vehicle is formed by insulating material. Accordingly, even if the vehicle travels on the track, each of the rails is not short circuited to each other, enabling traveling while insulated. In addition, the same insulating effect is obtained with a configuration where an entire wheel to be amounted on an axle 2 of the maintenance vehicle is formed by insulating material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated wheel for realizing insulated running of a maintenance vehicle used for construction and maintenance and inspection work of railway tracks and overhead lines.

[0002]

2. Description of the Related Art Generally, in the case of a train, the train electrically short-circuits the two rails on the left and right sides. Therefore, by measuring the resistance value in one closed section between traffic lights,
It is possible to detect whether or not a train has entered a certain closed section. That is, the position of the train can be automatically detected for each closed section. When a train enters a certain closed section, the traffic signal and the switch are automatically switched so that the subsequent train does not enter, and the operation is controlled so as to automatically prevent the collision of the train. Have been.

However, when a maintenance vehicle is used for replacing rails and sleepers of a railway line, tamping a ballast, inspecting an overhead line, and replacing a railroad, a maintenance vehicle is used so as not to short-circuit the two right and left rails. Since the vehicle is running with insulation, it is impossible to automatically detect the position of the maintenance vehicle. This means that multiple maintenance vehicles can
In many cases, entering the closed section and performing the intended work, and when the maintenance vehicle is stopped for a long time at a position near the railroad crossing and performs a predetermined work, the crossing barrier at the railroad crossing remains down, This is because it may cause a traffic obstacle on a general road crossing the railroad crossing. Furthermore, there is a case where the maintenance car travels in the reverse direction on the train line in relation to the base (reverse running), which causes damage to signal facilities such as railroad crossings.

In order to realize such an insulated running, in a conventional maintenance vehicle, as shown in FIG. 3, an intermediate portion of an axle 2 connecting left and right wheels 1a and 1b is cut off to form a flange. 2a and 2b are formed, and an insulating material 3 having a thickness of about 2 mm such as glass fiber, bakelite, or hard rubber is interposed therebetween, and the same insulating material 3 is provided between the bogie 4 and the support portion 5 of the axle 2. Insulation traveling is performed by interposing a.

[0005] Conventionally, as shown in FIG.
In each of the left and right wheels 1a, 1b, a wheel is constituted by an iron inner ring 6 and an outer ring 7, and the outer peripheral surface of the inner ring 6 and the outer ring 7
The same insulating material 3 as described above is disposed between the inner peripheral surface of
It has an insulating structure.

[0006]

However, the insulating material 3 has a problem of deterioration over time, and the insulating effect is reduced due to penetration of moisture and the like, and often causes line failures such as short-circuit of tracks. Particularly, in a maintenance vehicle to which a herbicide is sprayed, there is a problem because the wheel insulation resistance is deteriorated due to the harm of the herbicide. In addition, a lot of time and repair costs were required to maintain the insulation.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention has been improved and eliminated, and only the inner wheel of the inner and outer wheels or the entire wheel is formed of an insulating material. As a result, there is no problem of insulation resistance deterioration,
An object of the present invention is to provide an insulated wheel for a maintenance vehicle capable of greatly reducing repair costs.

[0008] In order to solve the above-mentioned problem, the present invention is applied to a maintenance vehicle traveling on rails of a railway line, comprising: an insulating material attached to an axle of the maintenance vehicle. An insulated wheel for a maintenance vehicle, wherein the insulated wheel is formed by an inner ring having a shape and an iron outer ring attached to an outer peripheral surface of the inner ring. According to the first aspect of the present invention, since the left and right wheels of the maintenance vehicle have inner ring portions formed of an insulating material, the rails do not short-circuit even when traveling on a railway line. Insulated running is possible.

According to a second aspect of the present invention, there is provided a maintenance vehicle running on rails of a railway track, wherein all wheels mounted on an axle of the maintenance vehicle are formed of an insulating material. Insulated wheels of a maintenance vehicle to be used. In this case, the entire wheel is made of insulating material,
Even if it runs on a railroad track, it is possible to run insulated without short-circuiting between rails.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the embodiments of the invention shown in the drawings. 1A and 1B relate to a first embodiment of the present invention. FIG. 1A is a longitudinal sectional view of a wheel 8, and FIG. 1B is a drawing showing a right half of the wheel 8 when viewed from an axle direction. It is. As shown in FIG. 1, a wheel 8 of this embodiment includes an inner ring 9 and an outer ring 10, and the inner ring 9 is formed of an insulating material such as monomer cast nylon (MC nylon), and the outer ring 10 is made of iron. It is. Monomer cast nylon has excellent chemical resistance, and also has tensile strength, compressive strength,
Excellent strength such as shear strength. Therefore, in terms of strength, it is sufficient as a wheel of a maintenance vehicle.

On the inner peripheral surface side of the inner ring 9, two concave portions 9a for mounting bearings for mounting on an axle are formed at both ends, and an uneven portion 11 is formed on the outer peripheral surface side. Further, on the inner peripheral surface side of the outer ring 10, an uneven portion 12 is formed corresponding to the uneven portion 11 of the inner ring 9. The inner ring 9 and the outer ring 10 are fitted to each other at these uneven portions 11 and 12, and the bolt 1 penetrating therethrough is formed.
The nut 3 and the nut 14 are integrally assembled. The outer ring 10 has a normal flange 1
0a is formed to prevent the maintenance vehicle from coming off the rail.

The thus constructed wheel 8 has an inner ring 9 attached to the axle 2 (see FIGS. 3 and 4) via a bearing (not shown), and is used as a wheel of a maintenance vehicle. In a maintenance vehicle to which such wheels 8 are attached,
Although the electricity flowing to the left and right rails is conducted to the iron outer ring 10, the electricity flowing to the left and right rails through the axle 2 is not short-circuited because it is insulated by the inner ring 9 made of an insulating material such as monomer cast nylon. .
Also, there is no short circuit from the axle 2 through the bogie 4. That is, the insulated running is possible. Moreover, since the insulation is realized by the inner ring 9 constituting the wheel 8, there is no problem of deterioration over time due to aging, spraying of herbicides or moisture. In addition, since the outer ring 10 is made of iron, it is possible to make the progress of abrasion of the portion of the flange 10a in contact with the rail approximately the same as that of a normal iron wheel.

FIG. 2 shows a wheel 15 according to a second embodiment of the present invention. The diagram (A) in FIG.
FIG. 2B is a drawing showing a half of the wheel 15 as viewed from the axle direction. As shown in FIG.
The whole wheel is made of, for example, monomer cast nylon (MC
It is formed of an insulating material such as nylon. On the inner peripheral surface side of the wheel 15, a total of two concave portions 15 a for mounting bearings are formed on both end sides. Further, a flange 16 is formed on the outer peripheral surface side to prevent the wheel from coming off by coming into contact with the rail. The mode of use of the wheel 15 and the operation and effect of the insulated running obtained thereby are the same as in the case of the first embodiment.

[0014]

As described above, in the present invention,
In a maintenance vehicle traveling on rails of a railway track, an inner ring made of an insulating material attached to an axle of the maintenance vehicle,
Since the wheel of the maintenance vehicle is formed by the iron outer ring attached to the outer peripheral surface side of the inner ring, even when traveling on the railway line, the conduction of electricity from the rail is interrupted at the inner ring portion, and the rails are connected. There is no short circuit. That is, the insulated running is possible. Moreover, since the insulation is realized by the inner ring constituting the wheel, there is no problem of deterioration over time due to aging, spraying of herbicides or moisture. Further, since the outer ring is made of iron, it is possible to make the progress of the wear of the flange portion in contact with the rail approximately the same as that of a normal iron wheel. Further, when the inner ring is made of an insulating material such as monomer cast nylon, the weight of the entire wheel can be significantly reduced, and the handling of the wheel is convenient in replacement work and the like.

Further, in the present invention, the whole wheel mounted on the axle of the maintenance vehicle is made of an insulating material. In this case, the same insulated running as described above can be realized. is there.

[Brief description of the drawings]

FIG. 1 shows a wheel according to a first embodiment of the present invention. FIG. 1 (A) is a longitudinal sectional view, and FIG. 1 (B) is a drawing showing a half as viewed from an axle direction.

FIGS. 2A and 2B show a wheel according to a second embodiment of the present invention. FIG. 2A is a longitudinal sectional view, and FIG. 2B is a view showing a half as viewed from the axle direction.

FIG. 3 is a front view showing an insulation structure of a conventional maintenance vehicle.

FIG. 4 is a front view showing another insulating structure of the conventional maintenance vehicle.

[Explanation of symbols]

2 axle, 8 wheels, 9 inner ring, 10 outer ring, 15 wheels

Claims (2)

[Claims] 1. A maintenance vehicle running on rails of a railway track, wherein an inner ring made of an insulating material is attached to an axle of the maintenance vehicle, and an iron outer ring is attached to an outer peripheral surface side of the inner ring. Insulated wheels for maintenance vehicles. 2. A maintenance vehicle running on rails of a railway track, wherein all wheels mounted on the axle of the maintenance vehicle are formed of an insulating material.