JPH0539038A - Attractive eddy current rail brake - Google Patents

Abstract

PURPOSE:To provide the above attractive eddy current rail brake with a high adhesion effect by resolving the problem that viscosity improving grains are hard to enter the gaps between wheels and a rail and no sufficient adhesion effect is obtained as observed in the attractive eddy current rail brake fitted with viscosity improving materials between magnetic poles. CONSTITUTION:Viscosity improving materials are fitted on both sides of magnetic poles at both ends of an electromagnetic coil 1, and viscosity improving grains scattered on a rail 4 by the friction of the viscosity improving material fitted on the rear side of the advance direction of a vehicle are sufficiently fed between the succeeding wheel 9 and the rail 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorption type eddy current rail brake which is operated by adding an adhesive force between a wheel and a rail in a railway vehicle to a brake force.

[0002]

2. Description of the Related Art A conventional adsorption type eddy current rail brake will be described with reference to the drawings. FIG. 1 shows an example in which an adsorption type eddy current rail brake is arranged between the axes of a bogie, and FIG. 2 is an enlarged view of an electromagnetic coil 1. 3 is a view of the electromagnetic coil shown in FIG. 2 as seen from below.

The electromagnetic coil 1 is loaded on the bogie frame 3 via, for example, the air cylinder 2, and is in a state of being lifted so as not to contact the rail 4 by injecting air into the air cylinder 2 during normal traveling of the vehicle. A direct current is caused to flow through the electromagnetic coil 1 according to a brake command of a predetermined condition, and at the same time, air is discharged from the air cylinder 2 using, for example, an electromagnet valve, and the electromagnetic coil 1 comes into contact with the rail 4 and adsorbs it. .

The inside of the electromagnetic coil 1 is as shown in FIGS. 2 and 3, and the coils 5 and 5a to 5g are iron cores 6 and 6a.
To g, and the sliding parts 7 and 7 on the bottom surfaces of the iron cores 6 and 6a to g.
The magnetic poles a to g are in contact with the mounting rail. The coils 5 and 5a to g are arranged such that the magnetic poles 7 and 7a to g are alternately arranged with N poles and S poles. In addition, the structure is such that the tackifying materials 8a to 8g are attached between the magnetic poles.

With the above structure, when the vehicle brakes under predetermined conditions, the electromagnetic coil 1 drops on the rail 4 in addition to the operation of the adhesive brake, and a direct current flows through the electromagnetic coil 1. Magnetic force is generated. Then, the electromagnetic coil 1 and the rail 4 are attracted by the magnetic force,
A frictional force is generated between the electromagnetic coil 1 and the rail 4 which is going to move in the vehicle traveling direction, and becomes a braking force of the vehicle.

On the other hand, since the magnetic poles 7 and 7a to 7g of the sliding electromagnetic coil 1 have N poles and S poles alternately arranged, an eddy current is generated in the rail 4 when the electromagnetic coil 1 passes, and the eddy currents are generated. The magnetic force generated by the electric current acts in the opposite direction to the magnetic force of the electromagnetic coil 1 with respect to the traveling direction of the vehicle, and the repulsive force becomes the braking force of the vehicle.

Further, during the operation of the rail brake, the pressure-sensitive adhesive materials 8a to 8g located between the magnetic poles 7 and 7a to 7g also rub, and the pressure-sensitive adhesive particles are scattered on the head surface of the rail 4.

[0008]

In the conventional adsorption type eddy current rail brake in which the tackifying material is attached between the magnetic poles, even if the tackifying particles are scattered on the rail during the operation of the rail brake, immediately after that, Since the magnetic pole that is in contact with the rail passes while rubbing the rail head surface, the magnetic pole sweeps out the increased adhesion particles scattered on the rail to the outside of the rail, so that the increased adhesion particles enter between the wheel and the rail. Therefore, there is a problem that a sufficient tackifying effect cannot be obtained. The present invention solves the problem found in the conventional adsorption type eddy current rail brake in which an adhesive increasing material is attached between the magnetic poles, and the adhesive increasing material is attached to the outside of the magnetic poles at both ends of the electromagnetic coil. Among the materials, the adhesion-increasing particles that are scattered on the rails by the friction of the adhesion-increasing material attached to the rear side when viewed from the vehicle traveling direction are configured to be sufficiently supplied between the wheel and the rail that will pass thereafter. It is an object of the present invention to provide an adsorption type eddy current rail brake having a high adhesion increasing effect.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to provide an adhesive increasing material outside the magnetic poles at both ends of an electromagnetic coil of an adsorption type eddy current rail brake, and to increase the adhesive during the operation of the rail brake. The material is characterized by friction with the rail.

[0010]

According to the present invention having the above-mentioned structure, since the tackifying particles dispersed on the rail due to the friction with the rail surely enter between the rail and the wheel, a high tacking effect can be obtained.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. 4 and 5 are enlarged views of the electromagnetic coil 1 of the present invention in FIG. 1 and the electromagnetic coil as seen from below, as in FIGS. 2 and 3 showing the electromagnetic coil of the conventional adsorption type eddy current rail brake. It is a figure. Adhesives 8 and 8h
Is attached to the outside of the magnetic poles 7 and 7g at both ends of the electromagnetic coil,
During the operation of the rail brake, the tackiness increasing material also slides on the rail 4 to spray the tackiness enhancing particles on the rail. For example, in FIG. 1, assuming that the traveling direction of the dolly is the direction of the wheel 9, the adhesion-increasing particles scattered from the adhesion-increasing material close to the wheel 9 among the adhesion-increasing materials attached outside the magnetic poles on both ends of the electromagnetic coil are electromagnetic coils. Although it is swept to the outside of the rail by No. 1, the tackiness increasing particles scattered from the tackiness enhancing material close to the wheel 9a can surely enter between the wheel 9a and the rail 4.

[0012]

As described above, according to the present invention, since the tackifying particles attached to the outer sides of the magnetic poles at both ends of the electromagnetic coil of the adsorption type eddy current rail brake are securely introduced between the rail and the wheel, the high tacking effect can be obtained. Adhesive effect can be realized. In addition, the adsorption type eddy current rail brake according to claim 2 is
Since the tackifying material is attached only to the outside of the magnetic poles on both ends of the electromagnetic coil, and the tacking material is not attached between the magnetic poles, not only does the tackifying material to be attached between the magnetic poles become unnecessary, but also between the magnetic poles, for example, a friction material is used. Can be installed.

[Brief description of drawings]

FIG. 1 shows an example in which an adsorption type eddy current rail brake is arranged between the axes of a bogie.

FIG. 2 is an enlarged view of an electromagnetic coil 1 of a conventional adsorption type eddy current rail brake.

FIG. 3 is a view of the electromagnetic coil shown in FIG. 2 viewed from below.

FIG. 4 is an electromagnetic coil 1 of the adsorption type eddy current rail brake of the present invention.

5 is a view of the electromagnetic coil shown in FIG. 4 as viewed from below.

[Explanation of symbols]

 1 Electromagnetic Coil 2 Air Cylinder 3 Bogie Frame 4 Rail 8 Adhesive Material 9 Wheel

Front page continuation (72) Inventor Toru Yukawa 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Japan Railway Company (72) Inventor Asaaki Kageyama 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Inside Japan Railway Company (72) Inventor Satoshi Takiguchi 1-6-5 Marunouchi, Chiyoda-ku, Tokyo Inside East Japan Railway Company

Claims (2)

[Claims] 1. An electromagnetic coil is arranged between shafts of a bogie for a railway vehicle so that magnetic poles of N poles and S poles alternate in the rail longitudinal direction, and the magnetic poles of the electromagnetic coils are attracted to the rail by a magnetic attraction force. And the frictional force when the magnetic pole rubs against the rail,
In the attraction type eddy current rail brake in which a magnetic force due to an eddy current generated in the rail when the electromagnetic coil passes through the rail head surface is combined to form a braking force, and an adhesion increasing material is attached between the magnetic poles, An adsorption type eddy current rail brake characterized in that an adhesive increasing material is attached to the outside of magnetic poles at both ends of the coil, and the adhesive increasing material rubs against the rail during operation of the rail brake. 2. The adsorption type eddy current rail brake according to claim 1, wherein an adhesive increasing material is attached only to the outside of the magnetic poles at both ends of the electromagnetic coil, and an adhesive increasing material is provided between the magnetic poles of the electromagnetic coil. Adsorption type eddy current rail brake characterized by a structure that is not attached.