JP2001341502A - Wheel device for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel device for a rolling stock preventing wheels from being lifted during travel even in high-speed turning. SOLUTION: This wheel device for the rolling stock has iron wheels 17 rotated on railroad rails 16, and derailment preventing annular flanges 18 protrusively provided along the outer peripheral edges at the side face parts of the iron wheels 17. The wheel device is rotatably mounted to both end parts of an axle 13 of the rolling stock (a) and rotated on the rails 16 to allow a rolling stock body 11 to travel. The flanges 18 are arranged at the iron wheels 17 so as to be respectively positioned at the outside parts of two railroad rails 16, 16 of a track 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a train, an electric locomotive,
The present invention relates to wheel devices for railcars and other railway vehicles running on railway rails.

[0002]

2. Description of the Related Art A railroad vehicle travels by rotating an iron wheel on a rail, and the wheel protrudes along an outer peripheral edge of a side surface of the iron wheel in order to prevent derailment during traveling. An annular flange for prevention is provided.

As shown in FIG. 1, a conventional wheel device for a railway vehicle has wheels 4 and 5 at both ends of an axle 3 rotatably supported by a bearing 2 at a lower portion of a vehicle body 1 of a railway vehicle A. The wheels 4, 5 are mounted on a shaft, and the wheels 4, 5 rotate on rails 6, 6, and an annular flange 8 for preventing derailment protruding along the outer peripheral edge of the side surface of the iron wheel 7. , 8 are provided. The two flanges 8, 8 are arranged on the iron wheel so as to be located inside the two rails 6, 6 of the track 9, respectively. Although a bogie, a shock absorber, and the like are provided at a lower portion of the vehicle body 1, they are omitted to simplify the description.

[0004] The conventional wheel device has the following problems. That is, as shown in FIG. 5, a lateral force is applied to the vehicle A by wind pressure or the like when traveling, turning (curving), or passing an oncoming vehicle. For example, when turning, a force F ₁ (centrifugal force) in a direction (outward direction) opposite to the turning direction (arrow B) is applied. Wherein in the outer direction of the force F ₁ is weak state, the frictional force F _2, F ₃ acting between the upper surface of the iron ring 7 and the rail 6 of the wheels 4 and 5 are balanced with the outward force F _1, When the force _{F 1} becomes stronger, both wheels 4, 5
Skidding on the rail 6 in the direction of the force F _1.

[0005] Since the height of the action point _S 2, _{S 3} of the frictional force and action point _{S 1} in the outer direction of the force _{F 1 F} 2, _{F 3} are different, the rotational moment M is generated. The generation of the rotational moment M, the outer wheels 5 of the turning force P ₁ increases to push down the six surfaces rail, the inner wheel 4 of the turning force P ₂ reduces to press the six faces rails below. If the rotational moment is too large, the wheel 4 inside the turn will lift. Incidentally, the maximum values of the frictional forces F ₂ and F ₃ are the frictional coefficients of the wheels 4 and 5 and the forces P ₁ and P ₂ pushing the rail 6 down.
Is determined by the product of Therefore, the frictional force F _2, F ₃ and the surface friction coefficient smooth (upper surface of the rail 6 smoothness) is small, such as iron ring 7 of the wheel does not become too large. for that reason,
A large outer force F ₁ is applied, the wheel (and therefore, the vehicle) is skidding in the direction of the force F _1, is while the side slip, the rotation moment M does not increase much, the inner wheel 4 It does not rise.

However, the wheels 4 and 5 are provided with flanges 8 to prevent derailment. In the conventional wheel device, the flanges 8 are arranged so as to be located inside the rails 6 and 6 of the track 9, respectively. It is. Therefore, when the wheel 4,5 is skidding on the rails 6 in the direction of the force F _1, as shown in FIG. 5 and FIG. 3b, the flange 8 of the outer wheel 5 is more in contact with the side surface of the rail 6 Lateral movement is restricted, and the brake is applied by contact friction with the rail 6. Therefore, the frictional force on the wheel 5 side increases, and conversely, the movement in the direction on the wheel 4 side is free. As a result, there is a problem that the turning moment M is increased, especially when the vehicle travels on a curve at high speed, and the inside vehicle 4 is lifted up as shown in FIG.

[0007]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention is directed to a railway vehicle capable of preventing wheels from being lifted during traveling even at a high speed turning, thereby contributing to prevention of derailment accidents or overturning accidents. It is an object to provide a wheel device.

[0008]

In order to achieve the above object, the present invention provides an iron ring rotating on a railroad rail and an annular flange for preventing derailment protruding along an outer peripheral edge of a side portion of the iron wheel. In a wheel device of a railway vehicle which is mounted on both ends of an axle at a lower part of a vehicle body of a railway vehicle and rotates on the rail to travel the vehicle body, the flange has two rails of a track. Are arranged on the iron ring so as to be positioned on the outer side of the iron ring.

According to the invention, the flanges of the wheels are located on the outer sides of the two rails, respectively.
Since the wheels are laid sideways when turning, the flanges of the inner (turning side) wheels abut against the side surfaces of the rails, and the brakes are applied by contact friction with the rails. For this reason, the frictional force on the inner wheel side increases and the force of pushing downward increases, and the outer wheel side does not increase the frictional force because the lateral movement is free. Therefore, since the rotational moment does not increase, the lifting of the inner wheel is suppressed. Thus, according to the present invention, a derailment accident or a fall accident during turning can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an outline of an embodiment of a wheel device for a railway vehicle according to the present invention, FIG. 2 is an explanatory diagram of an operation of the above wheel device, and FIG. 3 compares operations of the above wheel device and a conventional wheel device. It is an explanatory view shown for explaining.

In FIG. 1 to FIG. 3, a wheel device for a railway vehicle according to this embodiment is provided at both ends of an axle 13 rotatably supported by a bearing 12 below a vehicle body 11 of a railway vehicle a. Wheels 14 and 15 are mounted on the shaft.

The wheels 14, 15 are connected to railroad rails 16, 1
The steel wheel 17 rotates on the upper surface 6 and annular flanges 18, 18 for preventing derailment protruding along the outer peripheral edge of the side surface of the steel wheel 17. The two flanges 18 are arranged on the iron wheel 17 so as to be located outside the two rails 16, 16 of the line 19. In the figure, reference numeral 20 denotes a road surface.

Although a bogie, a shock absorber, and the like are provided at a lower portion of the vehicle body 11, they are omitted for simplification of description. Further, ballasts, sleepers and the like provided on the road surface 20 are omitted for the same reason as described above.

The wheel device for a railway vehicle according to this embodiment is constructed as described above. Next, the operation and the like will be described with reference to FIGS. In the conventional wheel device, the same operations as those described with reference to FIG. 5 are denoted by the same reference numerals, and the description thereof will be omitted.

The flanges 18, 18 of the wheels 14, 15
Are disposed on the iron wheels 17 so as to be positioned on the outer sides of the rails 16, respectively. Therefore, when turning leftward as shown by an arrow B in FIG.
When the wheels 4 and 15 slide in the direction of the force F ₁ , the flange 18 of the inner (turning side) wheel 14 comes into contact with the outer surface of the rail 16 and the brake is applied. Therefore, the inner wheel 1
4 side of the friction force becomes stronger force P ₂ to push downward to increase,
Since the outer wheels 15 are free to move in the lateral direction, the frictional force does not increase. For this reason, since the rotational moment M does not increase, the lifting of the inner wheel 14 is suppressed. As described above, since the lifting of the wheels during turning is suppressed, a derailment accident or a fall accident of the vehicle is prevented.

[0016]

According to the present invention, even when the vehicle is turning at a high speed, it is possible to prevent the wheels from being lifted during the traveling, so that it is possible to prevent a fall accident without derailment of the vehicle.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an outline of an embodiment of a wheel device for a railway vehicle of the present invention.

FIG. 2 is an explanatory diagram of an operation of the wheel device.

FIG. 3 is an explanatory view for comparing and explaining the operation of the same wheel device and a conventional wheel device.

FIG. 4 is an explanatory view showing a wheel device of a conventional railway vehicle.

FIG. 5 is an operation explanatory view of the wheel device of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Body 13 ... Axle 16 ... Railway rail 17 ... Iron wheel 18 ... Annular flange for derailment prevention 19 ... Track a ... Railway car

Claims (1)

[Claims] 1. An iron wheel that rotates on a railroad rail, and an annular flange for preventing derailment protruding along an outer peripheral edge of a side surface of the iron wheel, and is provided at both ends of an axle under a vehicle body of a railroad vehicle. In a wheel device of a railway vehicle provided to be mounted on a shaft and rotating the rail to run the vehicle body, the flange is disposed on the iron wheel such that the flange is located outside each of the two railway rails of the track. A wheel device for a railway vehicle.