JPH0580805U - Elastic wheels for railway vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the installation of brake discs on elastic wheels with disc brakes. [Structure] In an elastic wheel 1 in which an elastic body 3 is sealed to a rim portion 2 of a wheel, a plurality of pin holes are provided in a plate portion 5 connecting the rim portion 2 and a boss portion 4, and a heat insulating material is provided in each pin hole. The load-supporting pin 7 wound with 6 is inserted. The inner peripheral portions of the brake discs 8 and 9 opposed to the pin ends on both sides of the load support pin are attached to the boss portion 4 of the wheel, and the brake discs 8 and 9 are respectively attached.
This is an elastic wheel for a railway vehicle in which brake pressing devices 10 and 11 are provided opposite to each other, and the pressing force to the brake disc is received by the load support pin 7. [Effect] The structure of the conventional disk brake device for a railway vehicle is used as it is for the elastic wheel.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement in elastic wheels for railway vehicles equipped with disc brakes.

[0002]

[Prior Art]

 Wheels for railway vehicles are generally manufactured by casting or forging from steel as an integral wheel or an assembled wheel. This steel wheel has a low vibration damping property of steel itself, and the rolling noise becomes louder as the wheel rotates at a higher speed, which is a source of noise. In order to prevent this noise, there is an elastic wheel in which an elastic body is sealed on the wheel rim portion.

A brake device is required to stop a running railway vehicle, and a mechanical brake is generally used. This mechanical brake includes a unit brake that pushes the brake shoe 13 against the tread surface of the wheel 12 as shown in FIG. 2A, and both sides of a plate portion that connects the rim portion and the boss portion of the wheel 12 as shown in FIG. B. There is a disk brake 14 provided in the former, the former is used for low speed vehicles and the latter is used for high speed vehicles. When the brakes are activated to stop the vehicle, the huge kinetic energy of the vehicle is converted into heat energy, which may cause the wheel tread and the brake disc to reach a high temperature of several hundred degrees. Therefore, when a disc brake is used for the elastic wheel 15 having an elastic body relatively weak against heat, the brake disc 16 is extended outward and the disc brake 17 is installed as shown in FIG. To do so.

[0004]

[Problems to be solved by the device]

 As described above, when the disc brake is attached to the elastic wheel, it is necessary to extend the disc brake to the outside in order to avoid the influence of heat. Therefore, the installation space for the bogie structure will increase, and it will be necessary to devise ways to keep the bogie within the vehicle limits. In addition, there were drawbacks such as an increase in the weight of the bogie and the necessity of increasing the diameter of the axle to ensure the safety of the axle.

The present invention provides an elastic wheel having a reduced axial dimension, excluding the drawbacks of the conventional elastic wheel with a disc brake.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an elastic wheel in which an elastic body is sealed to a rim portion of a wheel, and a plurality of pin holes are provided in a plate portion connecting the rim portion and the boss portion, and each pin hole is provided in each pin hole. A load support pin wound with a heat insulating material is inserted and fitted, the inner peripheral portion of the brake disc facing both pin ends of the load support pin is attached to the boss portion of the wheel, and a brake pressing device is attached to each of the brake discs. Is an elastic wheel for a railroad vehicle, which is configured so that the load supporting pin receives the pressing force to the brake disc.

[0007]

[Action]

 Since the pressing force applied to the left and right brake discs during braking is received by the load support pins wrapped with the heat insulating material, the pressing force on the brake discs during braking works sufficiently and the braking effect is obtained efficiently. Also, even if the brake disc becomes hot due to the braking operation, heat is not transmitted to the wheel rim side because it is blocked by the heat insulating material of the load support pins, preventing the deterioration of the elastic body due to the high temperature of the wheel rim part. To be done. In addition, it is possible to avoid changing the size of the truck and increasing the weight by reducing the axial dimension of the wheel.

[0008]

【Example】

 An embodiment of this invention will be described with reference to FIG. In the elastic wheel 1 in which the elastic body 3 is sealed to the rim portion 2, a plurality of pin holes are circumferentially arranged in the plate portion 5 connecting the rim portion 2 and the boss portion 4, and the heat insulating material 6 is fitted. Insert the load support pins 7 into the pin holes. Then, the inner peripheral portions of the brake discs 8 and 9 facing the both ends of the load support pin 7 are attached to the boss portion 4 of the wheel, and the brake discs 8 and 9 are provided with the brake pressing devices 10 and 11 opposite to each other. .. When the brake pressing devices 10 and 11 are pressed against the brake disc during braking, the back surface of the disk contacts the load support pin 7, and the pressing force is effectively used as the braking force. The amount of heat accumulated in the disc due to the braking operation is blocked by the heat insulating material 6 of the load support pin 7 and is not transmitted to the wheel rim side, and the elastic body 3 is deteriorated due to high temperature. Absent.

[0009]

[Effect of the device]

 According to the present invention, the configuration of the commonly used railway vehicle disc brake device can be used as it is for the elastic wheels, and the rolling noise of the wheels in a high-speed vehicle can be reduced and the noise can be suppressed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an upper half of an elastic wheel for a railway vehicle according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a conventional brake device for a wheel for a railway vehicle, FIG. A shows a tread brake for an integrated wheel, FIG. B shows an integrated wheel disc brake, and FIG. C shows an elastic wheel disc brake.

[Explanation of reference numerals] 1 elastic wheel 2 rim portion 3 elastic body 4 boss portion 5 plate portion 6 heat insulating material 7 load support pin 8 brake disc 9 brake disc 10 brake pressing device 11 brake pressing device 12 wheel 13 brake shoe 14 disc brake 15 Elastic wheel 16 brake disc

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Name of device

[Correction method] Change

[Correction content]

[Name of invented elastic wheels for railway cars both

[Procedure Amendment 2]

[Document name to be amended] Statement

[Item name to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

Claims (1)

[Scope of utility model registration request] 1. In an elastic wheel in which an elastic body is sealed to a rim portion of a wheel, a plurality of pin holes are arranged in a plate portion connecting the rim portion and the boss portion, and a heat insulating material is wound around each pin hole. The load supporting pin is inserted and fitted, the inner peripheral portion of the brake disc facing both end pins of the load supporting pin is attached to the boss portion of the wheel, and a brake pressing device is provided opposite to each of the brake discs,
Elastic wheels for railway vehicles configured so that the load support pins receive the pressing force on the brake discs.