JPH03281402A - Wheel device for railway vehicle - Google Patents

Abstract

PURPOSE:To stabilize high speed running in a straight section and to effectively utilize a road gradient in a curved section by providing a friction clutch and its operating body on a motion transmitting course between a right and a left wheel, and engaging friction clutches to unitedly rotate both the wheels. CONSTITUTION:At the beginning of running in a curved section, friction clutches 12, 14 provided on a wheel shaft 2 on the front side in an advancing direction of the two wheel shafts 2 of a truck are mutually engaged to unitedly rotate a right and a left wheel 7a 7b. Thus both the wheels 7a, 7b function for steering, and friction clutches provided on a back wheel shaft are released to make back wheels follow the wheels 7a, 7b for smoothing the running of a car in a curved section. This formation makes the high speed running of the vehicle in a straight section and the effective utilization of a gradient in the curved section possible.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a wheel system for a railway vehicle, and more particularly to a wheel system for a railway vehicle having individually rotatably mounted wheels.

BACKGROUND OF THE INVENTION Conventionally, in order to prevent wheels from falling off tracks, wheels for railway vehicles have been provided with flanges at the inner end of the tread surface of the wheel that abut against the inner surface of the track. It is formed with a slope so that the wheel radius decreases.

The effect of the slope of this tread is that if for some reason the wheel device is biased to one side of the track, a restoring force is generated to return it to the opposite side, automatically returning the wheel device to the center of the track. be. In addition, when a vehicle runs on a curved section and the wheel device is pulled toward the outer track by centrifugal force, the diameter of the outer wheel becomes larger than the diameter l of the inner wheel due to the slope of the tread. The peripheral speed of the outer wheel is large,
The outside travels faster than the inside, allowing the vehicle to travel smoothly on curved sections.

The effect of the slope of the wheel tread also causes extreme meandering motion in the wheel device when the vehicle is running at high speed on a straight section, making it difficult for the vehicle to run stably. Wheel devices with attached wheels have already been proposed.

Problems to be Solved by the Invention Already proposed wheel systems having individually rotatable wheels have been found to cause meandering motion of the vehicle when traveling at high speeds on straight sections. Although it is extremely effective for stable running, since the five wheels rotate independently, it is not possible to effectively utilize the effect of the slope of the tread when driving on a curved section. A wheel device like this is pulled toward the outer track by centrifugal force and continues to move straight.
．． This creates a large frictional force between the flange surface of the wheel and the side surface of the track that it comes into contact with, causing wear on the flange surface of the wheel and the side surface of the track, making it difficult to run smoothly around curves. There was a big problem.

This invention was made to solve these problems, and provides a road vehicle that is stable when traveling at high speeds on straight sections and can effectively utilize the effect of the slope of the tread when traveling on curved sections. The objective is to provide a wheel device.

Means for Solving the Problems In order to achieve the above objects, f) the invention provides a wheel device for a railway vehicle having wheels rotatably mounted individually, which includes an air vibration clutch in a motion transmission path between the wheels. , and an operating body for this friction clutch, and the operation C of this operating body causes the above-mentioned el! When the scraper clutch is engaged, both axles rotate together.

Note that it is desirable to use a piston whose drive source is pressurized fluid as the operating body of this medium friction clutch.

When the vehicle approaches a curved section, when the friction clutch installed on the front wheel axle in the direction of vehicle movement is engaged, both axles rotate together and the treads of both axles are engaged. By steering the vehicle through the action of 2, releasing the friction clutch provided on the rear wheel axle, and causing the rear wheels to follow, the vehicle is able to travel smoothly on curved sections.

Note that when compressed air is used as the pressure fluid used to operate the operating body, a piping system for braking, etc. can be used, which is advantageous in terms of manufacturing.

EXAMPLE 5 Hereinafter, an example of the present invention will be described with reference to a wheel device for a railway vehicle shown in the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

In Figures 1 and 2, 1 is a case and arms 3, 3
This is a part that is fixed to a cross beam (not shown) that is elastically and pivotably attached to the truck. wheel 7a,
A support cylindrical shaft 4.4 supporting the arm 7b passes through the arms 3, 3 and is fixed to the case 1. This support cylinder 4.4 is
The cars 1) & 2 are supported within the cylindrical holes 4a, 4a, and the wheels 7a are fixed on the outer periphery. The integrated cylindrical portion 8a and the cylindrical portion 8b fixedly integrated with the wheel 7b are connected to the roller bearing 5.
It is rotatably supported via 7 and 6.

A clutch hub 10 is splined to one end 2a (right end 4 in the figure) of the g-shaft 2, and a circular small diameter portion 9 integrally formed with a cylindrical portion 81) is splined to the other end 21). combined. Therefore, the axle 2 is connected to the wheel 7b and -
- It is a body and rotates together with the wheel 7b.

A plurality of inner clutch plates 12 are fitted into the splines 11 on the outer circumference of the clutch hub 10, and a plurality of outer clutch plates 14 are fitted into the splines 13 on the inner circumference of the cylindrical portion 8a so as to be slidable in the axial direction. Note that the inner clutch plates 12 and the outer clutch plates 1, 1, and 1 are alternately arranged.

A lid-shaped end cover 15 is fixed to the end of the cylindrical portion 8a. This end cover 15 has an inner cylindrical portion], 5
b and the central hole 15a form a cylinder 2, which slidably accommodates a piston 16.

Note that ]7 is a return spring with bits>16.

Therefore, a friction clutch is constituted by the slidable inner clutch plate 12 and the outer clutch plate 14, and the slidable screw 16 presses these clutch plates to bring the friction clutch into an engaged state. It is something. That is, the piston 16 serves as an operating body of the friction clutch.

On the outside of the end cover 15, there is a tip opening 19 of one sliding joint that surrounds the central hole 15a and is covered with a cover unit 18.
A distal end 21 of a tube 22 connected to a compressed air source (not shown) is supported via a ball bearing 20.

Now, when pressurized air from the compressed air source enters the cylinder formed in the end cover 15 through the tube 22, its tip 21, and the central hole 15a, the piston 16 moves against the return spring 17 and the shaft The outer clutch plate 14 and the inner clutch can be slid in any direction! Press and engage 12 (
(See Figure 2).

Therefore, the wheel 7a engages with the axle 2 and rotates together with the wheel 7b.

Effects of the Invention According to the present invention, in a wheel device for a railway vehicle having wheels rotatably mounted individually, a friction clutch and its operating body are provided in a motion transmission path between the wheels.
In straight sections, the friction clutch can be released to maintain stability during high-speed running, and in curved sections, the friction clutch can be engaged to achieve smooth curved running, eliminating the need for wheels and tracks. It is possible to prevent serious wear and tear, and the riding comfort is also improved.

In addition, if the operating body is a piston operated by compressed air, braking system piping etc. can be used.
Easy to manufacture and manage.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional plan view of a wheel device for a railway vehicle showing an embodiment of the present invention, and FIG. 2 is a plan view similar to FIG. 1 in which a friction clutch is in an engaged state. 1...Case, 2...Axle, 3...Arm, 4...
・Support cylinder, 4a... Cylindrical hole, 5, 6... Roller bearing, 7a7b... Wheel, 8a, 8b... Cylindrical part, 10
Clutch hub, 11.13...Spline, 12.
・Inner clutch plate, 14...Outer clutch plate, 15・
・End cover, 16...Piston (operating body), 17
...Return spring, 9.Sliding joint, ...Tip, 22.Tues.

Claims (2)

[Claims] (1) In a wheel device for a railway vehicle having wheels rotatably mounted individually, a friction clutch and an operating body for the friction clutch are provided in a motion transmission path between the wheels, and the operation of the operating body causes the A wheel device for a railway vehicle, characterized in that both wheels rotate together when a friction clutch is engaged. (2) The wheel device for a railway vehicle according to claim (1), wherein the operating body is a piston operated by pressure fluid.