JPS6157227B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a running bogie for a track vehicle that runs on a track, and particularly to a running bogie for a track vehicle that is suitable for running on a track having curved rails.

Conventionally, the steering wheels of a track vehicle that has a guide rail laid between two running rails and is steered by this guide rail are guide wheels 19 and 20A that roll on a guide rail 23 as shown in FIG. , 20B and others.
It relied on double-flange wheels 21 as shown in FIG. The former requires a gap G' with the floor F on both sides of the guide rail 23, and when other road vehicles such as trucks cross the road, the wheels of the truck fall into this gap G' and cannot cross, and the latter requires a gap G' on both sides of the guide rail 23. The difference in turning radius between the inside and outside causes slippage on the wheel tread f.
Not only did it increase running resistance, but it also suffered from severe wear, making it impractical.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide a running bogie for a track vehicle that can easily run on a guide rail having a curved section and that has less wear on its wheels and is easy to steer.

The present invention includes two sets of bogie frames in which wheels running on two running rails are pivotally supported so as to rotate independently,
a front bogie frame that is pivotally supported at the ends of the two sets of bogie frames in the running direction and that pivots on steering wheels that run on one guide rail laid between the two running rails;
In the running bogie for a track vehicle, the running bogie includes a car body frame arranged astride the two sets of bogie frames and pivotally supported substantially on the axis of wheels that are pivoted on the bogie frames when viewed in plan, wherein the front bogie The frame is pivotally supported on the bogie frame via a vertical shaft, and the steering wheels are composed of two sets of steering wheels pivotally supported in front and rear in the traveling direction about the vertical shaft, and the two sets The steering wheel is composed of two wheels that are supported on a shaft so that they can roll independently, and are arranged oppositely so as to sandwich the guide rail.

Hereinafter, the present invention will be explained with reference to embodiments shown in FIGS. 1 to 3.

Vehicle body frame 1 for a track vehicle using the bogie of the present invention
The two sets of bogie frames 2 are connected by a swing bearing 4.

The outer ring of the swing bearing 4 is fixed to the vehicle body underframe 1, and the inner ring is fixed to the bogie frame 2, respectively, so that the two sets of bogie frames 2 can be easily rotated with respect to the vehicle body underframe 1.

As shown in FIG. 2, bearing built-in wheels 5A and 5B are supported on the truck frame 2 by axles 6A and 6B. The main axles 6A and 6B are fixed to the bogie frame 2. The wheels 5A, 5B can each rotate independently and roll on the rails 22A, 22B. The axle 6A,
The center of the swing bearing 4 is located on the axis 6B when viewed in plan.

A flat bearing 1 is mounted at one end of the bogie frame 2 at a distance.
7 is fitted, and a shaft 16 integral with the front bogie frame 3 is fitted vertically into this flat bearing 17 for easy rotation.

As shown in FIG. 3, on the front bogie frame 3, two sets of steering wheels are pivotally supported in the front and rear of the traveling direction about the vertical shaft 16, and each of the two sets of steering wheels is Constituent wheels 7A, 7B and 7A',
7B' are pivotally supported by the axle 11 via bearings 8A and 8B, respectively, and roll oppositely across the guide rail 23. The inner rings of the bearings 8A, 8B are fixed by spacing metals 14A, 14B, 15 fitted into the axle 11 at appropriate intervals.

Further, the axle 11 is fixed to the front bogie frame 3 by an axle retainer 12 and bolts 13.

The outer rings of the bearings 8A, 8B are attached to the bearing retainer lids 9A, 9.
Wheels 7A, 7 by B and bolts 10A, 10B
B, 7A', 7B', and the wheel 7A
and 7B, and 7A' and 7B' can each rotate independently while maintaining an appropriate gap g.

When a truck with the above configuration is running, each wheel 7
A, 7B, 7A', and 7B' rotate and travel independently. Further, the front bogie frame 3 is in charge of steering the bogie frame 2, so that the vehicle can run stably in both straight lines and curves. It is particularly effective on curved sections.

That is, in the curved portion, as shown in FIG.
The guide rail 23 is displaced by a displacement distance ΔR toward the outer running rail 22A so that the axes of A and 5B always coincide with the center O of the radius of curvature. The guide rail 23
The vehicle travels along the road while steering the bogie frame 2.

Wheels 7A, 7B, 7A', 7 of front bogie frame 3
B' is a flange surface K that is subject to lateral pressure because it rolls independently even if there is a difference in the radius of curvature due to the width dimension of the guide rail 23, so there is little slippage, it is easy to rotate along the curvature, and it is subject to lateral pressure (Fig. 3). Less wear.

Therefore, the wheels 7 of the bogie frame 3 ahead of the wheels 5A and 5B
A, 7B, 7A', 7B' have little slippage and wear, and not only can they easily travel on curved tracks with a small radius of curvature, but also the gap G between the floor F and the guide rail 23 can be made small, making it easy for road vehicles to cross. There is an effect that can be achieved.

Note that the displacement distance ΔR is derived from ΔR=(+R) ^1/2 −R. Here, is the distance between the wheels 5A, 5B and the axis of the shaft 16, and R is the distance from the center of the radius of curvature to the guide rail 23.

By the way, if one set of operating wheels is used instead of the two sets of steering wheels provided on the front bogie frame 3 (first
In Figure 2, 7A, 7B or 7A', 7
B′) is the vertical axis 16
Since the front bogie frame 3 attempts to rotate around the center, the direction in which the guide rail 23 extends and the direction in which the wheels travel do not match, and the frictional resistance between them increases, leading to a risk of derailment. Therefore, if the front bogie frame 3 is fixed so that it does not move relative to the bogie frame 2, the rotation of the front bogie frame 3 will be eliminated and the running will be stable on a straight section. A large difference occurs between the rails and the direction in which the rails extend, and as a result, the frictional resistance between the two increases, which may lead to derailment. For this reason, it is necessary to provide two sets of steering wheels, front and rear in the direction of travel with the vertical axis 16 as the center, so that there is no large difference in direction between them and the guide rail 23. Two wheels 7A, 7 facing the two sets of steering wheels
B, 7A', and 7B'.

As explained above, the front bogie frame of the present invention can easily run on curved sections with low running resistance.
There is also less wear on the wheels.

Furthermore, since the opening area of the rail installation portion on the floor can be made small, road vehicles such as automobiles can travel across the rail as well as in the longitudinal direction of the rail.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a running bogie for a track vehicle according to the present invention, FIG. 2 is a plan view taken along the line A--A in FIG. 1, and FIG. FIG. 4 is a schematic diagram of the cart shown in FIG. 1 when it is traveling along a curved section, and FIGS. 5 and 6 are front views showing an example of a conventional steering section, respectively. 1... Vehicle body underframe, 2... Bogie frame, 3... Front bogie frame, 5
A, 5B...wheels, 7A, 7B, 7A', 7B'...wheels, 22A, 22B...travel rails, 23...guide rails.

Claims (1)

[Claims] 1. Two sets of bogie frames in which wheels running on two running rails are pivotally supported so as to rotate independently, and two sets of bogie frames are respectively pivoted on the ends of the two sets of bogie frames in the running direction, and the wheels running on the two running rails are respectively supported in the running direction. A front bogie frame that pivotally supports a steering wheel that runs on a single guide rail laid between them, and a wheel that is placed astride the two sets of bogie frames and is pivoted by the bogie frame when viewed from above. In a running bogie for a track vehicle, the front bogie frame is pivotally supported on the bogie frame via a vertical shaft, and the steering wheel is pivoted on the vertical axis. Consisting of two sets of steering wheels that are pivotally supported at the front and rear in the running direction, and each of the two sets of steering wheels are pivotally supported so that they roll independently, and are arranged opposite to each other so as to sandwich the guide rail. A traveling bogie for a track vehicle, characterized in that it is constructed of two wheels.