JPH0373512B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a running device for a track vehicle that runs on a track, and particularly relates to a running device for a track vehicle that can easily pass when running on a track having a curved track. .

[Conventional technology]

Traditionally, the running system for rail vehicles has been the same as that of ordinary vehicles, in which wheels of the same diameter are press-fitted onto the axle of the vehicle and are press-fitted onto a pair of rails, and a pair of wheels that run on a pair of rails to facilitate passage through curves. A system in which a guide rail is provided between the rails of the vehicle, and a guide wheel that moves on this guide rail is supported in front or behind the wheel so that it can rotate independently on the left and right sides through the axle of the vehicle. has been adopted.

[Problem that the invention seeks to solve]

However, in the former method in which wheels with the same diameter on the left and right are press-fitted onto the axle, the travel distance of the inner and outer tracks changes when passing through a curve.
Therefore, the wheels on the inner track side will roll with a lot of slipping. The minimum curve radius of such a curved road is generally more than 10 times the distance between the axles of the vehicle, even for small vehicles, and as this curve radius becomes smaller, wheel slips and sideslips occur more often, and wheels and The drawback was that the rails began to wear more and more.

In addition, in the latter type of guide rail system, in which the left and right wheels can rotate independently using guide rails and guide wheels, slipping of the left and right wheels is avoided even on curved roads with small curve radii. This is less likely to occur and a much better transfer condition can be obtained compared to the former method, but since the guide rail is used, the structure of the point is complicated and it is not easy to install, and the point is not easy to install. The drawback was that the range of application was narrow because the rails could not be used as they were.

The present invention eliminates the drawbacks of the conventional devices, and allows the vehicle to easily run on curved sections with small curvature without using guide rails, even when carrying a heavy load of several tens of tons, and with less resistance. It is an object of the present invention to provide a running device for a track vehicle in which wheel wear is significantly reduced.

[Means for solving problems]

In order to solve the above problems, in the present invention, the two bogie frames are rotatably supported on the car body frame using front and rear swivel bearings, and the front and rear running wheels are independently rotatable on the left and right sides of the bogie frame. A steering truck equipped with four steering wheels that are supported on the shaft and can rotate independently on the left and right sides is provided, and the front and rear truck frames are held and engaged through guide pins at the front and rear of the truck frame of the steering truck, respectively. It is characterized by this.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the drawings.

The body underframe 1 and the bogie frames 2, 2 of the track vehicle according to the present invention are connected by front and rear swing bearings 3, 3, the outer rings of the swing bearings 3, 3 are connected to the car body frame 1, and the inner rings are connected to the bogie frame 2. The bogie frame 2 can be easily rotated with respect to the vehicle body frame 1.

As shown in FIG.
The wheels 4a, 4b are rotatably supported independently by the wheels 5b, and the wheels 4a, 4b roll on the rails 20a, 20b.

Steering bogie frame 6 arranged between bogie frames 2, 2
As shown in FIG. 2, four steering wheels 7a, 7a, 7b, 7b with built-in bearings are rotatable independently on axles 8a, 8a, 8b, 8b fixed to a steering bogie frame 6. The wheels 7a, 7 are pivotally supported.
a, 7b, 7b are adapted to roll on rails 20a, 20b.

Guide pins 9 are fitted into both ends of the steering bogie frame 6 at positions that overhang the center distance l of the steering wheels at a distance a, and these pins 9 are inserted inward from the bogie frame 2, respectively. Long hole 1 corresponding to the deviation between the bogies when the extended steering frame passes through a curve
It is inserted at 0. In addition, in order to determine the dimension in the longitudinal direction with respect to the vehicle body underframe 1, a pin 11 is fitted in the lower center of the vehicle body underframe. 12 to guide the deflection of the steering truck frame 6 in the left-right direction.

Therefore, when traveling with the device configured as described above, each wheel 4a, 4b, 7a, 7b rotates and travels independently, and the steering bogie frame 6 is responsible for steering the bogie frame 2. This allows stable driving in both straight lines and curves.

That is, in the curved portion of the track, as shown in FIG. , the pin hole of the steering frame of the bogie frame 2 may be displaced by a distance ΔR toward the outer traveling rail 20a. This determines the position of the guide pin 9 fitted into the steering bogie frame 6.
Distance l between steering axles 8a, 8a, 8b, 8b
can be obtained by choosing appropriately. This prevents the wheels 4a, 4b from slipping sideways, and allows the vehicle to travel on a curved section with a small radius of curvature with little wear on the wheels 4a, 4b.

Note that the steering wheels 7a and 7b are not provided with a mechanism that allows their axes to coincide with the center O in consideration of the stability and simplicity of the steering cart, but the distance between the axes l is sufficient to the extent that it does not interfere with steering. The effects of wear and the like can be minimized by making the steering cart small and light enough to not interfere with steering.

Figures 4 and 5 show a simpler version of the device described above, with the pins 9 at the two locations in Figures 1 and 2,
By combining the guide pin 9' and the pin hole 10' which can only rotate freely, the pin 11 and the elongated hole 12 of the embodiment shown in FIGS. 1 and 2 are combined. is omitted.

These are wheels 4a and 4b with built-in bearings for bearing the load.
There is a slight difference in the degree to which the axis of the front and back points toward the center O of the radius of the curve, but in most cases the structure is sufficient for practical use, except for cases where the radius of curvature is extremely small compared to the distance l between the axes. You can say that.

〔Effect of the invention〕

As described above, the track vehicle running device according to the present invention has two bogie frames rotatably supported on the car body frame by the front and rear swing bearings, and the front and rear running wheels rotate independently on the left and right sides on the bogie frame. A steering truck is provided with four steering wheels that are pivotably supported and can rotate independently on the left and right sides, and retainers are installed between the front and rear truck frames via guide pins at the front and rear of the truck frame of the steering truck, respectively. Because of the integrated structure, even when carrying a heavy load, the vehicle can easily run on curved sections with small curvature without using guide rails with little resistance, and wheel wear can be significantly reduced.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a cross-sectional view of Figure 1, Figure 3 is a schematic diagram of the traveling device in Figure 1 when traveling on a curved section, Figures 4 and 5.
The figures show other embodiments, and Figure 4 is a side view;
FIG. 5 is a cross-sectional view of FIG. 4. 1 is the vehicle body frame, 2 is the bogie frame, 3 is the swing bearing, 4
a, 4b are wheels with built-in bearings, 5a, 5b are axles, 6
is the steering truck frame, 6a, 6b are the axles, 7a, 7b
are steering wheels, 8a and 8b are axles, 9 and 11 are pins, and 10 and 12 are long holes.

Claims (1)

[Claims] 1 Two bogie frames are rotatably supported on the car body frame by front and rear swivel bearings, and the front and rear running wheels are pivoted on the bogie frame so that they can rotate independently on the left and right sides, and four wheels that can be rotated independently on the left and right sides. A running device for a track vehicle, characterized in that a steering bogie is provided with steering wheels, and the front and rear bogie frames are held and engaged through guide pins at the front and rear of the bogie frame of the steering bogie, respectively.