JPS6230953B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-shaft bogie having a fixed shaft that connects left and right wheels for a railway vehicle.

Examples according to the prior art are shown in FIGS. 1 and 2. FIG. 1 is a front view, and FIG. 2 is a plan view with the upper part of the pillow beam removed.

The two wheel axles 9 are supported in parallel to the bogie frame 6 by an axle spring 7, an axle box 8, and a supporting device (not shown). The vehicle body 1 is connected to a pillow beam 4 via an air spring 2.
It is placed on top of the vehicle, and its position in the front-rear direction is determined by the bolster anchor 3. The pillow beam 4 is placed on the lower center plate 10 of the bogie frame 6 by the upper center plate 5, and the relative rotation of the upper center plate 5 and the lower center plate 10 allows the bogie frame 6 as a whole to turn when passing through a curve. (The wheel is steered as the bogie frame 6 while maintaining the parallelism of the two pairs of wheel axles 9. Therefore, the ideal steering condition as shown in Figure 7a is not achieved.) Generally speaking In conventional bogies, the longitudinal support rigidity of the axle box is often set high from the viewpoint of high-speed running performance, and even when passing through a curve, the natural movement of the wheel axle as shown in Figure 7 is suppressed. Since it is a spring system, it has the disadvantage that the lateral pressure increases when passing through curves, resulting in increased wear on both the rail and wheels.

An object of the present invention is to provide a bogie that can easily pass through curves by taking advantage of the natural steering action caused by the diameter difference between the contact points of wheels and rails (see Figure 7) when passing through curves, thereby reducing lateral pressure. , to reduce wear on both wheels.

The main point of the present invention is that the bogie frame, which was conventionally integrated, can be replaced by two parts.
It is divided into parts and each can rotate independently around a central pin to achieve natural steering, and is characterized by low lateral pressure and little wear on both the rail and wheels.

An embodiment of the invention is shown in FIGS. 3 and 4. The vehicle body 1 is placed on a pillow beam 4 via an air spring 2, and the pillow beam 4 is positioned in the longitudinal direction by a bolster anchor 3, and although horizontal movement is allowed with respect to the vehicle body 1, longitudinal movement and vertical axis are limited. It is designed not to rotate around it. A center pin 13 protrudes from the center lower part of the pillow beam 4 through an upper center plate 11, and penetrates the front and rear divided truck frame 15 and truck frame 16, allowing them to rotate freely around the vertical axis with a nut 14. I support it.

Therefore, when passing through a curve, as shown in Figure 7b, the difference in diameter between the contact points between the wheels of the outer track and the inner track and the rail does not impede the movement of each wheel set along the curve. Since each wheel axle 9 steers at an optimal angle relative to the vehicle body 1, the flanges 23 do not come into contact with the rails 24, reducing lateral pressure and reducing wear on both the wheels and the rails. The vertical load applied from the pillow beam 4 is transferred to the bogie frame 15 through the upper center plate 11 and the center plate sliding plate 12.
16, and is further transmitted to the wheel set 9 via the shaft spring 7 and the shaft box 8. center pin 13
Vertical loads and longitudinal loads are transmitted between the bogie frames 15 and 16, and since the bogie frames 15 and 16 rotate independently around their vertical axes, the center pin bushing 17 is used to prevent wear and reduce sliding resistance. is provided.

5 and 6 show other embodiments of the invention. This embodiment applies the present invention to an electric trolley, and the basic configuration and principle are the same as the previously described embodiment. A drive device 25 is connected to the wheel axle 9, and a drive device 2 is connected to the bogie frame 19, 20 via a flexible joint 26.
Motors 27 connected to the motors 5 and 5 are respectively attached. In order to improve running stability at high speeds, an oil damper 21 and a spring 22 are installed between the bogie frames 19 and 20 to provide appropriate damping and elasticity to the rotation of the bogie frames 19 and 20 around the center pin (vertical axis).
It is provided on both the left and right sides between the

The oil damper 21 is designed to prevent low-frequency vibrations so as not to impede the long-cycle relative rotations of the bogie frames 19 and 20 as they pass through a curve, but to suppress the short-cycle relative rotations caused by the left-right vibrations of the vehicle body while traveling in a straight line. It is designed to provide a small damping force against motion and a large damping force against high-frequency vibrations.

Application of the present invention has the following effects.

(1) Since the natural steering action of the wheel axle is not suppressed, lateral pressure is reduced and wear on both wheels and rails is reduced.

(2) As a result, replacement cycles and maintenance intervals can be extended, making maintenance easier.

(3) Conventional methods can be used as is for the axle spring and axle box support device, and the structure is simple and highly reliable.

(4) It can be easily applied to electric trolleys, and the conventional motor drive system can be used as is.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of the prior art, Fig. 2 is a plan view of the same without the pillow beam, Fig. 3 is a front view showing an embodiment of the present invention, and Fig. 4 is a plan view of Fig. 3. 5 is a front view showing another embodiment of the present invention,
FIG. 6 is a plan view of FIG. 5, and FIG. 7 is an explanatory diagram showing the movement of the wheel set on a curve. 1... Vehicle body, 2... Air spring, 3... Bolster anchor, 4... Pillow beam, 7... Axle spring, 8... Axle box, 9... Wheel axle, 11... Center plate, 12... Center plate sliding plate, 13... Center pin, 14... Nut, 1
5, 16, 19, 20... Bogie frame, 17... Center pin bushing, 21... Oil damper, 22...
Spring, 23...Flange, 24...Rail, 25
... Drive device, 26 ... Flexible joint, 27 ... Motor.

Claims (1)

[Scope of Claims] 1. A two-axle bogie for a railway vehicle, which has a bogie frame divided into two parts at the front and rear, each bogie frame has one wheel shaft positioned by an axle box support device, and the bogie frame has the above-mentioned structure. 1 extending vertically at the midpoint of the wheel axle
A two-shaft bogie for a railway vehicle, characterized in that the two-axle bogie for a railway vehicle is rotatably connected by a main pin, and configured such that the bogie frame can bear the vertical load applied from the car body via the pin. 2 In claim 1, there is provided a second railway vehicle for use in a railway vehicle, which is provided with a spring device for imparting elasticity to the relative rotation of a bogie frame divided into two parts, and a damping force applying device for imparting a damping force to the rotation. Axle truck.