JPS6116666B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air spring height adjustment device for a bolsterless type bogie for a railway vehicle in which an air spring is used as a pillow spring and a car body is directly supported on the bogie via the air spring.

An example according to the prior art will be explained with reference to FIGS. 1 and 3. FIG. 1 is a side view of a conventional pillow-barrier type truck, and FIG. 3 is a conventional height adjustment device provided on the truck of FIG. 1. In the figure, the bogie frame 3 is rotatable in a horizontal plane relative to the sleeper 4, and the sleeper 4 is connected to the car body 1 by a bolster anchor 6.
It is restrained from rotating or moving back and forth in the horizontal plane. An air spring 7 is provided between the pillow beam 4 and the vehicle body 1, and exerts a spring action in the vertical and horizontal directions. A height adjustment device 8 is installed to maintain the position of the vehicle body 1 at the same height even if the load on the vehicle body 1 changes, and detects the height of the air spring 7 and controls the supply and discharge of air in the air spring. It is configured to be carried out. The height adjustment device 8 is configured to detect the height of the air spring 7 by connecting an arm 12 extending from a height adjustment valve 11 attached to the pillow beam 4 and a mounting bracket 19 attached to the vehicle body with a rod 17. . The structure is such that the relative displacement of the pillow 4 and the vehicle body 1 in the longitudinal and lateral directions (approx. The change in is slight and does not pose a problem.

Next, as shown in Fig. 2, in a bolsterless type bogie structure in which the car body 1 and the bogie frame 3 are directly connected using an air spring 7 capable of large longitudinal movement, the height adjustment device is shown in the figure. It is necessary to detect the dimension H and adjust the height of the air spring. However, the movement of the car body 1 and bogie frame 3 in the longitudinal and lateral directions near the air springs is ±100 mm or more and ±40 mm, respectively.
mm, and with the conventional height adjustment device described above, the rod 17 will tilt significantly due to the relative rotation between the bogie and the car body 1 when passing through a curve, and this will cause not only changes in the car body load but also There was a risk that the height adjustment valve 11 would operate to supply and exhaust the air in the air spring, causing the vehicle body 1 to move up and down unnecessarily, impairing ride comfort.

In view of the above points, an object of the present invention is to provide an air spring height adjustment device that can be applied to a bolsterless type truck and does not impair riding comfort.

The present invention provides a link rotatable on a horizontal plane around the approximate center of cart rotation, and connects the tip of the arm of the height adjustment valve to the tip of the link with a ball joint to detect the height of the air spring. This allows the height of the air spring to be kept constant regardless of the amount of longitudinal and lateral displacement even when the upper and lower mounting portions of the air spring undergo large relative displacements in the longitudinal direction and in the lateral direction.

Next, the present invention will be explained with reference to an embodiment shown in FIGS. 4 and 5. FIG. 4 is a plan view of the height adjustment device, and FIG. 5 is a front view of FIG. 4. In the figures, the same reference numerals as in the above conventional example indicate the same parts. This bogie is a bolsterless type bogie in which the bogie frame 3 and the car body 1 are directly connected by air springs 7, as shown in FIG. The height adjustment valve 11 is attached to the truck frame 3, and an arm 22 is attached to the height adjustment valve 11. A link A23 is attached to the arm 22 via a pin so as to be rotatable in the horizontal direction.
A ball joint 24 is provided at the tip. On the other hand, the link B26 is connected to the link receiver 2 on the vehicle body 1.
The link B26 is rotatably supported in the horizontal direction via a link B26, and the center of rotation A of the link B26 is located on a line connecting the point O of the rotation center of the cart and the point B at the tip of the link A23. . A tumble buckle 25 is provided vertically downward at the tip of the link B26, and the lower end of the tumble buckle 25 is attached to the ball joint 24.

In this configuration, to explain the operation, the link B26 is supported by the link receiver 27 with a pin, and α-α
It can only rotate around the axis. That is, the tip point B of the link B26 is configured not to move in the vertical direction with respect to the vehicle body 1. Also,
If the truck is not rotating relative to the car body 1,
Since the rotation center point O of the truck and the three points A and B at both ends of the link B26 are located on the same straight line, when the truck rotates, the link B
26 rotates around point A, which is an approximate center of rotation close to point O, the center of rotation of the cart. The tambuckle 25 at the tip of this link B26 is connected to the link B2.
6, and points B and B' always overlap on the plan view. The link A23 is connected to the arm 22 attached to the height adjustment valve 11 with a pin, and is rotatable only around the γ-γ axis. On the other hand, the arm 22 of D-B' and the link A23 work together to detect the dimension between point B and the bogie frame 3 and control the height of the air spring. In addition, the link A23 reduces the rotation error due to the rotation of the bogie frame 3 due to the horizontal movement of the bogie frame 3 and the car body 1 and the rotation of the link B26 around the α-α axis around the approximate center point A. It is absorbed by rotation around the γ axis. Further, the height of the air spring 7 can be finely adjusted by adjusting the tanbuckle 25, and changes in the angle formed by B-B'-D due to the rotation of the arm 22 and link A23 around the δ-δ axis and the rotation of the trolley. The change in the angle formed by A-B-C due to this is absorbed by the ball joint 24.

In this embodiment, the height adjustment valve 11 is attached to the bogie frame 3 and the link receiver 27 is attached to the vehicle body 1, but conversely, the height adjustment valve 11 is attached to the vehicle body 1 and the link receiver 27 is attached to the vehicle body 1.
It is also possible to attach it to the bogie frame 3.

As explained above, according to the present invention, by absorbing the displacement caused by the horizontal movement of the bogie frame and car body and the rotation of the bogie by the link A, the link B, and the ball joint, the air spring can be prevented from moving up and down unnecessarily. without compromising the riding comfort.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional cart, Fig. 2 is a side view of a bolsterless type cart, Fig. 3 is a side view of a conventional height adjustment device, and Fig. 4 is a side view of a height adjustment device according to the present invention. FIG. 5 is a plan view showing one embodiment, and FIG. 5 is a side view of FIG. 4. 3...Bolly frame, 7...Air spring, 11...Height adjustment valve, 12...Arm, 22...Arm, 23...Link A, 24...Ball joint, 25...Tumbuckle, 26... ...Link B, 27...Link reception.

Claims (1)

[Claims] 1. In a bolsterless type vehicle bogie, a height adjustment valve is provided on either the bogie or the car body, a link B is attached to the other side so as to be rotatable in the horizontal direction, and a link A is horizontally attached to the arm of the height adjustment valve. The center of rotation of link B is placed on the line connecting the tip of link A and the center of rotation of the cart, and the tip of link A is swung between the connecting rod fixed to the tip of link B and the center of rotation of the truck. An air spring height adjustment device for a vehicle bogie, characterized in that the air springs can be connected together.