JPH057567U - Railcar axle box support device - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the weight of the device and improve riding comfort by reducing the number of components. [Structure] A roll rubber receiving outer cylinder 10 attached to a lower spring seat 9 formed on the front and rear sides of the axle box 2 and a tip of a rod 7 provided at the center of an upper spring seat 6 provided at the end of the side beam 3. The roll rubber 5 capable of rolling and deforming is fitted into the space between the fitted roll rubber receiving inner cylinder 8 and the upper spring seat 6 and the lower spring seat 9 are attached.
The shaft spring 1 is composed of a combination body in which the coil spring 4 is provided between the shaft spring 1 and the coil spring 4. [Effect] Most of the load is received by the coil spring, and the vertical vibration is appropriately damped by the roll rubber, so that the riding comfort is improved. Further, since the roll rubber receives a force in the left-right direction, no special device is required.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a rail car axle box.

[0002]

[Prior Art]

 The axle box that contains the bearings that support both ends of the wheel axle of a railroad truck is designed to hold back-and-forth movements, allow for lateral pressure relief in the left-and-right directions, and provide cushioning in the up-and-down directions. It is supported by a structured axle box support device. There are various types of axle box support devices such as axle box guard type, axial beam type, leaf spring type, link arm type, rubber type.

As described above, there are various types of axle box supporting devices, but the basic type that is widely used is the type in which a shaft spring is provided on the axle box and the front and rear sides in the traveling direction of the axle box. It is a wing type with a shaft spring.

Although the axial spring can receive a load in the vertical direction, it is insufficient to suppress the movement in the front-back direction and the left-right direction. Therefore, in general, a guide tube composed of a leaf spring, a link, or an inner and outer cylinder is provided between the side beam of the bogie and the axle box.

An example of a currently used wing type axle box supporting device is shown in FIGS. The lower portion of the axle box 13 is extended in the front-rear direction to form a spring seat 14, and a coil spring 16 is mounted between the side beam 15 and the spring seat 14. The inside of the spring seat 14 is hollowed out, and the lower end of the support shaft 17 having the upper end attached to the side beam 15 supports the central portions of the rubber bushes 18 extending in the forward and backward directions in the traveling direction. It is fitted in the inner hole of the spring seat 14.

In the structure of the rubber bush 18, the upper limit of the allowable displacement amount in the vertical direction is small. Therefore, it is necessary to enhance the rigidity of the coil spring 16 and limit the displacement between the bobbin frame and the axle box 13.

Further, since the damping action against the vertical vibration is only the damping due to the shearing force of the material of the rubber bush 18, a sufficient damping effect cannot be obtained. For this reason, oil dampers are installed in parallel when a sufficient damping action against vibrations of high-speed railway vehicles is required.

[0008]

[Problems to be solved by the device]

 As described above, the conventional wing-type axle box support device does not have sufficient damping action for vertical vibrations, and it is necessary to install oil dampers in parallel, and to control the front-rear and left-right movements. Therefore, since the link and the guide tube are installed, the device is complicated and the unsprung load cannot be reduced.

The present invention provides a rail car axle box support device having a sufficient damping action for vertical vibrations and simplifying the structure capable of restricting the movement in the front-rear direction and the left-right direction, excluding the above drawbacks. To do.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the axle box support device for a railway vehicle of the present invention includes a pair of axial springs formed by a combination of a cylindrical roll rubber that causes rolling deformation and a coil spring on the front and rear sides in the traveling direction of the axle box. It is provided between the provided spring seat and the side beam.

[0011]

[Action]

 The load is supported by a pair of shaft springs consisting of a combination of a cylindrical roll rubber that causes rolling deformation and coil springs, which are provided on the front and rear sides of the axle box. By vertically displacing it, it is possible to give appropriate vibration damping, and it is possible to provide soft support in the vertical direction.

The roll rubber is fitted into a guide tube consisting of a roll rubber receiving outer cylinder and a roll rubber receiving inner cylinder, which is attached between the side beam and the spring seat of the axle box, so that the roll rubber can be deformed freely. Since it is possible to absorb the lateral pressure by receiving it, it is not necessary to provide a special mechanism for supporting the wheel axle in the left-right direction. In addition, the roll rubber has a function of preventing rotation of the axle box which is generated by bearing resistance when the vehicle is started.

Since the support in the front-back direction is performed by the guide tube having the roll rubber interposed, the axle box can be reliably fixed in the front-rear direction and shock can be buffered.

[0014]

【Example】

 An embodiment of this invention will be described with reference to the drawings. Figure 1. FIG. 2 is a sectional view showing an axle box supporting device portion of a bogie for a railway vehicle in one embodiment of the present invention, and FIG. 2 is a sectional view of the axle box supporting device portion in another embodiment. The shaft spring 1 is composed of a combination body in which a roll rubber 5 is housed in a coil spring 4, and is installed between a front and rear lower spring seat 9 formed by projecting in the front and rear direction of a shaft box 2 and a side beam 3, respectively. It

The shaft spring 1 is configured as follows. That is, a hole having a diameter smaller than that of the coil spring 4 is formed in the lower spring seat 9 provided in the front-rear direction of the axle box 2, and the roll rubber receiving outer cylinder 10 is fitted therein. On the other hand, a rod 7 is provided at the center of an upper spring seat 6 provided downward at the end of the side beam 3, and a roll rubber receiving inner cylinder is fitted to the lower end of the rod 7. Then, the cylindrical roll rubber 5 is rolled into the space between the roll rubber receiving inner cylinder 8 and the roll rubber receiving outer cylinder 10 so that the roll rubber 5 can be freely deformed. At the same time, the coil spring 4 is fitted between the upper spring seat 6 and the lower spring seat 9 for assembly.

In the case of FIG. 2, the mechanism as a shaft spring is the same as that of FIG. 1 except that the combination of the guide cylinders of the roll rubber 5 is opposite. That is, the roll rubber receiving outer cylinder 11 is attached downward to the end portion of the side beam 3, and the roll rubber receiving inner cylinder 12 is attached to the lower spring seats 9 provided on the front and rear sides of the axle box 2 so that the space between the inner and outer cylinders is reduced. The roll rubber 5 is fitted on the roller so that it can be freely rolled and displaced.

With the above configuration, the coil spring 4 bears most of the load that the shaft spring 1 receives. As shown in FIG. 3, when the rod 7 is moved downward due to downward force, the roll rubber 5 is displaced while rolling in the direction of the arrow. On the contrary, when the rod 7 moves upward, the roll rubber 5 rolls and displaces in the opposite direction. Therefore, the roll rubber 5 provides an appropriate damping. Therefore, the riding comfort is improved by the cooperative action of the coil spring 4 and the roll rubber 5.

When a force is applied to the axial spring in the front-rear direction or the left-right direction of the vehicle, for example, when a force is applied in the arrow direction as shown in FIG. 4, part of the roll rubber 5 (the right part in the figure) is compressed. Control movement.

[0019]

[Effect of the device]

 Most of the load is received by the coil spring by the shaft spring that is a concentric combination of the coil spring and the roll rubber, and the roll rubber provides appropriate damping against vertical vibrations, improving ride comfort. In addition, the reduction in the number of components makes it possible to reduce the weight of the device and facilitate the assembling work.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an axle box supporting device portion of a bogie for a railway vehicle according to an embodiment of the present invention.

FIG. 2 is a sectional view of an axle box supporting device portion of a bogie for a railway vehicle according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a movement of a roll rubber when a vertical force is applied to a shaft spring.

FIG. 4 is an explanatory diagram showing the movement of the roll rubber when a force in the front-rear direction or the left-right direction is applied to the axial spring.

FIG. 5 is a cross-sectional view showing an example of a conventional wing type axle box supporting device for a railway vehicle.

6 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols] 1 shaft spring 2 shaft box 3 side beam 4 coil spring 5 roll rubber 6 upper spring seat 7 rod 8 roll rubber receiving inner cylinder 9 lower spring seat 10 roll rubber receiving outer cylinder 11 roll rubber receiving outer cylinder 12 roll rubber receiving inner cylinder 13 Shaft Bushing 14 Spring Seat 15 Side Beam 16 Coil Spring 17 Support Shaft 18 Rubber Bushing

Claims (1)

[Claims for utility model registration] [Claim 1] A pair of shaft springs made of a combination of a cylindrical roll rubber that causes rolling deformation and a coil spring, provided on the front and rear sides in the advancing direction of the housing, and a side beam. A rail car axle box support device installed in between.