JPS6117709B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single leaf spring type axle box support device for a bogie for a railway vehicle.

In a conventional single leaf spring type axle box support device for a railway vehicle bogie, a conical cylindrical elastic member is arranged between one end of the single leaf spring and one side of the axle box so that its axis is in the vertical direction. For example, the special public
Known by No. 21763. In this type of device, the rigidity of the conical cylindrical elastic member is the same in both the front and rear and left and right directions.

By the way, if the rigidity in the left and right direction is relatively large, the running performance of the vehicle will deteriorate.

Therefore, in order to make the stiffness of this type of elastic member relatively small in the left-right direction, it has already been proposed that a conical cylindrical elastic member is interposed so that its axis is in the left-right direction (patent application 53−75838
issue).

However, in this latter case, since the rigidity of the conical cylindrical elastic member in the torsional direction is small, the axle box easily rotates. It has the disadvantage that it comes into contact with the inner peripheral surface of the guide tube that is attached to the side beam of the frame so as to hang down. Further, since the metal fittings for sandwiching and supporting the conical cylindrical elastic member as described above have to have a conical cylindrical shape, there is a drawback that the cost is high due to the shape.

An object of the present invention is to eliminate the above-mentioned drawbacks, to increase the rigidity of the elastic member interposed between one end of the single leaf spring and one side of the axle box in both the longitudinal and torsional directions, and to simultaneously increase the rigidity in both the longitudinal and torsional directions. It is an object of the present invention to provide a single leaf spring type axle box support device for a railway vehicle bogie that has relatively low directional rigidity and is low in cost.

The safety tube and guide tube of the axle box have the following roles.

(1) Restriction of forward/backward and left/right movement between the axle box and the bogie frame (usually there is a gap of approximately 3 mm between the safety ring and the inner peripheral surface of the guide cylinder).

(2) Lift up the axle box with wheel axle together with the truck frame.

(3) Safety device in case the leaf spring of the support device breaks.

To achieve the above object, the single leaf spring type axle box support device for a railway vehicle bogie according to the present invention has an elastic member interposed between one end of the single leaf spring and one side of the axle box. The elastic member is characterized in that it has a flat plate shape that is inclined only in the front-back direction.

According to the present invention, since the elastic member interposed between one end of the single leaf spring and one side of the axle box has a flat plate shape that is inclined only in the front-back direction, the bogie vibrates in the front-back direction. In this case, compressive and shear stress is generated in the elastic member, and its rigidity is large as before.If the truck vibrates in the left-right direction, only shear stress is generated in the elastic member, and its rigidity is relatively small. Also, if the elastic member is twisted,
Compressive and shear stress is generated in the elastic member, and its rigidity is high, so that it is possible to maintain good running performance of the vehicle and at the same time prevent the axle box safety member from tilting. In particular, since the elastic member has a flat plate shape, the metal fittings to sandwich and support it are
Since it is sufficient to have a flat plate shape, the cost is reduced. Note that by changing the inclination angle of the elastic member, its rigidity can be changed as appropriate.

Embodiments of the invention will be described below with reference to the drawings.

In Figures 1, 2, 3, and 4, one end of each of a pair of single leaf springs 3 is attached to a retaining plate on a leaf spring mounting seat 2 on the side of the bogie frame at the bottom of the side beam 1 of the bogie frame of a railway vehicle bogie. The leaf spring mounting seat 2 and the single leaf spring 3 are mounted on the mounting portion by bolts and nuts 5, and the opposing surfaces of the leaf spring mounting seat 2 and the single leaf spring 3 have serrations 6 and 7 that engage with each other, respectively.

A leaf spring seat 8 is arranged inside each other end of the single leaf spring 3, and the inside of each leaf spring seat 8 has two inclined surfaces 9 that are inclined in the front-rear direction. 9 are inclined in opposite directions with respect to the vertical center plane of the leaf spring seat 8.

A serration 10 is provided on the outer surface of each leaf spring seat 8.
Each inner surface of the single leaf spring 3 facing the single leaf spring 3 has a serration 11, and the serration 1
0 and 11 are interlocked with each other.

At each other end of the single leaf spring 3 and at the center of each leaf spring seat 8, holes 12 and 13 for inserting bolts are formed, respectively.

On one side of the axle box 14, there is a plate spring mounting seat 1 on the axle box side.
5, and two inclined surfaces 16 which are inclined in the front and rear direction are provided on both upper and lower sides of the leaf spring mounting seat 15.
and two inclined surfaces 16 on both the upper and lower sides.
are inclined surfaces in directions opposite to each other with respect to the vertical center plane of the leaf spring mounting seat 15, and are opposed to the inclined surfaces 9 of the leaf spring seat 8, respectively.

A hole 17 is formed in the center of the leaf spring mounting seat 15 for inserting a spacer to be described later.

Between each leaf spring seat 8 and leaf spring mounting seat 15,
Upper and lower elastic members 18 are interposed, respectively.

Each elastic member 18 has a flat plate shape that is inclined only in the front-rear direction.

The upper and lower elastic members 18 are, for example, two rubber plates 19 with steel plates 20 integrally attached to the upper and lower surfaces of the elastic members 18 by vulcanizable adhesive. A hole 21 is formed at the center of the elastic member 18, that is, at the center of the steel plate 20, so as to be inclined in opposite directions with respect to the central plane, and through which a spacer and a bolt, which will be described later, are inserted.

The spacer 22 has a cylindrical shape, and the upper and lower leaf spring seats 8
It is inserted into the hole 17 of the leaf spring mounting seat 15 and the hole 21 of the elastic member 18 between them.

A press plate 2 is provided on the outside of each other end of the single leaf spring 3.
3 is arranged, and the holding plate 23 has a hole 24 for inserting a bolt.

A bolt 25 is inserted through the holding plate 23, the single leaf spring 3, the leaf spring mounting seat 8, the elastic member 18, and the spacer 22, and is tightened with a nut 26.

As shown in FIG. 4, a protrusion 27 is formed in the center of the steel plate 20, a recess 28 is provided in the center of the leaf spring mounting seat 15, and the protrusion 27 is fitted into the recess 28. The elastic member 18 can be attached,
Alternatively, as shown in FIG. 5, the protruding end 29 of the steel plate 20 may be attached to the leaf spring mounting seat 15 with a bolt 30 or a dowel pin.

A safety pair 31 stands upright on the top of the axle box 14,
A gap is provided between the safety tube 31 and the inner peripheral surface of the guide tube 32 in the guide tube 32 which is attached to the side beam 1 of the bogie frame so as to hang down.

Note that 33 indicates an axial spring.

According to the above structure, when the truck vibrates in the longitudinal direction, the rubber plate 19 of the elastic member 18 interposed between the leaf spring seat 8 and the leaf spring mounting seat 15
Compression and shear stress are generated, and the rigidity thereof is a large appropriate value, and when the truck vibrates in the left-right direction, only shear stress is generated in the rubber plate 19 of the elastic member 18, so its rigidity is relatively low. When a torsional action is applied to the rubber plate 19 of the elastic member 18, compression and shear stress are generated on the rubber plate 19, and its rigidity is large. Contact between the safety lever 31 of the box and the guide tube 32 is prevented.

Moreover, since the steel plate 20 for supporting the elastic member 18 across the rubber plate 19 also has a flat plate shape, the cost is reduced.

Note that by changing the inclination angle of the elastic member 18, its rigidity can be changed as appropriate.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the present invention, and FIG.
This is the case when viewed in the direction of the arrow from the line A--A in the figure, FIG. 2 is a partially longitudinal side view, and FIG. 3 is a
FIG. 4 is a plan view of the elastic member, FIG. 4 is a longitudinal sectional view of the elastic member, and FIG. 5 is a longitudinal sectional view of another embodiment of the elastic member. 3...Single leaf spring, 14...Axle box, 18...Elastic member.

Claims (1)

[Claims] 1. In a single leaf spring type axle box support device for a railway vehicle bogie in which an elastic member is interposed between one end of the single leaf spring and one side of the axle box, the elastic member is inclined only in the front and rear direction. A single leaf spring type axle box support device for a railway vehicle bogie, characterized by having a flat plate shape.