JPH092262A - Truck for rolling stock - Google Patents

Abstract

PURPOSE: To eliminate external force such as forced kinking to bearings so as to improve durability in a truck for rolling stock supporting two wheels to a dead axle through the bearings to connect the lateral wheels by providing an elastic body between each bearing and each wheel so as to allow axial dislocation between the bearing and wheel. CONSTITUTION: Bearings 5 are inserted on the inside of wheels 1, 2 respectively with elastic bodies 6 placed in between. A dead axle 3 is inserted on the inside of the bearings 5, and both end parts of the dead axle 3 are supported to a truck frame 8 by axle springs 7. A hollow rotary shaft 4 is provided between the lateral wheels 1, 2 in the state of being direct-coupled to both wheels 1, 2 so that the lateral wheels 1, 2 and the rotary shaft 4 are formed into integral shape. Accordingly, when the lateral wheels 1, 2 roll on rails al, a2, vibration transmitted from the rails a1, a2 to the wheels 1, 2 is absorbed to a certain extent by the elastic bodies 6, and flexure of the dead axle 3 is also absorbed by the elastic bodies 6 so as to reduce external force such as forced kinking to the bearings 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railcar bogie, and more particularly to a railcar bogie having a wheel axle assembly structure in which wheels are rotatably installed on a fixed axle.

[0002]

2. Description of the Related Art In a bogie for a railway vehicle having a structure in which a wheel is supported on a fixed axle via a bearing, in the conventional method, as described in JP-A-57-7757, the bearing and the wheel are directly press-fitted. For example, as shown in FIG. 2, between the left and right wheels 1 and 2, the fixed axle 3 is surrounded and the axle is formed into a double structure. A bogie device for a railway vehicle, in which left and right wheels 1 and 2 are joined by a rotating shaft 4 that is directly connected and rotates, has been considered.

[0003]

In the above structure, the axial spring load is applied to both ends of the fixed axle 3,
Since the fixed axle 3 tries to bend in a mountain by receiving the axial spring load between the rail and the wheel tread surface, the bearing 5 is twisted. Therefore, the life of the bearing 5 may be shortened.

Further, in the structure shown in FIG.
The method of substituting the double-structured axle between the left and right wheels 1 and 2 for the motor as it is can be applied, but in such a case, the unsprung weight will increase and the track will increase compared to the conventional parallel cardan type railway vehicle drive device. It is also possible that the burden on

[0005]

The above problem can be solved by providing an elastic body between a bearing and a wheel in a bogie for a railway vehicle having a structure in which a wheel is supported by a fixed axle via a bearing.

[0006]

With the above construction, when the vehicle moves forward or backward, the left and right wheels and the rotating shaft rotate integrally with each other through the bearing around the fixed axle to roll on the rail. The vibrations from are absorbed to some extent by the elastic body that ties the wheel and is installed between the wheel and the bearing. Further, the axial spring load is applied to both ends of the fixed axle by the axial spring, and the fixed axle tries to bend in a mountain by receiving the axial spring load between the rail and the tread of the wheel. The flexure of the fixed axle is absorbed by the elastic body installed between and.

[0007]

An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1, in a bogie for a railway vehicle, first, on the left and right rails a1 and a2, the left and right wheels 1,
2 is placed in a rotatable state, the bearings 5 are inserted inside the wheels 1 and 2 with elastic bodies 6 interposed therebetween, and the fixed axle 3 is inserted inside the bearings 5. There is. Then, at both ends of the fixed axle 3, the bogie frame 8 is provided by the shaft spring 7.
I support.

Between the left and right wheels 1 and 2, a hollow shaft-shaped rotary shaft 4 is directly connected to the left and right wheels 1 and 2, and the left and right wheels 1 and 2 and the rotary shaft 4 are integrally formed. There is. As described above, the fixed axle 3 penetrates the inside of the rotary shaft 4, and between the left and right wheels 1 and 2, the axle has the double structure of the fixed axle 3 and the rotary shaft 4.

In the above structure, when the vehicle moves forward or backward, the left and right wheels 1 and 2 and the rotary shaft 4 rotate integrally with each other through the bearing 5 around the fixed axle 3 to rotate the rail. Roll on the rails a1 and a2.
The vibrations from are absorbed to some extent by the elastic body 6 that ties the wheels 1 and 2 and is installed between the wheels 1 and 2 and the bearing. Further, an axial spring load is applied to both ends of the fixed axle 3 by the axial spring 7, and the axial spring load is applied to the rails a1 and a.
The fixed axle 3 tries to bend in a mountain by receiving it between the wheel 2 and the tread surface of the wheel, but the deflection of the fixed axle 3 is absorbed by the elastic body 6 installed between the wheels 1 and 2 and the bearing 5. . Therefore, in the structure as shown in FIG. 2, the twisting due to the flexure is loaded on the bearing 5, but by adopting the structure as shown in FIG. 1, the flexure of the fixed axle 3 causes the wheels 1, 2 and the bearing 5 to be Since it is absorbed by the elastic body 6 installed between the two, the twisting against the deflection is canceled, the load on the bearing 5 is reduced, and the life of the bearing 5 can be extended.

Further, since the vibrations from the rails a1 and a2 are absorbed by the elastic body 6 to some extent before the vibrations from the wheels 1 and 2 to the bearing 5, the unsprung weight and the load on the track are reduced. Can be expected.

According to this structure, in the railcar bogie having the structure in which the wheels 1 and 2 are supported by the fixed axle 3 via the bearings 5, the fixed axle 3 is constructed by adopting the structure shown in FIG. Since the flexure of the fixed axle 3 caused by the axial spring load applied to both ends of the bearing is absorbed by the elastic body 6 installed between each wheel 3 and the bearing 5, the twisting against the flexure is canceled out, and the bearing 5 The load on the bearing 5 can be reduced and the life of the bearing 5 can be extended.

Further, since the vibrations from the rails a1 and a2 are absorbed to some extent by the elastic body 6 before the vibrations from the wheels 1 and 2 to the bearings 5, the unsprung weight and the load on the track are reduced. Can be expected.

[0013]

As described above, according to the present invention, it is possible to reduce unnecessary external force such as twisting on the bearing, and to extend the life of the bearing. Moreover, the impact on the track can be reduced by reducing the unsprung load.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an axle according to an embodiment of a bogie according to the present invention.

FIG. 2 is a vertical sectional view of a conventional bogie.

[Explanation of symbols]

1 ... Wheel, 2 ... Wheel, 3 ... Fixed axle, 4 ... Rotation axis, 5 ...
Bearing, 6 ... Elastic body, 7 ... Shaft spring, 8 ... Bogie frame, a1 ... Rail, a2 ... Rail.

Claims (1)

[Claims] 1. A bogie for a railway vehicle in which two wheels are rotatably supported via a bearing on a fixed axle and the left and right wheels are coupled to each other, and the bearing and the wheel are provided between the bearing and the wheels. A bogie for a railway vehicle, which is provided with an elastic body that allows the axial center of the rail to be displaced.