Primary type suspension for railway vehicles

Abstract

 A primary type suspension for railway vehicles consisting of a device capable of providing an independent two-wheel and short shaft bogie with a primary suspension, allowing vertical displacements of the suspension independently of each wheel, maintaining a parallelism and a separation between them by means of an articulated dual connecting rod (1) with two horizontal shafts, which through two bushings (2) coupled to the structure (3) of the bogie itselft, and other two bushings (4) coupled to a part common to the bearing box (6,7) acts as a guide for the suspension spring or springs, and with the help of two articulated bars (12) at its ends coupling the bearing boxes (6,7) to the bogie structure (3), and allowing vertical and parallel displacements of the wheel asembly.

Description

BACKGROUND OF THE INVENTION

[0001] The present specification refers to a Patent of Invention regarding a primary type suspension for railway vehicles, the evident object of which is to constitute a device providing an independent two-wheel and short shaft bogie with a primary suspension for railway vehicles, allowing vertical displacements of the suspension independently of each wheel, maintaining, as a consequence, a parallelism and a separation between same.

FIELD OF THE INVENTION

[0002] This invention applies to the industry devoted to manufacture railway vehicles and accessories.

RELATED ART

[0003] It is well known how difficult is for the railway vehicles to keep a parallelism of wheels, as well as a separation between them on an independent wheel and short shaft bogie when it is fitted - with a primary suspension, and that, on the other side, it is imperative this condition for a safe running.

[0004] The inventor is, at present, aware of the existence of different primary suspension systems, but none of them has. in fact, an efficient performance of its elements composing it, which results in a deterioration of the carried wheels.

[0005] An evident solution to this problem would be to provide a device or primary suspension for railway vehicles fitted with an articulated dual connecting rod and, at the same time, obtaining a vertical suspension by distorting the spring or - springs mounted between the bearing boxes and the bogie structure, and, at the same time, a side suspension by distortion of resilient bushings.

[0006] Nevertheless, nothing is known, up to now, about the existence of a primary type suspension for railway vehicles obviating this present problem.

SUMMARY OF THE INVENTION

[0007] The primary type suspension for railway vehicles proposed by the invention constitutes, by itself, an evident solution to the current problem in this field.

[0008] In a more specific manner, the envisaged primary type suspension for railway vehicles is constituted starting from an articulated dual connection rod having two horizontal shafts, which, by means of two bushings coupled to the bogie structure, and other two bushings coupled to a part common to a bearing box, acts as a guide for the suspension spring or springs.

[0009] The suspension has two bars articulated at its ends joining the bearing boxes with the bogie structure, so allowing the wheel and short shaft assembly to carry out a vertical and parallel displacement, as well as the bearing boxes, and, furthermore, by means of a strip joining the inner bearing boxes, independent vertical displacements of each of the two bearing - sets are possible, so maintaining a full and absolute separation between them .

[0010] The vertical suspension is obtained by distortion of the spring or springs mounted between the bearing boxes and the bogie frame.

[0011] The side suspension is obtained by distortion of the resilient bushings, the axial characteristic of which is relatively soft in relation to its radial one which is harder, allowing some millimeters of separation simultaneously shown at the two wheels - since both bearing sets are joined through a strip.

BRIEF DESCRIPTION OF THE DRAWING

[0012] In order to supplement the present description and to aid to a better understanding of the features of the invention, the accompanying drawing, which forms part of this description, shows a perspective view of the invention relative to a primary type suspension for railway vehicles.

DETAILED DESCRIPTION OF THE INVENTION

[0013] From this Figure, it can be seen that the envisaged primary type suspension for railway vehicles is constituted starting - from an articulated dual connecting 1 pivoting at two horizontal shafts A and B, which, through two bushings 2, joined with the bogie structure 3 and other two bushings 4 joined with a part 3 common to the bearing box 6, 7, acts as a guide for the suspension spring or springs.

[0014] The invention contemplates two bars 12, articulated at their ends and joining the bearing boxes with the bogie structure 3, allowing the wheel set 8 and the short shaft 9 and bearing boxes 6, 7. to vertically and parallel displace.

[0015] Furthermore, by means of a strip 10 joining the inner bearing boxes 6, 7, they make possible independent vertical displacements of each of two bearing sets, maintaining a separation - between them in a constant way.

[0016] The vertical suspension is obtained by distortion of the spring or springs 11 which are mounted between the bearing boxes and the bogie structure, while the side suspension is obtained by distortion of resilient bushings 2, 4, the axial - characteristic of which is relatively soft in relation to the radial one which is harder, so allowing some millimeters of displacement simultaneously shown at the two wheels, since - the bearing sets are joined through said strip 10.

[0017] In syntesis, it can be said that this primary suspension between an independent wheel bogie frame 3 and a wheel-shaft assembly 9, mounted between two bearing boxes 6, 7, per each wheel 8, of course, disposes of a bearing box, which is fited with a vertical extension 5 acting as a guide for the suspension springs 11 and which is articulated through bushings 4, horizontally turning, at a dual connecting rod 1, which in turn is articulated by means of other horizontally rotating bushings 2, at the bogie frame, so allowing vertical displacements of each of independent wheels.

[0018] Also, the bearing boxes 7 are united to the bogie structure 3 by means of a bar 12, which is articulated at its ends, which, togetherwith the connecting rod 1, allows each of the bearing sets to carry out independent vertical and parallel displacements .

[0019] Likewise, the primary suspension has resilient bushings 2, 4 which permit transverse displacements which are caused by side efforts transmitted to the wheel through the track and that, - due to the resilient characteristics of the bushing, act as a side primary suspension.

[0020] Lastly, the primary suspension stands out against the union of the inner bearing boxes through a strip 10 maintaining a separation between both wheels, but meaning, at the same time, that it allows independent vertical and parallel displacements at each of the wheels.

[0021] The springs 11 can be substituted by rubber sandwiches of appropiate dimensions.

[0022] It is not considered necessary to extend more this description for an expert in the art to understand the scope of the invention and the advantages derived from it.

[0023] The materials, size, shape and arrangement of the components are open to variation, provided that it does not imply any alteration to the essence of the invention.

[0024] The terms under which this specification has been described should be taken in and ample and non limitative sense.

Claims

1.- A primary type suspension for railway vehicles, designed to be mounted between an independent wheel bogie frame (3) and a wheel-shaft assembly (9) mounted between two bearing - boxes (6) and (7) per each wheel (8), characterized in that each of the bearing boxes (6) and (7) has a vertical extension (5) acting as a guide for the suspension springs 11, articulated by means of bushings (4), horizontalle rotating, to a dual connecting rod 1, which, in turn, is articulated by means of other bushings, also horizontally rotating (2), to the bogie frame, so allowing each of both wheels to carry out independent vertical displacements.

2.- A primary type suspension for railway vehicles, according to claim 1, characterized in that the bearing boxes (7) are united to the bogie structure (3) by means of a bar (2) which is articulated at its ends and that, together with the connecting rod (1), allow each of the bearing sets to carry out independent vertical and parallel displacements.

3.- A primary type suspension for railway vehicles, according to claim 1, characterized in that the resilient articulation bushings (2) and (4) permit transverse displacements caused by side efforts transmitted to the wheel - through the track, and, due to the bushing resilience, act as a lateral primary suspension.

4.- A primary type suspension for railway vehicles, according to any of the preceding claims, chrac- terized in that the union of the inner bearing boxes through a strip maintains a separation between both wheels , allowing independent vertical and parallel displacements.

5.- A primary type suspension for railway vehicles, according to any of the preceding claims, characterized in that the springs (11) can be substituted by rubber sandwiches of appropiate dimensions

Drawing