Railway rolling stock – Body suspension and springs
Reexamination Certificate
1998-04-30
2001-03-27
Morano, S. Joseph (Department: 3617)
Railway rolling stock
Body suspension and springs
C105S199100, C105S199200, C105S199300
Reexamination Certificate
active
06205933
ABSTRACT:
FIELD AND BACKGROUND OF THE INVENTION
The present invention relates to a support for a car body on a chassis.
Such a support is known from DE 44 44 093 A1. The support shown there comprises a rocker support and a fluid-actuated piston-cylinder unit, by means of which the distance between the chassis and the body of the car can be changed. The rocker support has a first support part and a second support part which is arranged between the first support part and the chassis. The second support part lies with a circular-cylindrical rolling surface on a flat rolling surface of the chassis. The first support part lies with a circular-cylindrical rolling surface on a flat rolling surface of the second support part, the axis of the circular-cylindrical rolling surface traveling on the first support part perpendicular to the axis of the circular-cylindrical rolling surface on the second support part. The piston-cylinder unit is inserted between the first support part and the car body. This known support is rather high and therefore requires a relatively large amount of space in vertical direction between the chassis and the car body. This space is not always available.
SUMMARY OF THE INVENTION
The object of the present invention is therefore so further to develop a support of this type which it takes up little space in the axial direction of the piston-cylinder unit.
This object is achieved for a support of this type by the invention. In an arrangement in accordance with the invention therefor, the piston-cylinder unit is at least partially within an annular support part so that an axially available space is used at the same time for the support part and the piston-cylinder unit and a short manner of construction is made possible.
In principle, it is possible for the piston-cylinder unit to act between two support parts, with which therefore the axial distance between these two support parts can be changed by it. However, since upon a change in the axial distance between two support parts, the kinematics of the rocker support is also changed, the piston-cylinder unit is arranged between a part of the car and second support part. The piston then rests in this connection on the part of the car and the cylinder of the piston-cylinder unit resting on the second support part, this second support part being of annular development and the cylinder extending into the second support part. In particular, the piston-cylinder unit is arranged between the chassis and the second support part. This is favorable, in particular, when other hydraulic components and hydraulic lines are also present on the chassis since in such case the pressure fluid can be fed through the piston or the cylinder of the piston-cylinder unit without long lines.
The construction space in axial direction required for the piston-cylinder unit results from the desired maximum change in distance between chassis and car body and the dimensions of the structural parts required for dependable operation. In order to be able to arrange a relatively long piston-cylinder unit in space-saving manner, several support parts are developed in annular shape so that the piston-cylinder unit can extend into several annular support parts.
In accordance with a particularly preferred embodiment, the second support part is of annular development and has a flange with a rolling surface on a hollow cylinder. The first support part is also annular and rests with a rolling surface on the flange of the second support part. In order that the second support part withstands also the high stresses which are frequently required, the hollow cylinder of the second support part protrudes over its flange in the direction towards the first support part. By the long, hollow cylinder the second support part receives the desired stability. The second support part can extend into the inside of the first support part or extend axially outward beyond the first support part.
By the rolling surfaces between the second support part and the one car part as well as between the first support part and the second support part, a sort of universal joint is created between the rocker support and the one car part. In order to form a universal joint between the rocker support and the other car part, a third support part is provided which by two rolling surfaces cooperates with corresponding rolling surfaces on the other car part and on the first support part. The third support part, now, is also developed annularly so that the piston-cylinder unit can be made very long without taking up additional space. In order to obtain high stability of the third support part, it also can be provided with a hollow cylinder with which it passes into the first support part or engages outward axially over the first support part.
If the second or the third support part extends into the first support part, and if the other support part extends over the first support part, then the hollow cylinders of the second and third support parts can be made very long. To be sure, the second support part and third support part then differ from each other in their shape. They can be identical to each other if, they extend the same distance axially outside or inside over the first support part. In order fully to utilize the space available, the hollow cylinders can advantageously extend up to close to a central horizontal plane of the rocker support.
REFERENCES:
patent: 1921913 (1933-08-01), Drenning
patent: 1958806 (1934-05-01), Symington
patent: 5671682 (1997-09-01), Holzl et al.
patent: 4444093 (1995-06-01), None
patent: 1098424 (1968-01-01), None
Farber Martin A.
Mannesmann Rexroth AG
McCarry, Jr. Robert J.
Morano S. Joseph
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