Joint arrangement
A joint arrangement for connecting a drawbar to a carriage includes a push/pull device for the transmission of pushing and pulling forces arranged at the carriage end of the drawbar. The push/pull device comprises a mid-piece connected to the carriage side end of the drawbar, extending the drawbar in the longitudinal direction thereof which extends through an opening provided in the baseplate. A front spring plate and a rear spring plate are provided on the mid-piece with a front spring element between the front spring plate and the baseplate in the drawbar longitudinal direction and a corresponding rear spring element is provided between the baseplate and the rear spring plate. The front spring element and the rear spring element enclose the mid-piece of the push/pull device with a positive fit in order to guide and support the mid-piece of the push/pull device in the most effective manner possible within the baseplate and are themselves supported in the vertical direction on the baseplate and in particular on a recess region provided in the baseplate.
1. A joint arrangement for linking a draw bar to a coach body, comprising a base plate connected to the coach body, the base plate having an inlet opening; and
a draw/buffing gear arranged at the coach body end of the draw bar for transmitting tractive and impact forces acting on the draw bar to the base plate, the draw/buffing gear having
a centre piece connected to the coach body end of the draw bar and extending the draw bar in its longitudinal direction, the said centre piece extending through the inlet opening in the base plate and having a front spring plate on the draw bar side and a rear spring plate on the coach body side,
at least one front spring element of resilient material arranged between the front spring plate and the base plate in the longitudinal direction of the draw bar,
at least one rear spring element of resilient material arranged between the base plate and the rear spring plate in a longitudinal direction of the draw bar in order to absorb the tractive and impact forces to be transmitted,
the at least one front spring element and the at least one rear spring element positively surrounding the centre piece of the draw/buffing gear and each being supported in the vertical and in the horizontal direction against the edge of the inlet opening in the base plate
the base plate including respective recess regions provided in an end face on the draw bar side and/or in an end face on the coach body side extending at least partially along the respective peripheries of the inlet opening provided in the base plate and having shapes matching contours of the front and/or the rear spring element, the respective front and rear spring elements lying flush in the associated recess regions and being supported against the recess regions.
2. The joint arrangement according to claim 1 wherein the shape of a cross section of the inlet opening provided in the base plate is designed so as to allow for horizontal swiveling of the centre piece of the draw/buffing gear extending through the inlet opening within a prescribed angular range, for deflection of the draw bar connected to the centre piece about the Z-axis.
3. The joint arrangement according to claim 1 , wherein the at least one front spring element and/or the at least one rear spring element each have an elliptical, oval, ellipse-like or similar cross-sectional shape at least at their respective pressure plate ends.
4. The joint arrangement according to claim 3 , wherein the at least one front spring element and/or the at least one rear spring element each have an elliptical or ellipse-like cross-sectional shape with a horizontally extending major axis and a vertically extending semi-axis at their respective pressure plate ends.
5. The joint arrangement according to claim 1 wherein the at least one front spring element and the at least one rear spring element each have a through hole, through which the centre piece of the draw/buffing gear extends, the through hole formed in the front spring element and/or the through hole formed in the rear spring element each having an elliptical, oval, ellipse-like or similar cross-sectional shape, and
the centre piece of the draw/buffing gear has a cross-sectional shape corresponding to the respective through hole at least in the portions extending through the through hole formed in the front spring element and/or through the through hole formed in the rear spring element, whereby the portions bearing flush against an inner contour of the through hole.
6. The joint arrangement according to claim 5 , wherein the through hole formed in the front spring element and/or the through hole formed in the rear spring element each have an elliptical or ellipse-like cross-sectional shape with a horizontally extending major axis and a vertically extending semi-axis.
7. The joint arrangement according to claim 6 wherein the at least one front spring element and the at least one rear spring element are pretensioned between the respective spring plates and the base plate in the direction of traction/impact.
8. The joint arrangement of claim 2 wherein the prescribed angular range is ±25°.
9. The joint arrangement of claim 5 wherein each through hole is centrally arranged in said at least one front spring and/or said at least one rear spring.
10. The joint arrangement according to claim 1 wherein the shape of a cross section of the inlet opening provided in the base plate is designed so as to allow for horizontal swiveling of the centre piece of the draw/buffing gear extending through the inlet opening within a prescribed angular range, for deflection of the draw bar connected to the centre piece about the Z-axis.
11. The joint arrangement according to claim 10 , wherein the at least one front spring element and/or the at least one rear spring element each have an elliptical, oval, ellipse-like or similar cross-sectional shape at least at their respective pressure plate ends.
12. The joint arrangement according to claim 11 , wherein the at least one front spring element and/or the at least one rear spring element each have an elliptical or ellipse-like cross-sectional shape with a horizontally extending major axis and a vertically extending semi-axis at their respective pressure plate ends.
13. The joint arrangement according to claim 1 wherein the at least one front spring element and the at least one rear spring element each have a through hole, through which the centre piece of the draw/buffing gear extends, the through hole formed in the front spring element and/or the through hole formed in the rear spring element each having an elliptical, oval, ellipse-like or similar cross-sectional shape, and
the centre piece of the draw/buffing gear has a cross-sectional shape corresponding to the respective through hole at least in the portions extending through the through hole formed in the front spring element and/or through the through hole formed in the rear spring element, whereby the portions bearing flush against an inner contour of the through hole.
14. The joint arrangement according to claim 13 , wherein the through hole formed in the front spring element and/or the through hole formed in the rear spring element each have an elliptical or ellipse-like cross-sectional shape with a horizontally extending major axis and a vertically extending semi-axis.
15. The joint arrangement according to claim 12 wherein the at least one front spring element and the at least one rear spring element are pretensioned between the respective spring plates and the base plate in the direction of traction/impact.
16. The joint arrangement according to claim 2 wherein the at least one front spring element and the at least one rear spring element each have a through hole, through which the centre piece of the draw/buffing gear extends, the through hole formed in the front spring element and/or the through hole formed in the rear spring element each having an elliptical, oval, ellipse-like or similar cross-sectional shape, and
the centre piece of the draw/buffing gear has a cross-sectional shape corresponding to the respective through hole at least in the portions extending through the through hole formed in the front spring element and/or through the through hole formed in the rear spring element, whereby the portions bearing flush against an inner contour of the through hole.
17. The joint arrangement according to claim 16 , wherein the through hole formed in the front spring element and/or the through hole formed in the rear spring element each have an elliptical or ellipse-like cross-sectional shape with a horizontally extending major axis and a vertically extending semi-axis.
18. The joint arrangement according to claim 17 wherein the at least one front spring element and the at least one rear spring element are pretensioned between the respective spring plates and the base plate in the direction of traction/impact.