Coupling for rail vehicles
View Patent ↗An articulated coupling for rail vehicles is composed of a fork head having two fork pieces and of a coupling link. The coupling link accommodates a spherical joint which is traversed by a pin secured in the fork head. To fasten the pin in the fork piece, there is provided a wedge which is arranged in the axial direction of the pin and has a concavely curved surface adapted to the cylindrical curvature of the surface of the pin.
1. An articulated coupling for rail vehicles, comprising:
a fork head which is provided for connecting to a first vehicle unit;
two fork elements; and
a coupling lug which is provided for connecting to a second vehicle unit,
wherein a spherical joint is held in the coupling lug and is penetrated by a bolt which is secured in the fork head,
wherein a wedge which fixes the bolt in the fork element and is arranged in the axial direction of the bolt and has a concavely curved surface matching the cylindrical curvature of the surface of the bolt, and
wherein the wedge is clamped in a self-locking fashion between the bolt and a stop face, positioned obliquely with respect to the axis of the bolt, on the fork elements.
2. The articulated coupling as claimed in claim 1 , wherein the wedge is screwed to the fork elements.
3. The articulated coupling as claimed in claim 1 , wherein that wedge is screwed to the bolt.
4. The articulated coupling as claimed in claim 1 , wherein the bolt is cylindrical.
5. The articulated coupling as claimed in claim 1 , wherein the bolt has a flattened stop face which runs axially parallel.
6. The articulated coupling as claimed in claim 5 , wherein the fork element has a stop face which interacts with the stop face of the bolt and is arranged in a normal direction with respect to a longitudinal direction (x) of the fork element.
7. The articulated coupling as claimed in claim 1 , wherein the bolt bears with less than half its circumference against the fork element.
8. The articulated coupling as claimed in claim 1 , wherein the wedge bears against at least one sixth of the circumference of the bolt.
9. The articulated coupling as claimed in claim 1 , wherein the fork element and the wedge together bear against more than two-thirds of the circumference of the bolt.
10. The articulated coupling as claimed in claim 1 , wherein the wedge has a pulling-off device, in particular a pulling-off thread, which can be used to dismount it.
11. The articulated coupling as claimed in claim 1 , wherein a folding bellows is provided to protect the spherical joint 4 .