Rail vehicle, in particular a locomotive

Abstract

A rail vehicle, such as a locomotive, has at least one undercarriage with one or more wheel sets and an undercarriage frame. A vehicle body, resiliently supported on the undercarriage, has a vertical pivot pin passing through the undercarriage frame for traction linking the vehicle body. A limiting stop is connected to the pivot pin for limiting the vertical motion of the vehicle body relative to the undercarriage frame. The pivot pin has a horizontal through-hole in a downwardly protruding pin segment for supporting the limiting stop. Contact protrusions of the limiting stop protrude from the through-hole on both sides of the pivot pin. In the event of maximum vertical motion, the limiting stop contacts the undercarriage frame from below by way of the contact protrusions. The entrainment of the undercarriage is thus effected with great safety when the rail vehicle is lifted.

Claims

1. A rail vehicle, comprising: at least one undercarriage having one or more wheel sets and an undercarriage frame resiliently supported on said one or more wheel sets; a vehicle body resiliently supported on said at least one undercarriage; a vertical pivot pin passing through said undercarriage frame, said pivot pin traction linking said vehicle body and said undercarriage and allowing said undercarriage to rotate relative to said vehicle body; said pivot pin having a pin segment projecting downward from said undercarriage frame and a horizontal through-hole formed through said pin segment; a limiting stop connected to said pivot pin for limiting a vertical movement of said vehicle body relative to said undercarriage frame, said limiting stop being mounted in said through-hole and having contact protrusions projecting on both sides of said pivot pin, said contact protrusions of said limiting stop contacting said undercarriage frame from below in the event of a maximum vertical movement of said vehicle body relative to said undercarriage frame.

2. The rail vehicle according to claim 1 configured as a locomotive.

3. The rail vehicle according to claim 1, wherein each said contact protrusion has an upward-facing, level contact surface, with which said limiting stop abuts against said undercarriage frame from below in the event of the maximum vertical movement.

4. The rail vehicle according to claim 1, which comprises securing devices disposed to secure said limiting stop against changes of a position thereof in said through-hole.

5. The rail vehicle according to claim 4, wherein said securing devices comprise at least one collar on said limiting stop and a securing element connected to said pivot pin, said securing element engaging in a positive form-fit on said collar to secure said limiting stop against displacement.

6. The rail vehicle according to claim 4, wherein said securing devices comprise at least one arresting surface integrally formed on a periphery of said limiting stop and a securing element connected to said pivot pin and abutting said arresting surface to secure said limiting stop against rotation.

7. The rail vehicle according to claim 1, wherein at least one of said contact protrusions is formed with a taper toward an outer end thereof.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) Further properties and advantages of the inventive rail vehicle emerge from the following description of an exemplary embodiment on the basis of the drawings, in which schematically

(2) FIG. 1 shows an inventive rail vehicle standing on a track,

(3) FIG. 2 shows the rail vehicle according to FIG. 1 lifted off the track and

(4) FIG. 3 shows a perspective view from below of the undercarriage of the inventive rail vehicle in the region of the pivot pin.

DESCRIPTION OF THE INVENTION

(5) A rail vehicle 1, for example a locomotive, comprises two undercarriages 2, each with two wheel sets 3, by way of which the undercarriages 2 according to FIG. 1 stand on a track 4. Each undercarriage 2 has an undercarriage frame 5 which is resiliently supported on the wheel sets 3. The rail vehicle 1 further comprises a vehicle body 6 resiliently supported on the undercarriages 2. From the vehicle body 6 a vertical pivot pin 7 protrudes downward for each undercarriage 2 and for the traction linking of the vehicle body 6 passes through the undercarriage frame 5, and about which an undercarriage 2 can rotate in relation to the vehicle body 6. The rail vehicle 1 additionally comprises limiting stops 8 connected to the pivot pin 7 to limit the vertical motion of the vehicle body 6 in relation to the undercarriage frame 5 in a form-fit manner. If the rail vehicle 1 is lifted off the track 4 by engagement on the vehicle body 6 according to FIG. 2, the vehicle body 6 moves vertically away from the undercarriages 2, until the limiting stops 8 achieve a form-fit with the undercarriage frame 5 and from then on lift the undercarriages 2 too.

(6) According to FIG. 3 the pivot pin 7 passes through a cross-support 9 of the undercarriage frame 5. The pivot pin 7 protrudes through a pin opening 10 in the cross-support 9 and at least in the region of the pin opening 10 has a rectangular external cross-section. For the damped traction linking of the vehicle body 6 when the undercarriages 2 accelerate or decelerate, buffer elements 11 are arranged in the pin opening 10 on the cross-support 9 in the direction of travel in front of and behind the pivot pin 7. The pivot pin 7 has a pin segment 12 protruding downward from the cross-support 9 of the undercarriage frame 5, with fastening elements 15 for transverse dampers (not shown) sticking out from the free end of the pin segment 12 in the shape of a crown. Additionally the pin segment 12 has a horizontal through-hole 13 extending transversely to the direction of travel. The limiting stop 8 is bolt-shaped and embodied with a round cross-section and is mounted preferably without any play and centered in the through-hole 13. As a result contact protrusions 14 of the limiting stop 8 protrude on both sides of the pivot pin 7, the limiting stop 8 contacting the cross-support 9 from below with said contact protrusions 14 in the event of maximum vertical motion. So that this contact takes place in a defined manner and without damage, level contact surfaces 16 are integrally formed by milling off on the upper sides of the contact protrusions 14, and in the event of contact abut on a lower boom 17 of the cross-support 9 to the side of the pin opening 10. The two contact protrusions 14 have chamfers 18 on their undersides and are therefore designed to taper toward their outer ends. This means the limiting stop 8 can be inserted more easily into the through-hole 13 when it is assembled. Additionally weight can be saved as a result. The inserted limiting stop 8 is then secured by securing means against changes of position in the through-hole 13. The securing means comprise a securing element 19 which is connected to the pivot pin 7, is designed as a rectangular sheet-metal part and is attached edgewise to the pivot pin 7 by means of two screws such that it covers the through-hole 13 in the shape of a segment of a circle. The securing means further comprise a keep out area 20 which is milled off on the contact protrusion 14 of the limiting stop 8, is designed to be level and is oriented vertically. At the transition from the contact protrusion 14 provided with the keep out area 20 to the bolt-shaped central segment of the limiting stop 8 with a circular cross-section a collar 21 is designed as part of the securing means. The securing element 19 engages in a form-fit manner on the collar 21, so that any displacement of the limiting stop 8 in the through-hole 13at least in a direction of displacementis blocked. Additionally the securing element 19 abuts linearly on the keep out area 19, so that any distortion of the limiting stop 8 in the through-hole 13 is blocked. Preferably the securing means are arranged point-symmetrically on both sides of the pivot pin 7.