Articulated coupling, conical threaded ring, method for the production of a mounting of a cutting tool which mounting can disengage when overloaded, as well as a method for energy conversion by means of an articulated coupling

Abstract

The invention relates to an articulated coupling comprising at least one tension-transferring or compression-transferring rod, at least one pressure plate comprising a cutting tool that comprises at least one blade and a central conically shaped recess. Furthermore, the articulated coupling comprises at least one conical threaded ring which comprises an internal thread and is slit in a longitudinal direction, wherein the rod comprises an external thread onto which the conical threaded ring is screwed. The cutting tool is arranged on a conical external surface of the conical threaded ring, wherein the conical threaded ring is arranged at least partially in the conically shaped recess.

Claims

1. An articulated coupling comprising: at least one tension-transferring and/or compression-transferring rod; at least one pressure plate comprising a cutting tool, which comprises at least one blade and a central conically shaped recess; and at least one conical threaded ring, which comprises an internal thread and is slit in a longitudinal direction, wherein the rod comprises an external thread onto which the conical threaded ring is screwed, the cutting tool is arranged on a conical external surface of the conical threaded ring, and the conical threaded ring is arranged at least partially in the conically shaped recess.

2. The articulated coupling according to claim 1, characterized in that the external surface of the conical threaded ring and the recess of the cutting tool essentially have an identical conicity.

3. The articulated coupling according to claim 1, characterized in that the internal thread of the conical threaded ring is metric.

4. The articulated coupling according to claim 1, characterized in that a minor external diameter of the conical threaded ring is arranged in the direction of the at least one blade of the cutting tool.

5. The articulated coupling according to claim 1, characterized in that the conical threaded ring is designed such that said ring can be displaced on the external thread of the rod in the longitudinal direction by means of a force.

6. A method for producing a mounting of a cutting tool, which mounting can disengage upon overload, on a tension-transferring and/or compression-transferring rod, the method comprising: providing the rod with an external thread, introducing the rod into a conical recess of the cutting tool, screwing a conical threaded ring with an internal thread onto the external thread of the rod such that the conical threaded ring is displaceable on the external thread of the rod in a longitudinal direction by means of a force, introducing the rod into a pressure plate.

7. The method according to claim 6, further comprising: displacing the conical threaded ring on the external thread such that flanks of the internal thread are displaced over flanks of the external thread.

8. The method according to claim 6, further comprising: introducing the rod to the pressure plate such that upon displacement of the pressure plate with the cutting tool at least one blade of the cutting tool removes a chip from the rod.

9. The method according to claim 6, further comprising: forming the at least one conical ring such that the external surface of the conical threaded ring and the recess of the cut-ting tool essentially have a substantially identical conicity.

10. The method according to claim 6, wherein screwing the conical threaded ring to the external thread of the rod comprises: arranging a minor external diameter of the conical threaded ring in a direction of at least one blade of the cutting tool.

11. A method for conversion of energy by means of an articulated coupling, the method comprising: providing at least one tension-transferring and/or compression-transferring rod, wherein the rod comprises an external thread; providing at least one pressure plate, said plate comprising a cutting tool, which comprises at least one blade and a central conically shaped recess; providing at least one conical threaded ring, which comprises an internal thread and is slit in a longitudinal direction; screwing the external thread of the rod onto the conical threaded ring; arranging the cutting tool on a conical external surface of the conical threaded ring; and pressing the conical threaded ring into the conically shaped recess, wherein in case of an overload force being applied to the pressure plate, said plate is displaced on the rod, and wherein the conical threaded ring is expanded and displaced translationally on the external thread.

12. The method according to claim 11, further comprising: displacing the conical threaded ring on the external thread such that flanks of the internal thread are displaced over flanks of the external thread.

13. The method according to claim 11, further comprising: introducing the rod to the pressure plate such that upon displacement of the pressure plate with the cutting tool the at least one blade removes a chip from the rod.

14. The method according to claim 11, wherein providing the at least one conical threaded ring comprises: forming the at least one conical ring such that the external surface of the conical threaded ring and the recess of the cut-ting tool essentially have a substantially identical conicity.

15. The method according to claim 11, wherein providing the at least one conical threaded ring comprises: forming the at least one conical ring such that the internal thread of the conical threaded ring is metric.

16. The method according to claim 11, wherein screwing the external thread of the rod onto the conical threaded ring comprises: arranging a minor external diameter of the conical threaded ring in a direction of the at least one blade of the cutting tool.

17. The method according to claim 11, wherein screwing the external thread of the rod onto the conical threaded ring comprises: screwing the external thread of the rod onto the conical threaded ring such that the conical ring is displaceable on the external thread of the rod in the longitudinal direction by means of a force.

Description

(1) Additional advantageous embodiments arise from the following drawings. However, the developments presented there are not to be construed as limiting; rather, the features described there may be combined with one another and with the features described above to form additional embodiments. Furthermore, it is to be noted that the reference characters indicated in the figure description do not limit the protective scope of the present invention, but rather merely refer to the exemplary embodiments shown in the figures. Identical parts, or parts having the same function, have the same reference characters in the following. Shown are:

(2) FIG. 1 a perspective view of an articulated coupling;

(3) FIG. 2 a conical threaded ring;

(4) FIG. 3 a top view of the conical threaded ring;

(5) FIG. 4 a sectional view IV-IV from FIG. 3;

(6) FIG. 5 a longitudinal section through the articulated coupling according to FIG. 1;

(7) FIG. 6 the detailed view VI according to FIG. 5;

(8) FIG. 7 the detailed view VI according to FIG. 6;

(9) FIG. 8 a detailed view of the articulated coupling in the event of an accident.

(10) FIG. 1 shows a perspective view of an articulated coupling 10 comprising two opposing connection plates 12 and 14, which are attachable to railcar bodies of a rail vehicle. The articulated coupling 10 furthermore comprises a rod 16, which connects the connection plates 12 and 14 to each other. The articulated coupling further comprises a coupling component 18, for example a coupling component 18 of a Jacobs bogie (not shown).

(11) FIG. 2 shows a conical threaded ring 20 having a minor diameter 21, which is assigned to a top surface 21.1, and a major diameter 23 opposed in a longitudinal direction 25, which is assigned to a base surface 23.1. The conical threaded ring 20 further has an internal thread. The external surface 24 of the conical threaded ring 20 is designed to be conical in a longitudinal direction 25 and essentially smooth or unprofiled. Furthermore, the conical threaded ring 20 has a radial slit 26 which extends over the complete length 25 of the conical threaded ring 20. The slit 26 permits an expansion of the conical threaded ring 20.

(12) FIG. 3 shows a top view of the base surface 23.1 of the conical threaded ring 20. Two handling openings 27 can be seen with which a tool (not shown) may engage in order to mount the conical threaded ring 20 on the rod 16.

(13) FIG. 4 shows a section IV-IV from FIG. 3. The conical threaded ring 20 can be seen having the continuous slit 26, the handling openings 27, as well as the conical outer surface 24. Furthermore, it can be seen in FIG. 3 that the conical threaded ring 20 comprises a metric internal thread 22.

(14) FIG. 5 shows a longitudinal section of the articulated coupling 10 in an intended operation. The connection plates 12 and 14 are connected to one another by means of a rod 16, wherein the rod 16 is bifurcated in the embodiment shown. A cutting tool 30 is arranged on the rod 16, which tool has blades 34. The cutting tool 30 is mounted on the rod 16, pressed into the connection plate 12 and additionally secured on the rod 16 by means of the conical threaded ring 20. With tensile and compressive loads, forces are transferred to the rod 16 by the connection plate 14 via the rubber buffers 33, which dampen smaller impacts. Forces applied to the connection plates 12 are transferred to the rod 16 via the rubber buffers 33, the cutting tool 30 and the conical threaded ring 20. If, for example, in the event of an impact the connection plate 12 is pushed in the direction 35 of the cutting tool 30 with a force greater than approximately 1500 kN, the rod 16 is pushed through a conical recess 36 identified in FIG. 6, which recess the cutting tool 30 completely passes through. An external thread 50 of the rod 16 identified in FIG. 7 slides over the internal thread 22 of the conical threaded ring 20, wherein said ring thereby expands due to the slit 26. As a result, the rod 6 can move relative to the cutting tool 30. By means of the blades 34, at least one chip (not shown here) is thereby removed in each case from the rod 16. By dint of this deformation work performed by the cutting tool 30, an energy conversion is completed which converts the kinetic energy into thermal and deformation energy. By contrast, smaller impacts are absorbed during normal operation by means of the rubber buffers 33 and do not result in the threaded connection disengaging from the rod 16 and the conical threaded ring 20.

(15) FIG. 6 shows a detailed view VI from FIG. 5 in an intended operation. It can be seen that the conical threaded ring 20 is arranged in a recess 36 of the cutting tool 30. The blades 34 of the cutting tool 30 touch the rod 16. Furthermore, it can be seen that the connection plate 12 can act on the cutting tool 30 via the rubber buffer 33.

(16) FIG. 7 shows a detailed view VII from FIG. 6 in an intended operation. From this it can be seen that the conical threaded ring 20 is arranged in the recess 36 of the cutting tool 30 such that the conicity of the recess 36 and of the conical threaded ring 20 is the same, wherein a minor diameter 52 of the recess is smaller than the minor diameter of the conical threaded ring. In a further embodiment, not shown here, it is provided that the minor diameter 52 of the recess 36 is essentially the same size as the minor diameter 21 of the conical threaded ring 20. The external diameter 20 and the recess taper in the direction of the blades 34. In this way, it is possible for the conical threaded ring 20 to be pressed into the cutting tool 30, wherein a pretensioning of the conical threaded ring 20 may be produced and, therefore, a force-fitting connection is created between the conical threaded ring 20 and the cutting tool 30. Furthermore, it can be seen from FIG. 7 that the external thread 50 of the rod 16 interacts with the internal thread 22 of the conical threaded ring 20.

(17) FIG. 8 shows as an example a detailed view of the articulated coupling 10, with which an overload, caused by an accident, is applied to the rod 16 by a railcar body via a first pressure plate 12. The reaction force is applied accordingly to the rod 16 by a second pressure plate, preferably via the rubber buffer 33 and at least via the cutting tool 30 and the conical threaded ring 20. If the force of the overload is sufficiently strong, the cutting tool 30 is displaced over the rod 16, wherein said rod is displaced in particular by the rubber buffer 33. In particular, a chip (not shown here) is removed by means of the blades 34, which is indicated by the intersection of the blades 34 with the rod in FIG. 8. Upon displacement of the cutting tool 30 on the rod 16, the conical threaded ring 20 essentially remains in its originally mounted starting position. The cutting tool 30, by dint of the application of the overload to the same, is pushed down by the conical threaded ring 20. The rubber buffer is deformed at least by the conical threaded ring during the displacement of the cutting tool, which is indicated in FIG. 8 by the intersection of the conical threaded ring 20 with the rubber buffer 33. In particular, the stroke of the rubber buffer or, as the case may be, of the cutting tool, is restricted by the conical threaded ring.

(18) In FIG. 8 it cannot be seen that when a specific force is applied, in particular when a specific threshold value is exceeded, by the rubber buffer 33 on the conical threaded ring 20, the thread flanks of the external thread of the rod 16 and the thread flanks of the internal thread 22 of the conical threaded ring 20 are displaced translationally over each other. The conical threaded ring 20 expands upon this displacement. A part of the energy introduced by the overload is converted by the in particular elastic deformation of the conical threaded ring 20 and the friction of the thread flanks over each other. After the conical threaded ring 20 and rod 16 are displaced with respect to each other by a height of a thread turn, the conical threaded ring 20 essentially springs back into its original form. If the force after displacement continues to be so great that the thread flanks can be slid over one another, the conical threaded ring 20 expands thread-turn by thread-turn and is displaced relative to the rod 16, until said rod is pushed down by the external thread 50 of the rod 16, or at least one of the threads 22, 50 is destroyed.

(19) With the proposed conical threaded ring 20, which is installed in the articulated coupling 10, and the proposed method, it is advantageously possible to ensure a further stroke of the cutting tool 30 on the rod 16. In particular, with the further stroke an energy conversion occurs by dint of the removal of a chip by means of the cutting tool 30, and the displacement of the conical threaded ring 20 occurs on the external thread 50 of the rod 16.