Base plate for supporting a rail for a rail vehicle and fastening point having plate of this type

Abstract

A base plate, which is made of plastic and is intended for supporting a rail for a rail vehicle on a substrate, may include a lower face, and an upper face on which a supporting surface for the rail is formed, a recess, from which a passage leads to the upper face of the base plate, being formed in the lower face of the base plate, the diameter of the recess in a direction transverse to the longitudinal axis of the passage being greater at least in part than the diameter of the passage, so that a stop for an insert piece fitted into the recess is formed on the top surface, assigned to the upper face of the base plate of the recess.

Claims

1. A base plate, which is made of plastic and is intended for supporting a rail for a rail vehicle on a substrate, the base plate comprising a lower face, assigned to the substrate, and an upper face on which a supporting surface for the rail is formed, at least one recess, from which a passage leads to the upper face of the base plate, being formed in the lower face of the base plate, the diameter of the recess in a direction transverse to the longitudinal axis of the passage being greater at least in part than the diameter of the passage, so that a stop for a component fitted into the recess is formed on a top surface, adjacent to the upper face of the base plate, of the recess, and a component, an abutment for rotationally secure support of the component is provided on an inner surface surrounding the recess, wherein the component fitted into the recess is an insert piece which is made of a material having a higher strength compared with the plastic material of the base plate and is supported with a counter-bearing, formed on one of its outer surfaces, on the abutment of the recess and with its upper face against the top surface of the recess, and wherein the insert piece comprises a lower face, assigned to the lower face of the base plate, starting from which a recess in which a passage formed into the insert piece and aligned flush with the passage of the base plate opens, the recess of the insert piece being configured for rotationally secure reception and support of a head of a clamping element, a threaded shank of which is fed during use through the passages of the insert piece and of the base plate, and at least one shaped element for supporting or guiding at least one component additionally arranged on the base plate is formed on the upper face of the base plate, wherein a heel is formed onto the upper face of the insert piece, and, wherein, in a region in which the passage of the base plate merges into the top surface of the recess of the base plate, a seat for the heel, which is shaped in accordance with the heel, is formed.

2. The base plate according to claim 1, wherein at least the passage of the insert piece has a non-circular opening cross section.

3. The base plate according to claim 2, wherein the opening cross section has a rectangular shape.

4. The base plate according to claim 1, wherein the abutment of the recess of the base plate is formed on an inner circumferential surface of the recess of the base plate and the counter-bearing of the insert piece is formed on an outer circumferential surface of the insert piece.

5. The base plate according to claim 1, wherein at least two distributed abutments of the recess of the base plate are provided, and an equal number of counter-bearings of the insert piece, which are shaped and arranged in accordance with the abutments are provided.

6. The base plate according to claim 5, wherein the abutments the recess of the recess of the base plate and the counter-bearings of the insert piece are distributed at equal angle intervals around the longitudinal axis of the passages of the base plate and insert piece.

7. The base plate according to claim 1, wherein the passage of the insert piece extends through the heel in such a way that the heel bounds the passage of the insert piece at least on two opposite sides.

8. The base plate according to claim 1 wherein the heel is configured as a conical heel.

9. The base plate according to claim 1, wherein the size and shape of the passage of the base plate and the size and shape of the heel are matched to one another in such a way that the heel is aligned with its free upper face at least flush with the upper face of the base plate or protrudes beyond the upper face of the base plate.

10. The base plate according to claim 1, wherein the insert piece is formed from a metal material.

11. A fastening point, at which a rail is fastened on a substrate, comprising a base plate configured according to claim 1, on the supporting surface of which the rail is supported, a spring element which exerts a resiliently elastic retaining force on a foot of the rail to be fastened, and a clamping element which comprises a head, with which it is held rotationally securely in the recess of the insert piece seated in the recess of the base plate, and a threaded shank which is formed onto the head, is fed through the passages of the insert piece and of the base plate and onto which a nut, which is supported on the clamping element by means of the spring element is screwed.

12. The fastening point according to claim 11, wherein the base plate has a rectangular base shape in plan view, over the width of which the supporting surface, arranged centrally in relation to the length of the base plate, on which the rail is supported extends, wherein the recess with the insert piece seated therein is respectively formed in sections of the base plate which protrude laterally beyond the rail.

13. The fastening point according to claim 11, wherein at least one passage leading from the upper face to the lower face, through which a fastening screw that fixes the base plate on the substrate is fed, is additionally formed into the base plate.

14. The fastening point according to claim 13, wherein a second recess with a second insert piece and a second passage is arranged point-symmetrically as seen in a plan view of the base plate in regard to the recess.

15. The fastening point according to claim 11, wherein the shaped element is a shoulder and the additional component is a guide plate, which forms a lateral guide for the rail with the guide plate's end surface assigned to the rail and which guide plate is supported on the shoulder with its opposite end surface, wherein the guide plate comprises a passage, through which the threaded shank of the clamping element is fed, aligned flush with the passages of the base plate and of the insert piece, and wherein the spring element is supported on the guide plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention will be explained in more detail below with the aid of a drawing which represents an exemplary embodiment. The figures show, in each case schematically:

(2) FIG. 1 a fastening point according to the invention for a rail for a rail vehicle in a view from above;

(3) FIG. 2 the fastening point according to FIG. 1 in a section along the section line A-A indicated in FIG. 1;

(4) FIG. 3 a base plate according to the invention in perspective view;

(5) FIG. 4 the base plate according to FIG. 3 in a view from below;

(6) FIG. 5 an insert piece in perspective view;

(7) FIG. 6 the insert piece according to FIG. 5 in plan view;

(8) FIG. 7 the insert piece according to FIG. 5 in a view from below;

(9) FIG. 8 the insert piece in a section along the section line B-B indicated in FIG. 6.

DESCRIPTION OF THE INVENTION

(10) At the rail fastening point 1, a rail S is fastened on a solid substrate U (shown here only in sections), formed for example by a concrete sleeper.

(11) The rail fastening point 1 comprises a base plate 2, which has a rectangular configuration in plan view (FIG. 1) on its free side 3 and has a supporting surface 4 arranged centrally in relation to its length L, on which the rail S is supported with its rail foot F. Arranged between the supporting surface 4 and the lower face of the rail foot F, there is in this case a resilient layer E which imparts a certain resilient flexibility, directed in the vertical direction V, to the supporting of the rail S in relation to the substrate U.

(12) The base plate 2 is made from a plastic material which is established for this purpose in the prior art.

(13) The two side sections 5, 6, protruding laterally from the supporting surface 4, are configured point-symmetrically as seen in plan view. In this case, again as seen in plan view, one corner region 7 of the side sections 5, 6 is respectively rounded, whereas another corner region is pronouncedly angular. A passage 10 extending from the upper face 3 to the lower face 9 of the base plate 2 is respectively formed centrally in the corner region 8. The threaded shank respectively of a fastening screw 11, 12, with which the respective fastening screws 11, 12 are respectively screwed into a dowel 13 placed in the substrate U, is fed through the passages 10. The base plate 2 is fixed on the substrate U by means of the fastening screws 11, 12.

(14) In the respective other corner region 7 of the side sections 5, 6, a shoulder 14, 15 raised in the vertical direction V, the side of which assigned to the rail S is chamfered, is respectively formed adjacent to the respective narrow side of the base plate 2. The chamfered side of the shoulder 14, 15 ends at the foot of the respective shoulder 14, 15 in a channel 16, 17, which extends parallel to the longitudinal direction LS of the rail S and is divided into two parts by a web 18 aligned transversely to the shoulder 14, 15 and to the longitudinal direction LS.

(15) At the height of the web 18, a passage 19, 20 leading from the upper face 3 to the lower face 9 of the base plate 2 is respectively provided between the respective channels 16, 17 and the assigned edge of the supporting surface 4. The passages 19, 20 respectively have a basically rectangular opening cross section, the long axis of which is aligned parallel with the longitudinal extent L of the base plate 2. In a central region, the opening cross section of the passages 19, 20 is in addition semicircularly widened in the width direction B of the base plate 2. In this way, the passages 19, 20 are shaped so that a clamping element 21, configured as a locking screw, can be fed through the passages 19, 20 with its head 22 and its threaded shank 23, with the head 22 first.

(16) The head 22 of the clamping element 21 is distinguished in that two cuboid projections 24, which protrude on opposite sides in the radial direction from the threaded shank 23 are formed in its region. The passages 19, 20 are in this case dimensioned in such a way that the head 22 and the shaft 23 can be fed through them with slight clearance.

(17) From its lower face 9, a recess 25, 26, which is aligned concentrically with the respective passage 19, 20, is formed into the base plate 2 in the region of the passages 19, 20. The opening area of the recesses 25, 26 is in this case greater than the opening area of the passages 19, 20 at every position, so that the passages 19, 20 are enclosed by a circumferential collar, on the lower face of which facing towards the respective recess 25, 26 the respective top surface 27, 28 of the relevant recess 25, 26 is formed.

(18) The inner circumferential surfaces 29, 30 of the recesses 25, 26 are shaped point-symmetrically in relation to the respectively assigned passage 19, 20 as seen in a plan view of the lower face of the base plate 2 (FIG. 4). In this case, a straight circumferential wall section 31a, 31b aligned in the width direction B is respectively followed by a concave inwardly curved section 32a, 32b, which meets a convex bulging section that is in turn connected to the straight second wall section 31b opposite the first straight circumferential wall section 31a. The edges delimiting the passage 19, 20 in its central region are chamfered by the respective recess 25, 26, so that a seat tapering conically in the direction of the respective passage 19, 20 is formed there.

(19) The two convex bulging sections formed in this way opposite one another on the circumferential surfaces 29, 30 respectively form an abutment 33a, 33b for rotationally secure holding of a component fitted into the respective recess 25, 26.

(20) This component is, according to the invention, respectively an insert piece 34, which is cast from a steel casting material and therefore has a very much higher strength and wear resistance than the rest of the material of the base plate 2. The outer shape of the insert pieces 34 fitted into the recesses 25, 26 is matched to the shape of the recesses 25, 26 in such a way that the insert pieces 34 are seated in the respective recess 25, 26 albeit with a sufficient clearance for easy insertion, but accurately. To this end, the insert pieces 34 respectively comprise on their outer circumferential face 35 two diametrically opposite indentations, which form counter-bearings 36a, 36b by which the insert pieces in the recesses 25, 26 are secured against rotation about the longitudinal axes of the respectively assigned passages 19, 20. The counter-bearings 36a, 36b are respectively followed by an arch-shaped bulging section 37a, 37b, which is matched to the inwardly curved section 32a, 32b of the inner circumferential surfaces 29, 30 of the recesses 25, 26 and respectively merge into a straight section 38a, 38b of the outer circumferential surface 35, which is matched to the straight section 31a, 31b of the recess 25, 26.

(21) From its upper face 39, a passage 40 is formed into the insert piece 34, the opening cross section of said passage being rectangularly configured and dimensioned in accordance with the opening cross section of the passages 19, 20 of the base plate 2. In the central region of its longitudinal sides, the passage 40 is respectively oppositely bounded by the halves of a conical heel 41, which is raised on the upper face 39 of the insert piece 34 and the outer circumferential surfaces 35 of which are chamfered in the direction of the longitudinal axis LX of the passage 40, starting from the upper face 39.

(22) By means of the conical heel 41, the insert piece 34 is centred on the chamfered edge regions of the respective passage 19, 20. In this case, its height above the upper face 39 of the insert piece 34 and its circumferential dimensions are matched to the material thickness remaining between the top surface 27, 28 of the respective recess 25, 26 and the upper face 3 of the base plate 2, in such a way that the conical heel 41 engages through the respective passage 19, 20 of the base plate 2 and is aligned with its free side level with the upper face 3 of the base plate. In this case, the conical heel 41 is seated in a self-centring fashion in the region of the circular widening of the passages 19, 20 by means of its conically chamfered surfaces.

(23) At the same time, the insert piece 34 is supported with its upper face 39 against the top surface 27, 28 of the respective recess 25, 26.

(24) The passage 40 opens in a recess 42, which is formed from its lower face into the respective insert piece 34. The recess 42 has, seen in a plan view of the lower face of the insert piece 34 (FIG. 7), a point-symmetrical configuration. In this case, it has a central cuboid section 43 which is aligned concentrically with the longitudinal axis LX and transversely to the passage 40. This cuboid central section 43 is sunk into the region of the insert piece 3 over which the halves of the conical heel 41 are raised. In the corner regions, assigned to the two counter-bearings 36a, 36b, diametrically opposite one another and arranged on the outer side of the respective insert piece 34, of the recess 42, a heel respectively used as a stop 44a, 44b is formed. When the clamping element 21 is fed with its head 22 through the respective passage 19, 20 of the base plate 2 and the passage 40, aligned flush therewith, of the respective insert piece 34, the projections 24 bear laterally on the respectively assigned stop 44a, 44b and in this way are held rotationally securely against the torques acting on the clamping element 21 during use.

(25) The corner region 45a, 45b respectively lying opposite the stops 44a, 44b is, however, lowered over a section in the shape of a quarter circle extending between the central section 43 of the lowered part 42 and the passage 40. In this way, the head 22 of the clamping element 21, after it has passed through the passage 40, may be swivelled through a quarter revolution about the longitudinal axis LX of the passage 40, until its projections 24 are arranged over the further-lowered central section 43 of the recess 42. If the respective clamping element 21 is subsequently loaded in its longitudinal direction in tension out from the recess 42 through the passage 40, the head 22 with its projections 24 is pulled into the central section 43 and is held there rotationally securely.

(26) After the clamping elements 21 have been positioned and locked in this way in the insert pieces 34 seated in the respective recess 25, 26 of the base plate 2, a guide plate 50 configured in the manner of a conventional angle guide plate is respectively placed between the shoulders 14, 15 and the supporting surface 4 of the base plate 2. To this end, the guide plates 50 respectively comprise a centrally arranged passage 40, through which the respectively assigned clamping element 21 is fed with its threaded shank 23 protruding from the respective passage 19, 20.

(27) The guide plates 50 are supported with their one end side on the respective chamfered side of the assigned shoulder 14, 15, and are seated with the heels formed on the lower face in the respectively assigned channel 16, 17 of the base plate 2. The other end side of the guide plate 50, on the other hand, is directed towards the side edge of the rail foot F and in this way forms a lateral guide for the rail S, by means of which transverse forces, which occur when the vehicle passes over the rail fastening point 1, are dissipated into the base plate 2 and from there into the substrate U.

(28) Seated on the guide plates 50, there is respectively a spring element 55 configured in the manner of a conventional ω-shaped tensioning clamp, which acts with the free end of its spring arms on the upper face of the rail foot F. In this case, a plate-shaped insulating element 56, by means of which the spring element 55 and the rail S are electrically insulated from one another, is arranged between the respective end sections of the spring element 55 and the rail foot F.

(29) At the same time, the threaded shank 23 of the respectively assigned clamping element 21 is fed through the central loop 57 of the spring element 55. A nut 58 is screwed onto the end, correspondingly protruding freely over the central loop 57, of the threaded shank 23. This nut is pulled in a manner known per se for spring elements of the type, to which the spring element 55 belongs, to such an extent that the central loop 57 of the respective spring element 55 is swivelled against the upper face 3 of the base plate 2 for the generation of a sufficient retaining force. In this case, even under high tensile loads, the coupling, which takes place according to the invention respectively by means of an insert piece 34 of the respective clamping element 21 onto the base plate 2, ensures that no material fatigue or overloading takes place in the region of the recesses 25, 26 of the base plate 2.

(30) This is assisted by the fact that the insert piece 34 is supported with the free upper face, extending as far as the upper face 3 of the base plate 2, of its conical heel 41 against the lower face of the guide plate 50, so that the guide plate 50 takes away at least some of the forces acting in the longitudinal direction of the clamping element 21, which are absorbed by the insert piece 34. The material present between the top surface 27, 28 of the respective recess 25, 26 and the upper face 3, is then correspondingly relieved of load.

(31) The invention therefore provides a base plate 2, which is made of plastic and is intended for supporting a rail S for a rail vehicle on a substrate U, the base plate 2 comprising a lower face 9 and an upper face 3 on which a supporting surface 4 for the rail S is formed, a recess 25, 26, from which a passage 19, 20 leads to the upper face 3 of the base plate 2, being formed in the lower face 9 of the base plate 2, the diameter of the recess 25, 26 in a direction transverse to the longitudinal axis LX of the passage 19, 20 being greater at least in part than the diameter of the passage 19, 20, so that a stop for an insert piece 34 fitted into the recess 25, 26 is formed on the top surface 27, 28, assigned to the upper face 3 of the base plate 2, of the recess 25, 26, and an abutment 33a, 33b being provided on an inner surface 29, 30 of the recess 25, 26 for rotationally secure support of the insert piece 34, which is made of a material having a higher strength compared with the plastic material of the base plate 2 and is supported with a counter-bearing 36a, 36b, formed on one of its outer surfaces 35, on the abutment 33a, 33b of the recess 25, 26 and with its upper face 39 against the top surface 27, 28 of the recess 25, 26, and a recess 42, in which a passage 40 aligned flush with the passage 19, 20 of the base plate 2 opens, being formed in the insert piece 34 from its lower face, the recess 42 of the insert piece 34 being configured for rotationally secure reception and support of a head 22 of a clamping element 21, the threaded shank 23 of which is fed during use through the passages 40 of the insert piece and base plate 2.

REFERENCES

(32) 1 rail fastening point 2 base plate 3 upper face of the base plate 2 4 supporting surface of the base plate 2 5, 6 side sections of the base plate 2 7, 8 corner regions of the side sections 5, 6 9 lower face of the base plate 2 10 passage 11, 12 fastening screws 13 dowel 14, 15 shoulders of the base plate 2 16, 17 channel of the base plate 2 18 web of the base plate 2 19, 20 passages of the base plate 2 21 clamping element 22 head of the clamping element 21 23 threaded shank of the clamping element 21 24 cuboid projections of the head 25, 26 recesses of the base plate 2 27, 28 top surfaces of the recesses 25, 26 29, 30 inner circumferential surfaces of the recesses 25, 26 31a, 31b straight circumferential wall sections of the inner circumferential surfaces 27, 28 32a, 32b inwardly curved section of the inner circumferential surfaces 27, 28 33a, 33b abutment 34 insert piece 35 outer circumferential surface of the insert piece 34 36a, 36b counter-bearing of the insert piece 34 37a, 37b outwardly curved sections of the insert piece 34 38a, 38b straight sections of the insert piece 34 39 upper face of the insert piece 34 40 passage of the insert piece 34 41 conical heel of the insert piece 34 42 recess 43 central cuboid section of the recess 42 44a, 44b heels used as a stop 45a, 45b corner regions of the recess 42 50 guide plates 55 spring element 56 insulating element 57 central loop of the spring element 58 nut B width direction of the base plate 2 E resilient layer F rail foot L length/longitudinal extent of the base plate 2 LS longitudinal direction of the rail S LX longitudinal axis of the passage 40 of the insert piece 34 S rail U substrate V vertical direction