WO2015051841A1

WO2015051841A1 - Resilient intermediate piece for clamping a rail base

Info

Publication number: WO2015051841A1
Application number: PCT/EP2013/071099
Authority: WO
Inventors: Winfried BÖSTERLING; Nicole Wiethoff
Original assignee: Vossloh-Werke Gmbh
Priority date: 2013-10-09
Filing date: 2013-10-09
Publication date: 2015-04-16
Also published as: US20160244919A1; RU2016117880A; KR20160064209A; EP3055459B1; CN105658871A; EP3055459A1; ES2741152T3

Abstract

The invention relates to a system and to an intermediate element for a system (1, 1') for fixing a rail (S) for a rail vehicle to a base (U). The intermediate element (12, 12') is provided to be arranged between an end section (7, 8) of a spring element (3, 3') and the rail (S), such that the spring element (4, 4') transmits a holding-down force (N, N') to the rail (S) via the intermediate element (12, 12'). The intermediate element (12, 12') has a supporting surface (14), on which the end section (7, 8) of the spring element (3, 3') lies during use, and a standing surface (22), with which the intermediate element (12, 12') is seated on the rail (S) during use. According to the invention, the intermediate element (12, 12') is designed to be resiliently compliant in an active direction (W) directed from the supporting surface (14) toward the standing surface (22). As a result of the installation of an intermediate element (12, 12') according to the invention in a rail fixing system, the risk of shortening the service life of the spring element (3, 3') which is used to hold down the rail in the system, as a result of periodic movements that occur, is minimized.

Description

ELASTIC INTERMEDIATE PIECE FOR TERMINATION OF A RAIL FOOT

The invention relates to an intermediate element for a system for fastening a rail for a rail vehicle on a substrate. The intermediate element is intended to be arranged between an end portion of a spring element and a rail for rail vehicles, so that in use the spring element on the

Intermediate element transmits a hold-down force on the rail. For this purpose, the intermediate element has a

Support surface on which lies in use, the end portion of the spring element, and a AufStandfläche with which it stands in use on the rail.

Likewise, the invention relates to a with such

Intermediate element equipped system for securing a rail for a rail vehicle on a substrate.

An intermediate element and a system of this kind are

For example, from DE 20 2007 018 500 Ul known. In this known system, a so-called "tension clamp" is used as a spring element, the W-shaped with an middle loop and two outgoing spring arms

is trained. With the free end sections of the

Spring arms is the spring element in each case a receptacle which is formed in the bearing surface of the intermediate element is. The made of an electrically non-conductive plastic intermediate element sits on the top of the rail of the rail attached to the system. The intermediate element separates in this way the rail electrically from the spring element and at the same time ensures a large-scale transmission of hold-down forces on the rail.

When driving over with systems of the type in question formed rail mounting points by a

Rail vehicles can low-frequency movements, which are triggered by the weight load, which by the weight of the respective rail vehicle or the train composed of several rail vehicles

are caused medium-frequency movements caused by the distribution and weight of the axles or

Bogies of the train are triggered, or high-frequency rail movements occur due to geometric

Deviations of the wheels of each crossing

Rail vehicle or damage to the tread of each mounted rail are triggered. Each of these forms of motion can lead to highly dynamic loads on the spring element used to hold down the rail. These can go so far that the spring element in

Resonance device. The spring element is stimulated in its natural frequency and thus can be exposed to very high dynamic stress despite only minor rail movements. As a result of these stresses can lead to premature fatigue or so much wear of the spring element that premature replacement is required. Against the background of the prior art discussed above, the object of the invention was to provide a means with which the risk of a shortening of the life of a system occurring in a system for fastening a rail to a ground to hold down the rail, due to periodic movements, is avoided minimizes used spring element.

Also, a system for fixing a rail should be mentioned, in which by simple means

premature wear of the spring element used in such a system for holding down the rail on the respective substrate is avoided.

To solve the above-mentioned object with respect to the means, the invention provides an intermediate element having the features specified in claim 1.

In order to solve the object mentioned above with respect to the rail fastening system, the invention provides that in such a system, an intermediate element according to the invention is used.

Advantageous embodiments of the invention are specified in the dependent claims and are explained below as the general inventive concept in detail.

The intermediate element according to the invention for a system for fastening a rail for a rail vehicle on a substrate is therefore intended to be arranged between an end portion of a spring element and the respectively to be fastened rail, so that the Spring element transmits a hold-down force on the rail via the intermediate element. In this case, the intermediate element has a support surface on which lies in use the end portion of the spring element, and a AufStandfläche with which it is in use on the rail. According to the invention, the intermediate element is designed to be elastically yielding in a direction of action directed from the support surface to the support surface.

An inventive system for securing a rail for a rail vehicle on a ground, in which the rail has a rail foot, with which it is supported on the ground, comprises accordingly

- A braced against the ground by means of a clamping element spring element, the at least one spring arm with a formed at its free end

Owns end portion, and

an intermediate element designed according to the invention, which stands with its support surface on the foot of the rail and on the bearing surface of which the end section of the rail

Spring arm of the spring element is located.

According to the invention, therefore, between each

fixing rail and each acting on the rail end of the respective spring element

Inserted intermediate element, compared to the insulator intermediate elements used at this point in known rail fastening systems a significantly increased elastic compliance and a correspondingly lower

Stiffness possesses, making it an effective cushioning causes. The intermediate element according to the invention thus provides significantly greater damping properties than the conventional systems for fastening a rail for the purpose of electrical insulation between the

arranged respective spring element and the rail

Isolator elements is the case.

In this way, the invention allows provided with a certain elastic compliance

Intermediate element in use a decoupling of the

Hold-down force exerting spring element of the executed by the rail movements. The arrangement of the present invention elastically formed intermediate element between the ends of the spring element and the rail, the vibration paths of the spring arm ends are reduced and shortened as a result of the damping effect thus achieved, the decay time at a natural vibration of the spring element. In this way, the spring element is protected from excessive load and its life significantly increased.

The inventively predetermined elasticity and

Damping effect of the intermediate element can be ensured by a suitable design or by a suitable choice of material. Thus, it is possible, for example, to produce the intermediate element of a solid material, but to form the manner of a spring so that it is sufficient for the purposes of the invention resilient

Has yielding.

Likewise, it is conceivable to form the intermediate element as a whole from an elastic or damping material which has the required elasticity or damping properties and is so resistant to wear that it withstands the abrasive loads it is exposed to during operation. Corresponding materials are in the

Track superstructure, for example, for intermediate plates in the

Insert, which are placed in a rail fastening point between the respective ground and the rail on it, to a defined compliance of the

Rail to ensure in the direction of gravity.

So that the intermediate element permanently transmits the hold-down forces, which are exerted in use by the respective spring element, permanently on the rail, it can

be useful if the intermediate element has a dimensionally stable portion at the free top of the

Support surface is formed, acts on the spring element with the respective end portion of its spring arm. The elastic element is in this case at the rail associated bottom of the dimensionally stable portion

arranged. In this way, the hold-down forces applied by the spring element in use are distributed over a large area onto the elastic element and prevent the elastic element from acting on it by

possibly sharp-edged end portion of the

Damaged spring element or locally due to a too small contact surface between the spring element and elastic element is so heavily loaded that premature wear occurs.

Alternatively or additionally, the intermediate element may also have a dimensionally stable section, on the underside of which the support surface is formed and, accordingly, on its upper side facing away from the support surface elastic element sits. The dimensionally stable section which is thus arranged in use between the elastic element and the rail protects the elastic element, in particular against abrasive wear, which may otherwise occur on contact of the elastic element with the generally rough surface of the rail.

Optimal effect and durability of a

The intermediate element according to the invention results when the elastic element is dimensionally stable between two

Sections is arranged, that is, both at its the respective end portion of the spring element associated upper side and at its rail associated

Bottom through a dimensionally stable section of the

above-explained type is shielded.

The above-explained, at least one dimensionally stable section presupposing embodiments of

inventive intermediate element prove to be

particularly useful if the elastic element is one made of an elastic,

In particular, a viscoelastic material existing situation which is covered by the respective dimensionally rigid portion. However, it is also conceivable here to form the elastic element as a separately prefabricated spring, which is coupled to the respective dimensionally rigid section.

In practice, the dimensionally stable portions can each consist of a wear-resistant, hard material having a strength sufficient to absorb the loads occurring in use and a sufficient To ensure dimensional stability of each section.

For example, the dimensionally stable sections may be made of metal. In terms of her

However, it is advantageous for use properties and the cost of their manufacture if the dimensionally stable sections are made of a plastic material. Plastics that come into question for this purpose are known per se from the production of insulating intermediate elements of the type described above. They not only provide sufficient

Wear resistance and strength, but are also electrically non-conductive.

In advantageous case for practical use, that the intermediate element of at least one wear-resistant, acting as a vibration or electrical voltage isolator hard component that makes contact with the rail or tension clamp, and acting as a damper elastic soft component is formed, the

Soft component in the manufacturing process to the

Hard component, d. H. the respective dimensionally rigid portion, are applied so that a cohesive connection is made. This can be done by spraying or sprueing. However, it is equally possible, the respective dimensionally stable section and the elastic

Component prefabricate separately and subsequently assembled to the intermediate element. For this purpose, the elastic element can be adhesively bonded, in particular adhesively bonded or vulcanized, to the respective dimensionally stable element, for example, or in some other way,

For example, be connected by positive locking. From a manufacturing point of view, it may be expedient if, in the event that the elastic element is to be arranged as an intermediate layer between two dimensionally stable sections, the dimensionally stable sections via a web of a

Material to connect with each other, the lower one

Has elasticity than the elastic element, so that the dimensionally stable portions and the web has a receptacle on the upper side, the underside thereof and one of them

Surround longitudinal side, in which the elastic element sits. This embodiment has the advantage that the dimensionally stable sections which are connected to one another via the web can be produced in one piece in one operation, for example, from a suitable solid plastic. The web can thereby by minimizing its

Wall thickness can be easily designed so that it does not hinder the necessary elastic compliance of sitting between the dimensionally stable sections elastic element.

A particular for use in systems for

Rail fastening, in which a W-shaped tension clamp is used as a spring element, particularly suitable embodiment of an intermediate element according to the invention is characterized in that it is elongated guaderförmig. In this way, the end portions of the spring arms of such a clamping spring element can act together on a single intermediate element on the rail. However, it is of course also possible to assign each a single intermediate element each of the spring arms.

To a particularly secure support of each assigned end portion to ensure on the support surface of an intermediate element according to the invention, may be formed on the support surface form elements on which in use the associated end portion of the

Spring element is supported.

Hereinafter, the invention with reference to a

Embodiment illustrative drawing closer

explained. Each show schematically:

Fig. 1 is an attachment point for a rail in a

Section transverse to the longitudinal extent of the rail;

Fig. 2 shows an intermediate element for a system for fixing the rail in a perspective view.

The fastening point B shown in FIG. 1 comprises two identically constructed systems 1, 1 'for fastening the conventionally formed rail S to one

for example, by a concrete sleeper or a

Each one system 1,1 'is arranged on one of the longitudinal sides of the rail S. The rail S is part of a track, not shown further for rail vehicles and has a rail foot F, a web standing thereon and a rail head supported by the bridge, on the free top, the tread for the wheels of the

Railway vehicle is formed.

The systems 1, 1 'each comprise a guide plate 2, 2', one each on the conventional W-shaped one

Clamp trained spring element 3,3 'sits. The Spring element 3,3 'is each formed by means of a conventional sleeper screw

Clamping element 4,4 'braced against the substrate U, by a through the respective guide plate 2,2' extending from the top to the bottom

Passage opening inserted and in each case one in the underground U recessed plastic dowel 5.5 '

is screwed.

The guide plate 2,2 'is each in the manner of a

conventional angle guide plate formed. On its underside assigned to the underground U, it has a shoulder with which it sits in a form-fitting manner in a correspondingly formed groove 6, 6 'which is formed in the ground and extends along the rail S. With her the foot F of the rail S facing Aniagefläche the respective guide plate is 2,2 'at the respective her

associated longitudinal side of the rail foot F on. In this way, the rail S through the guide plates 2,2 'on their respective longitudinal side side

supported. The guide plates 2, 2 'guide the transverse forces Q, which occur when a rail vehicle passes over the attachment point B, into the ground U.

In order to give the rail S in the attachment point B a defined compliance in the direction of gravity K, between the rail foot F and the substrate U a usually used for this purpose, made of an elastically yielding material intermediate layer Z is placed.

The respective spring element 3, 3 'of the systems 1, 2 exercises over the end sections 7, 8 of its middle loop 9 outgoing spring arms 10,11 each resiliently a hold-down force Ν, Ν 'on the foot F of the rail S, with the rail S is kept pressed against the ground U.

Between the respective end portions 7,8 of

Spring elements 3,3 'and the foot F of the rail S is seated in each case an intermediate element 12,12'.

The parallelepipedally elongate shaped and identically formed intermediate elements 12, 12 'each have a length extending across their length LZ and width BZ

plate-shaped first dimensionally rigid portion 13, on the upper side of a support surface 14 for the respective associated end portions 7,8 of the spring elements 3,3 'is formed. At the front ends 15,16 of

Intermediate elements 12,12 'adjacent end portions of the support surface 14 while mold elements 17,18 are formed, each having a trough-like, in the longitudinal direction L of the intermediate element 12,12' extending receptacle 19,20

circumscribe. In these receptacles 19,20 sits in use the respectively associated, straight shaped end portion 7,8 of the spring elements 3,3 '. The end sections 7, 8 are guided in this way on their longitudinal sides so that they are seated on the respective intermediate element 12, 12 ', also at

stronger relative movements between the spring element 3,3 'and rail S safely maintained.

In addition, the intermediate elements 12, 12 'also have a plate-shaped, second dimensionally stable section 21, which is arranged at a distance from the first section 13 in a direction aligned normal to the support surface 14 and also extends over the length LZ and width BZ of the respective intermediate element 12,12 '. At the rail F associated bottom of the second

dimensionally stable portion 21 is a flat AufStandfläche 22 is formed, with which the respective intermediate element 12,12 'in use on the associated surface of the

Rail foot F is sitting.

The dimensionally stable sections 13, 21 are connected to one another via a web 23 which extends along one longitudinal side 24 of the intermediate elements 12, 12 '. Viewed in a section transverse to the longitudinal extent L of the intermediate elements 12,12 ^λ embrace the dimensionally stable portions 13,21 and the web 23 accordingly in the manner of a "C" a slot-shaped receptacle 25 which opens in the use position in the direction of the respective spring element 3,3 ' is and extends over the length of the intermediate element 12,12 '.

The dimensionally stable sections 13,21 and the web 23 of

Intermediate elements 12, 12 'are molded integrally in an injection molding process from a solid, dimensionally stable plastic, which is, for example, polyamide, which may optionally be fiber-reinforced or particle-reinforced.

In the receptacle 25 of the intermediate elements 12,12 'sits in each case an elastic element 26, which consists of a

viscoelastic compliant plastic material,

for example, a mixed or closed-cell material, for example polyetherurethane or ethylene-propylene-diene rubber. In a central portion of the intermediate element 12,12 'is from the longitudinal side, which is assigned in use to the respective spring element 3,3', over the height H of the intermediate member 12,12 'extending circular arc-shaped recess 27 formed in the at fully assembled systems 1,1 'the arc of the U-shaped center loop 9 of the respective spring element 3,3' engages.

In the production of the intermediate elements 12,12 ', the material of the elastic member 26 is injected into the receptacle 25, so that a cohesive permanent bond between the dimensionally stable sections 13,21 and the web 23 on the one side and the elastic member 26 on the other side yields.

The arrangement of the elastic element 26 in the receptacle 25 on the one hand has sufficient dimensional stability and, on the other hand, a defined elastic compliance of the intermediate elements 12, 12 'in a direction of action W corresponding to the effective direction of the hold-down force N.

guaranteed, which is aligned by the support surface 14 in the direction of the AufStandfläche 22.

As a result of the viscoelastic properties of the respective element caused by the elastic element 26

Intermediate element 12,12 'are particularly high and medium frequency, occurring when driving over the attachment point B by a rail vehicle movements of the rail S at most attenuated to the respective

Transfer spring element 3,3 '. The danger of that

respective spring element 3,3 'in resonance and prematurely worn, is minimized. The intermediate elements 12, 12 muds have the

described inventive design in addition to the high elasticity and the associated damping effect in the direction of action W high rigidity in a direction transverse to the direction of action W direction. In this way, a high push-through resistance is ensured by a relative movement between the respective

Intermediate element 12,12 and the associated spring element 3,3 ^{X is} guaranteed.

According to an embodiment not shown here, the second dimensionally stable section 21 can also be omitted. In this case, the elastic element 26 is located in the mounting position directly on the associated surface of the

Rail foot F on. If a suitable material is available, it would also be conceivable to use the elastic element 26 itself as an intermediate element or to position it in the sense of a sandwich between two dimensionally stable layers, by which the uniform distribution of the loads acting on the elastic element is ensured. It is also conceivable to einhausen the elastic element in a solid material, in which case the housing is designed so that the damping effect of

elastic element can still be used.

REFERENCE NUMBERS

1.1 'Systems for fastening the rail S

2,2 'guide plates

3,3 'spring elements

4,4 'clamping screws

5.5 'plastic dowel

6,6 'groove

7.8 end portions of the spring elements 3,3 '

9 middle loop of the spring elements 3,3 '

10.11 spring arms

12,12 'intermediate element

13 first dimensionally stable section of the intermediate elements

12, 12 '

14 supporting surface of the intermediate elements 12, 12 '

15,16 end faces of the intermediate elements 12,12 '

17,18 molded elements

19.20 pictures on the contact surface 14

21 second dimensionally rigid section of the intermediate elements

12, 12 '

22 AufStandfläche the intermediate elements 12,12 '

23 web of intermediate elements 12, 12 '

24 a longitudinal side of the intermediate elements 12,12 '

25 slot-shaped receiving the intermediate elements 12,12 '

26 elastic element of the intermediate elements 12, 12 '

27 recess of the intermediate elements 12,12 '

B attachment point

BZ width of the intermediate elements 12, 12 '

F rail foot

H height of the intermediate elements 12, 12 '

K direction of gravity

L longitudinal direction of the intermediate elements 12, 12 '

LZ length of the intermediate elements 12, 12 '

Ν, Ν 'holding force

Q lateral forces

S rail

Underground (threshold or slab made of concrete)

W direction of action of the elastic compliance of

elastic element 25

Z liner

Claims

P A T E N T A N S P R E C H E

An intermediate member for a system (1,1 ') for fixing a rail (S) for a rail vehicle on a ground (U), said intermediate member (12,12') being provided between an end portion

(7,8) of a spring element (3,3 ') and the rail (S) to be arranged, so that the spring element

(4,4 ') via the intermediate element (12,12') a

Hold-down force (Ν, Ν ') on the rail (S)

and wherein the intermediate element (12, 12 ') has a support surface (14) on which, in use, the end section (7, 8) of the spring element (3, 3') lies, and a support surface (22) with which it rests seated in use on the rail (S), characterized in that the

Intermediate element (12,12 ') in one of the

Bearing surface (14) to the support surface (22)

directed direction of action (W) is elastically yielding.

Intermediate element according to claim 1, characterized in that an elastic element (26) is arranged between the support surface (14) and the support surface (22). Intermediate element according to one of the preceding

Claims, d a d u r c h

g e n c i n e s, the s

elastic element (26) consists of a plastic material.

Intermediate element according to one of the preceding

It claims that it has a dimensionally stable portion (13), on the free upper side of the support surface (14) is formed.

Intermediate element according to one of the preceding

It claims that it has a dimensionally stable section (21), on the underside of which the support surface (22) has a dimensionally stable section (21).

is trained.

Intermediate element according to claim 2 or 3 and according to claims 4 and 5, d a d u r c h

The elastic element (26) between the dimensionally stable sections is, for example, the same

(13,21) is arranged.

Intermediate element according to claim 6, d a d u r c h

e e s e s e s e s t e, s e s s the dimensionally stable sections (13,21) via a web (23) of a

Material are interconnected, the lower one Has elasticity as the elastic element (26), and that the dimensionally stable sections (13, 21) and the web (23) delimit a receptacle (25) on its upper side, its lower side and its one longitudinal side, in which the elastic element (26 ) sits.

8. Intermediate element according to claim 7, d a d u r c h

In other words, the dimensionally stable sections (13, 21) and the web (23) are made in one piece.

9. intermediate element according to one of the preceding

Claims, d a d u r c h e g e k e n e, in that the respective dimensionally stable portion (13,21) is made of a plastic material.

10. Intermediate element according to one of the preceding

Claims, according to the invention, the elastic element (26) with the

respective dimensionally rigid portion (13,21) is connected cohesively.

11. Intermediate element according to claim 10, d a d u r c h

in that the elastic element (26) is injection-molded onto the respective dimensionally stable section (13, 21). Intermediate element according to one of the preceding

Claims, d a d u r c h e c e n e e c h e a s it is formed elongated cuboid.

13. intermediate element according to one of the preceding

Claims, characterized in that it has a longitudinal side in which a recess (27) is formed, into which engages in use a portion (9) of the spring element (3,3 '), the at least one end portion (7,8) in use on the support surface (14) of the intermediate element (12,12 ') is supported.

14. intermediate element according to one of the preceding

Claims, d a d u r c h e k e n e c e s, s e s s on the support surface (14) form elements

(17,18) are formed on which in use, the associated end portion (7,8) of the spring element (3,3 ') is supported.

System for fastening a rail (S) for a

Rail vehicle on a ground (U), the rail (S) having a rail foot (F) with which it is supported on the ground (U), comprising:

- one against the ground (U) by means of a

Clamping element (4,4 ') braced spring element (3,3'), the at least one spring arm with a has its free end formed end portion (7,8), and

an intermediate element (12, 12 ') designed according to one of claims 1 to 14, which is provided with its

On the support surface (22) stands on the foot (F) of the rail (S) and on the support surface (14) of the end portion (7,8) of the spring arm of the spring element (3,3 ').