HU207129B - Elastic railway rail-fastening device based on self-locking - Google Patents

Abstract

The rail (5a) of the rail (5) rests on the bottom (4) directly on the bottom (4) and is fastened to it by an elastic member, and the rail foot (5a) and the bottom (5a), on the self-sealing flexible rail rail fastening device of the present invention. (4) or a spacer (3) between the washer (4a). The washer (4a) or the bottom (4) is provided with an upright guide pin (1). The elastic member is a rectangular-shaped, elongated, longitudinal section (2) bent on the shape of an S shape, the curved end of which forms a clamping point (7) on the rail foot (5a), and a portion of the straight line (6) extending further from the rail. the length of the guide pin (1) is provided with a larger rectangular-shaped opening in the longitudinal direction, which is pulled into the guide pin (1) by a loose fit in the assembled state of the rail fastening device (8,9). Figure 20 EN 207 129 Scope of the description: 4 pages (including J sheet)

Description

BACKGROUND OF THE INVENTION The present invention relates to a flexible rail derailleur, in which the rail base is directly or indirectly supported by a support plate and is secured therewith by a resilient member, and a flexible insert is provided between the rail base and the base or support plate.

One of the most important problems in the roll-out of railways and the development of the rail network is the development of a very large number of systems for solving ski reinforcement. These railroads had to meet ever-tougher conditions as the railways evolved, their weight and speed gradually increased, necessitating the construction of newer and newer structures.

Most rail fastening systems use rail bolts to create and maintain clamping or clamping forces. Vertical screws are used to press various rigid or elastic fittings onto the rail foot.

The dr. Attila Horváth “Design and Dimensioning of Rail Anchorages” (Technical Publisher, Budapest, 1984) gives a detailed description of the tasks of rail fastening and the various ways of fastening rail. It deals with the development of new, self-locking clamping rails without washers and describes laboratory testing of rails.

One of the most well-known GEO systems, which have been in use for more than fifty years (see Figure 56 on page 56 of the cited book), is one of the most well-known rail fasteners. In this case, the relatively large washer is usually made with two strong ribs. They are capable of absorbing lateral forces and, in addition, have built-in slots for self-locking anchor bolt (s). Vertical elasticity is increased by the elastic insertion inserted between the rail foot and the washer. This rail anchorage clamps the rail in a well maintained condition with a force of 20-40 kN. However, the bolts must be retightened regularly and fracture of the locking rings is common, resulting in reduced clamping force and vertical elasticity.

The SKL system is also widespread, in which the GEO system is supplemented by the installation of clamping springs (see Figures 70 and 71 on pages 58-59 of the cited book).

The most advanced solution among the various types of rail fasteners is the self-locking spring-loaded springless solutions. They are characterized by the fact that they consist of few parts and do not require any maintenance work as they do not contain loose elements - screws. The best known representative of these types is the so-called. Pandrol-rail fastenings. The essence of this is the special shape of the large diameter spring, which can be clamped into the ribs anchored in the concrete base.

Each of the known rail anchorages has the following disadvantages:

- high material demand;

- multiple parts;

- labor-intensive maintenance;

- the binding and unlocking is partially or completely non-mechanized;

- tendency to loosen.

To overcome the above difficulties, the present invention provides a self-locking flexible rail fastening device which provides a simple, mechanized rail fastening and release, consisting of a single component, at which the clamping force can be increased arbitrarily.

According to the invention, in the case of a rail fastening of the type described in the introduction, the elastic member is a rectangular elastic steel clamp bent at the longitudinal section and bent at the end of the rail a rectangular opening extending longitudinally over the guide pins, which is tucked into the guide pins by loosening tension points when the rail fastener is assembled.

In a preferred embodiment, the torque arm "p" formed by the vertical center line of the guide pin and the vertical distance of the clamping piece on the rail foot is longer than the height "h" between the clamping points with the guide pins.

Advantageously, an abutment (s) is provided at the point of tension formed by the upper edge of the guide pin and the opening of the clamping piece on the rail side and / or the lower edge on the rail opposite side of the rail. These stops can be shoulder or notch.

In a preferred embodiment, the guide pins are integrally formed with the washer, otherwise they may be embedded in the base.

In our experiments it has been found that it is best to make the clamping piece from a spring steel with an average modulus of elasticity of 2,1x10 ⁷ N / cm ² , where the lower limit is 1,8x10 ⁷ N / cm ² and the upper limit is 2,4x10 ⁷ N / cm ² .

In our experiments, it has been found that the elastic padding between the rail sole and the bottom or underlay is most advantageously made of polyethylene, rubber or notched rubber.

The invention will now be described in more detail with reference to an exemplary embodiment thereof, of which:

Figure 1 is a sectional view taken along line A-A of the rail fastener shown in Figure 2;

Figure 2 is a plan view of the rail fastening device according to the invention.

In the exemplary embodiment of Figures 1 and 2, the guide pins (1) extend substantially vertically upwardly from the base plate (4a) attached to the base (4) and are integral therewith. Loosely fit the guide pins (1) to the flexible steel clamp (2). It is in fact a substantially rectangular plate which has a slightly S-shaped bent in its longitudinal section, that is, has a top point (6) and a slight opposite curvature at the end of the rail (5a) on the rail (5a). provides a clamping point. Between the rail foot (5a) and the washer (4a) there is an elastic insert (3) which partially or

EN 207 129 Β completely divides the required elastic properties with the clamping piece (2) and, if necessary, provides electrical insulation.

By means of the rail fastening device according to the invention, the rail foot (5a) is produced by applying a vertical force to the top of the clamp (2) by means of a suitable device, whereby the clamp (2) undergoes an elastic deformation. whereby the guide pins (1) are tensioned at the tension points (8 and 9), and at the point (7) a clamp is transmitted to the rail (5a). Thus, the guide piece (1) on the rail side (5) is fitted with the clamping piece (11) at a height "h" higher than the opposite side, and a reaction force is created at the clamping point (7) of the rail (5a). causing the clamping element (2) to self-lock by the torque lever (10) "p". The torque arm "p" of said reaction force (10) should preferably be as high as possible in the design, since the torque that can be generated as described above depends on the length of this torque arm "p".

Said self-locking means that the relationship between the rail foot (5a) and the clamping member (2) on the side where the clamping force has been applied cannot be resolved. The release of the connection on the opposite side of the guide pin (1) from the rail (5) can be achieved by applying a downward force on the clamping piece (2).

The dimensions of the resilient clamping piece (2) are determined by the size of the guide pins (1) and the height h of the tension points (8 and 9), which is the difference in height, and the length of the torque arm p. . It follows that by selecting the torque lever "p" (10) and the height "h" (11), the size of the clamp can be adjusted.

The advantage of the rail fastening device according to the invention, in addition to the disadvantages mentioned in the introduction, is that it is easy to implement and that maintenance and track maintenance work is considerably simplified.

The invention is, of course, not limited to the embodiment described, but may be accomplished by a number of modifications, which will be apparent to those skilled in the art, without departing from the scope of the invention.

Claims (8)

PATENT CLAIMS A self-locking resilient rail fastening device in which the rail base (5a) rests directly on the base (4) and is secured thereto by a resilient member (5a) and wherein the rail base (5a) and the rail (5a) and a flexible insert (3) is provided between the bottom (4) or the washer (4a), characterized in that the washer (4a) or the bottom (4) has upwardly guiding pins (1) and that the elastic member is a rectangle a flexible steel clamping piece (2) bent in its longitudinal section and bent at S to form a clamping point (7) on the rail foot (5a) and a guide pin (1) in a straight line away from its top point (6). a rectangular opening (2a) which is larger than its length and which, when assembled, is provided with a loose fit forming tension points (8, 9) is pulled on the guide pins (1). Rail fastening device according to claim 1, characterized in that the torque arm (10) formed by the vertical center line of the guide pin (1) and the vertical distance of the clamping piece (2) to the clamping point (7) on the rail base (5) is longer. , as the value "h" (11) of the clamping piece (2) between the clamping points (8, 9) of the clamping piece (2). Rail fastening device according to Claim 1 or 2, characterized in that the guide rail (1) on the guide rail (1) and on the rail (5) side of the guide rail (1) and the opening (2a) of the clamping piece (2). a stop (s) formed in place of the tension points (8,9) on the opposite side of the rail (5). Rail fastening device according to Claim 3, characterized in that the stop (s) is (are) designed as a shoulder or a notch. 5. A rail fastening device according to any one of claims 1 to 3, characterized in that the guide pin (1) is integrally formed with the washer (4a). 6. A rail fastening device according to any one of claims 1 to 3, characterized in that the guide pin (1) is embedded in the base (4). 7. A rail fastening device according to any one of claims 1 to 4, characterized in that the clamping piece (2) is made of spring steel having an average modulus of elasticity of 2.1 x ^{10 7} N / cm ² . 8. A rail fastening device according to any one of claims 1 to 3, characterized in that the flexible insert (3) between the rail sole (5a) and the bottom (4) or the washer (4a) is a polyethylene, rubber or notched rubber sheet.