RU218861U1 - Sleeve intermediate rail fastening - Google Patents

Abstract

The utility model relates to the structure of the upper structure of the railway track, in particular to the design of the sleeve used as part of the intermediate rail fastening and designed to be placed in the mounting hole of the rail fastening element when it is installed on a track screw with a washer for attaching to a sleeper. The technical result of this utility model is to increase the operational reliability of the sleeve and the intermediate rail fastening, as well as to expand the arsenal of technical means. The technical result is achieved by using an intermediate rail fastening sleeve containing a cylindrical base with a central hole for accommodating the fastener and a cap made in the upper part of the cylindrical base with a diameter greater than the diameter of the cylindrical base, while on the outer wall of the cylindrical base there are annular protrusions located along the entire height of the cylindrical base of the sleeve at a distance from each other. 3 w.p. f-ly, 3 ill.

Description

Technical field

The utility model relates to the structure of the upper structure of the railway track, in particular to the design of the sleeve used as part of the intermediate rail fastening and designed to be placed in the mounting holes of the rail fastening elements when installing track screws in them for attaching to the sleeper.

State of the art

From the prior art, a rail fastening sleeve is known (RF patent No. 2767112, published on March 16, 2022), containing a cylindrical base with a central hole for accommodating the fastener and a cap made in the upper part of the cylindrical base with a diameter exceeding the diameter of the cylindrical base.

Such a sleeve is pre-mounted on a fastener (travel screw) with a washer. The sleeve performs the function of a washer retainer, a centralizer, by means of which the longitudinal axis of the track screw and the longitudinal axis of the dowel are aligned in the process of connecting the rail fastener with the sleeper and provides a protective function against ingress of weeds into the dowel channel and the mounting hole.

In this case, the outer wall of the cylindrical base of the sleeve is made even. When the bushing is installed in the mounting hole of the rail fastening element, a gap is formed between the walls of the mounting hole and the bushing, which leads to the fact that during the operation of the fastening unit, weeds enter the dowel channel and into the mounting hole during the movement of the rolling stock, and a large amount of moisture accumulates, which contributes to reducing the reliability of rail fastening.

Known sleeve rail fastening (China patent No. 107700285, published 02/16/2018), adopted as the closest analogue to the claimed solution, containing a cylindrical base with a central hole for accommodating the fastener and a cap made in the upper part of the cylindrical base with a diameter exceeding the diameter of the cylindrical base, while on the outer wall of the cylindrical base in its lower part there are annular protrusions.

The presence of such annular protrusions on the outer wall of the cylindrical base of the sleeve makes it possible to fill the gap between the adjacent walls of the base of the sleeve and the dowel hole and to achieve a tighter fit to each other.

However, such annular protrusions are made only in the lower part of the cylindrical base of the sleeve, which is insufficient to ensure the reliability of the rail fastening. At the same time, the upper part of the cylindrical base of the sleeve also remains made with even walls, which leads to the formation of large gaps between the walls of the sleeve and the walls of the mounting hole.

The technical problem of the claimed utility model is to overcome the technical shortcomings inherent in analogues, which leads to the need to create an intermediate rail fastening sleeve, which increases the service life of the rail fastening.

Disclosure of the essence of the utility model

The technical result of this utility model is to increase the operational reliability of the sleeve and the intermediate rail fastening due to the design features of the solution, as well as to expand the arsenal of technical means.

The technical result is achieved by using an intermediate rail fastening sleeve containing a cylindrical base with a central hole for accommodating the fastener and a cap made in the upper part of the cylindrical base with a diameter exceeding the diameter of the cylindrical base, while on the outer wall of the cylindrical base there are annular protrusions located along the entire height of the cylindrical base of the sleeve at a distance from each other.

When the rolling stock moves, the elements of the intermediate rail fastening are subjected to alternating loads in the vertical and horizontal planes. Such loads are largely transferred from the rail fastening element (for example, a metal lining or side stop) to the track screw that fixes it. Therefore, the use of the claimed bushings as part of the fastening makes it possible to dampen such dynamic loads, which increases the reliability of the intermediate rail fastening.

In addition, the claimed design of the sleeve, which acts as an element that prevents the ingress of weeds and moisture into the dowel and mounting holes, increases the operational reliability of both the sleeve and the intermediate rail fastening as a whole.

In a particular case, the sleeve is made of rubber or polymer.

In a particular case, the height of the annular protrusion in the lower part of the cylindrical base of the sleeve is made greater than the height of the remaining annular protrusions located along the height of the cylindrical base of the sleeve.

In a particular case, the head of the sleeve in the upper part of the cylindrical base of the sleeve is associated with an annular protrusion.

The location of the annular protrusions along the entire height of the cylindrical base of the bushing allows to obtain a tight and at the same time more evenly distributed contact between the outer walls of the bushing and the walls of the mounting hole of the rail fastening element over the entire height, which ensures that the travel screw is centered in the dowel hole during the entire life of the rail fastening .

Making the bushing from rubber or similar elastic polymeric material allows it to bend elastically and additionally fill the micro-gaps between the outer walls of the bushing and the walls of the mounting hole to obtain a tighter contact.

At the same time, the total area of the outer surface of the bushing walls, which perceives dynamic loads, increases, which contributes to their additional repayment and a decrease in the destructive effect on track screws and other rail fastening parts, which ensures an increase in the operational reliability of the bushing and intermediate rail fastening, as well as expanding the arsenal of technical means.

A more hermetic placement of the sleeve in the mounting hole eliminates the ingress of weeds and moisture into hard-to-reach places in the mounting and dowel holes, which also increases the resource of both individual parts and the rail fastening as a whole.

At the same time, the height of the annular protrusion from the lower part of the cylindrical base of the sleeve is greater than the height of the remaining annular protrusions distributed along the height of the cylindrical base of the sleeve, gives the lower part of the sleeve rigidity to ensure its greater stability and hold the shape when the sleeve is installed in the mounting hole when mounting the rail fastening , as well as under the influence of vertical dynamic loads.

The coupling of the sleeve head in the upper part of the cylindrical base with the annular protrusion will also stiffen the sleeve structure when it is installed in the mounting hole and when exposed to loads, and also provides a gradual stepped transition between the head and the sleeve base for even distribution of such loads.

Brief description of the drawings

In FIG. 1 shows a front view of the bushing.

In FIG. 2 shows a section of an intermediate rail fastening, which includes the inventive sleeve and a screw (the dowel is not shown).

In FIG. 3 shows a section of an intermediate rail fastening, which includes the inventive bushing, screw and dowel.

Positions in the drawings indicate the following elements:

1 - bushing;

2 - cylindrical base;

3 - bushing cap;

4 - annular protrusions;

5 - sleeper;

6 - dowel;

7 - travel screw;

8 - washer of the track screw;

9 - spring on the fastener;

10 - elastic gasket;

11 - elastic gasket;

12 - lining;

13 - rail pad;

14 - rail;

15 - spring bar terminal;

16 - terminal bolt;

17 - washer of the terminal bolt;

18 - terminal bolt nut.

The sleeve 1 contains a cylindrical base 2, in the upper part of which there is a cap 3, the diameter of which is greater than the diameter of the base 2 of the sleeve 1.

On the outer wall of the cylindrical base 2, annular projections 4 are made, located along the entire height A of the sleeve 1 at a distance from each other.

The height B of the annular protrusion 4 in the lower part of the cylindrical base 2 of the sleeve 1 is made greater than the height C of the other annular protrusions 4.

Hat 3 can be associated with an annular protrusion 4, also located in the upper part of the cylindrical base 2 of the sleeve 1.

Implementation of the utility model

Bushing 1 is made as a single piece of rubber or polymer.

A dowel 6 is installed in the body of the sleeper 5. The bushing 1 is put on the track screw 7 with the washer 8 and the spring 9. Next, elastic pads 10, 11, lining 12 are installed on the sleeper 5, which are attached to the sleeper 5 by means of the track screws 7.

On the under-rail zone of the lining 12, located between its flanges, the under-rail pad 13 is installed and the rail 14 is laid.

The rail 14 is fixed with the help of 12 spring bar terminals 15 installed in the flange of the lining, which, in turn, are fixed on the lining 12 with the help of a terminal bolt 16, a washer 17 and a nut 18.

The inventive bushing 1 can significantly reduce the vibration of track screws 7 and the wear of sleepers 5, which ensures high reliability in operation, increases the overhaul life of all components of the rail fastening and reduces the risk of an emergency.

Depending on the type and composition of the elements of the intermediate rail fastening, on their height and on the height of the bushing, the claimed bushing can either adjoin the top part of the dowel or be at a distance from it.

Example

Sleeve 1 is used as part of the ZhBR-65PSHT rail fastening. Made from rubber compound 57-7628 or other materials with physical and mechanical properties not lower than those of this material.

The height A of the sleeve 1 is made equal to 18 mm.

The height B of the annular protrusion 4 in the lower part of the cylindrical base 2 is made equal to 2 mm.

Height With annular protrusions 4 is made equal to 1 mm.

The width D of the cap 3 of the sleeve 1 is made equal to 32 mm.

The width Ε of the cylindrical base of the sleeve 1 is made equal to 26 mm.

The width F of the annular protrusion 4 in the lower part of the cylindrical base is made equal to 28 mm.

The width G between the inner walls of the cylindrical base 2 is made equal to 24 mm.

The sleeve 1 contains 5 annular protrusions 4 located along its entire height A. In this case, the first annular protrusion located in the upper part of the cylindrical base 2 of the sleeve 1 is associated with its cap 3, and the height Η of the cap 3 together with the first annular protrusion is 2 mm .

The distance I from said first annular protrusion to the second annular protrusion is 2.5 mm. The distance J between the second and third annular projections, as well as between the third and fourth annular projections, is 3 mm. The distance K between the fourth and fifth annular protrusion located in the lower part of the cylindrical base 2 is made equal to 2.5 mm.

Thus, the use of the inventive sleeve, put on the fastener (track screw) and placed in the mounting hole of the rail fastening element, which, depending on the type of fastening, can be, for example, a rail underlay or a side polymer stop, eliminates the risk of premature wear of the part screws, which increases the overhaul interval during the operation of rail fastening and significantly saves labor and financial resources.

Claims (4)

1. Sleeve intermediate rail fastening containing a cylindrical base with a Central hole to accommodate the fastener and a hat made in the upper part of the cylindrical base with a diameter greater than the diameter of the cylindrical base, characterized in that the outer wall of the cylindrical base is made of annular protrusions located throughout the height of the cylindrical base of the sleeve at a distance from each other. 2. Sleeve according to claim 1, characterized in that it is made of a polymer. 3. The sleeve according to claim 1, characterized in that the height of the annular protrusion in the lower part of the cylindrical base of the sleeve is made greater than the height of the remaining annular protrusions located along the height of the cylindrical base of the sleeve. 4. Bushing according to claim. 1, characterized in that the cap of the bushing in the upper part of the cylindrical base of the bushing is associated with an annular protrusion.

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