RU135654U1 - RAIL BOND DOWEL (OPTIONS) - Google Patents

Abstract

1. Rail fastening dowel, made with an integral part and containing an external thread, an internal thread for connection with a fastening element, upper and lower sections, the last of which is made expanded with respect to the upper section and formed from the outside by a conical part, the continuation of which is a cylindrical part characterized in that the dowel is made of polyamide, while the external and internal threads are multidirectional. 2. The rail fastening dowel according to claim 1, characterized in that it is made of polyamide 66.3. The rail fastening dowel according to claim 1, characterized in that the external thread is left-handed and the internal thread is right-handed. The rail fastening dowel according to claim 1, characterized in that the conical part of the expanded lower section is bounded by an angle α, the value of which is 80 ÷ 100 °. 5. The dowel rail fastening according to claim 1, characterized in that the external thread is made trapezoidal. The rail fastening dowel according to claim 1 or 3, characterized in that the pitch of the internal thread exceeds the pitch of the external thread. 7. Rail fastening dowel, made with an integral part and containing external thread, internal thread for connection with the fastener, upper and lower sections, the last of which is expanded with respect to the upper section and is formed from the outside by a conical part, the continuation of which is a cylindrical part, characterized the fact that the dowel is made of polyamide, while the external and internal threads are made multidirectional, and the lower section is provided with a recess bounded by three side faces and, the height of each

Description

Technical field

A utility model relates to an element of a fastening assembly of a rail fastening intended for installation in a sleeper, made primarily of wood or modified wood.

State of the art

A threaded dowel is known from the prior art (see analogue - Eurasian patent No. 016150, publ. 2012.02.28, IPC ЕВВ 9/18, F16В 13/02), made as a single piece and containing an external thread, an internal thread for connection with a fastener, two opposite peripheral sections, in the upper of which a fastener is introduced when assembling the rail fastener. The upper peripheral portion is smoothly expanded with respect to the lower peripheral portion, and the internal thread has a smaller pitch than the external thread. A screw or an anchor bolt may be used as a fastener.

The disadvantages of this dowel include its lack of reliability in rail fastening, since under the action of loads, the fastening element together with the dowel can exit the sleepers.

The threaded dowel is known from the prior art (see the closest analogue - patent RU No. 117448, publ. 06/27/2012, IPC ЕВВ 9/38, figure 6), made with an integral part and containing an external thread, an internal thread for connection with a fastener. The dowel contains opposite upper and lower sections, the last of which is made expanded with respect to the said upper section and is formed from the outside by a conical section, the continuation of which is a cylindrical section. The above construction preserves the position of the dowel in the body of the sleepers with repeated screwing in and out of the fastener. However, when performing external and internal threads unidirectional, for example, right-handed or left-handed, with repeated screwing in or out of the fastener, there is a possibility of weakening the position of the dowel in the body of the sleepers, which reduces the reliability of rail fastening.

Utility Model Disclosure

The objective of the utility model is aimed at creating a durable and reliable dowel mounted on the underside of the sleepers and retaining its position in the body of the sleepers with repeated screwing in and out of the fastener.

The technical result that can be obtained from the use of the claimed utility model is to increase the operational reliability of the dowel in rail fastening.

To achieve a technical result, according to the first embodiment, the rail fastening dowel is made as a whole part and contains an external thread, an internal thread for connection with a fastening element, upper and lower sections, the last of which is made expanded with respect to the upper section and is formed from the outside by a conical part , the continuation of which is the cylindrical part, the dowel made of polyamide, while the external and internal threads are made in different directions.

The dowel can be made of polyamide 66.

The external thread of the dowel is made left-handed, and the internal thread is made right-handed.

The conical part of the expanded lower portion of the dowel is bounded by an angle α, the magnitude of which is 80–100 °.

The external thread of the dowel can be made trapezoidal.

The pitch of the internal thread may exceed the pitch of the external thread of the dowel.

To achieve a technical result, according to the second embodiment, the rail fastening dowel is made as a single piece and contains an external thread, an internal thread for connection with a fastener, upper and lower sections, the last of which is made expanded with respect to the upper section and is formed on the outside by a conical part , the continuation of which is a cylindrical part, the dowel made of polyamide, while the external and internal threads are made multidirectional, and the lower section is provided with deepening limited by three lateral faces, the height of each of which is 8 ÷ 15 mm.

The height of each side face corresponds to the height of the cylindrical part of the lower section.

The dowel can be made of polyamide 66.

The external thread of the dowel is made left-handed, and the internal thread is made right-handed.

The conical part of the expanded lower portion of the dowel is bounded by an angle α, the magnitude of which is 80–100 °.

The external thread of the dowel can be made trapezoidal.

The pitch of the internal thread may exceed the pitch of the external thread of the dowel.

The set of features of the claimed utility model is in a causal relationship with the achieved technical result and is presented in the independent claims of the utility model.

Brief Description of Explanatory Figures

FIG. 1 - schematically shows the proposed dowel;

FIG. 2 is a view A in FIG. one;

FIG. 3 is a section BB of FIG. 2;

FIG. 4 - schematically shows the rail fastening with the proposed dowel.

The figures show:

1 - dowel;

2 - external thread;

3 - internal thread;

4 - upper section;

5 - lower section;

5a - conical part;

5b is a cylindrical part;

6 - sleepers;

7 - fastener;

7a is a threaded portion of a fastener;

7b — head of the fastener;

8 - hole;

9 - under-rail lining;

10 - deepening;

11 - side faces;

12 - spring terminal;

13 - rail.

It should be understood that specialists in the art will be able to offer other options for implementing the utility model and that some of its details can be changed in various other aspects, without going beyond the essence and scope of the present utility model. Accordingly, the explanatory figures and the detailed description of the rail anchor are illustrative, but not restrictive.

The best option for implementing a utility model

The dowel 1 of the rail fastening is made of an integral part and contains: multidirectional external thread 2 and internal thread 3, one of which is made right-handed and the other is left-handed; the upper 4 and lower 5 sections, the last of which is made expanded in relation to said upper section 4.

Preferably, the external thread 2 is trapezoidal, which increases the reliability of holding the dowel 1 in the body of the sleepers 6. The internal thread 3 is designed to connect the dowel 1 with the fastener 7, which is inserted into the hole 8 of the dowel 1 through the upper section 4 during the assembly of the rail fastening The performance of the external 2 and internal 3 threads in opposite directions increases the operational reliability of the dowel 1 in the rail fastening, since during the screwing of the fastening element 7 into the dowel 1, the latter (meaning the dowel l 1) is pulled up to the lining under-rail 9, thus unscrewing the dowel 1 is eliminated from the body 6 sleepers during repeated screwing and unscrewing of the fastening member 7. In a specific exemplary embodiment, the external thread 2 is left-handed, and the internal thread 3 is right-handed; the pitch of the internal thread 3 exceeds the pitch of the external thread 2.

As the fastening element 7 can be used a bolt, screw, or screw.

On the outside of the dowel 1, the lower portion 5 is formed by a conical part 5 a, the continuation of which is the cylindrical part 5b. A turnkey recess 10 is made in the cylindrical part 5b, by means of which the dowel 1 is screwed into the hole of the sleepers 6. Said recess 10 is bounded by three side faces 11, while the height h1 of each of the side faces 11 corresponds to the height h2 of the cylindrical part 5b, i.e. h1 = h2, while minor technological deviations of the heights h1 and h2 that occur during the manufacturing of the dowel 1 are allowed. In a specific embodiment, the height h2 of the cylindrical part 5b and the height hi of each of the side faces 11 are from 8 to 15 mm. This design of the lower section 5 can withstand increased loads acting on the side faces 11 and, accordingly, the lower section 5 in the process of tightening the dowel 1 in the body of the sleepers 6, and virtually eliminates the separation of the lower section 5 and / or the appearance of cracks in it. The above implementation of the lower section 5 allows the dowel 1 to maintain its position in the sleeper 6 with repeated screwing in and out of the fastening element 7 and eliminates the spontaneous exit of the dowel 1 from the body of the sleepers 6.

In a specific embodiment, the conical part 5a of the lower portion 5 is bounded by an angle α, the magnitude of which is 80 ÷ 100 °.

The dowel 1 can be made by injection molding. For the manufacture of dowel 1, it is advisable to use high-strength polymer material polyamide 66, which retains its properties in the temperature range from -50 to + 80 ° C, which, in turn, allows the dowel 1 to retain its structurally set shape and performance in the rail fastening assembly. In a specific embodiment, polyamide grade PA66-GF50 is used.

The dowel 1 described above is used in rail fastening with wooden sleepers 6. Sleepers 6 can also be made of modified wood, which can increase the service life of rail fasteners.

To the rail fastener design, the dowel 1 is installed from below into the sleepers 6 body, while the lower section 5 with the recess 10 is located in the lower part of the sleepers 6. In the process of assembling the rail fasteners, the fastening element 7 is installed from above, and a through hole passes through the rail lining 9 and enters the hole 8 of the dowel 1 through the upper section 4. In the process of screwing the fastening element 7, its threaded section 7a interacts with the internal thread 3, thereby pulling the dowel 1 up, while the head 7b of the fastening element 7 and the expanded lower section 5 of the dowel 1 are located on opposite sides of the rail fastening, thus creating a reliable connection.

In a preassembled rail fastener, said fastener 7 presses the spring terminal 12 against the rail rail 9, which is fixedly fastened to the rail 6, while the spring terminal 12 presses the rail 13 to the rail rail 9 and, accordingly, to the rail 6.

Claims (13)

1. Rail fastening dowel, made with an integral part and containing an external thread, an internal thread for connection with a fastening element, upper and lower sections, the last of which is made expanded with respect to the upper section and formed from the outside by a conical part, the continuation of which is a cylindrical part characterized in that the dowel is made of polyamide, while the external and internal threads are made multidirectional. 2. The dowel rail fastening according to claim 1, characterized in that it is made of polyamide 66. 3. The rail fastening dowel according to claim 1, characterized in that the external thread is made left-handed and the internal thread is made right-handed. 4. The dowel rail fastening according to claim 1, characterized in that the conical part of the expanded lower section is limited by an angle α, the value of which is 80 ÷ 100 °. 5. The dowel rail fastening according to claim 1, characterized in that the external thread is made trapezoidal. 6. The dowel rail fastening according to claim 1 or 3, characterized in that the pitch of the internal thread exceeds the pitch of the external thread. 7. Rail fastening dowel made with a single piece and containing external thread, internal thread for connection with the fastener, upper and lower sections, the last of which is made expanded with respect to the upper section and formed from the outside by a conical part, the continuation of which is the cylindrical part characterized in that the dowel is made of polyamide, while the external and internal threads are multidirectional, and the lower section is provided with a recess bounded by three side edges E, the height of each of which is 8 ÷ 15 mm. 8. The dowel rail fastening according to claim 7, characterized in that it is made of polyamide 66. 9. The rail fastening dowel according to claim 7, characterized in that the external thread is made left-handed and the internal thread is made right-handed. 10. The dowel rail fastening according to claim 7, characterized in that the conical part of the expanded lower section is limited by an angle α, the value of which is 80 ÷ 100 °. 11. The dowel rail fastening according to claim 7, characterized in that the external thread is made trapezoidal. 12. The dowel rail fastening according to claim 7, characterized in that the height of each side face corresponds to the height of the cylindrical part of the lower section. 13. The dowel rail fastening according to claim 7 or 9, characterized in that the pitch of the internal thread exceeds the pitch of the external thread.

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