Anti-loosening type turnout double-end special-shaped bolt

Abstract

The utility model relates to the field of railway turnout maintenance, in particular to an anti-loosening type turnout double-end special-shaped bolt which comprises a bolt body, threaded rods are arranged at the two ends of the bolt body, the outer end of each threaded rod is connected with a prism, nuts are connected to the threaded rods in a threaded mode, pin holes are formed in the prisms, and polygonal holes matched with the prisms are formed in one end of a sleeve cap. The inner wall of the sleeve cap is further provided with a polygonal inner wall used for limiting rotation of the nut and preventing looseness caused by vibration or other external force, the pin is installed in the pin hole in the prism, the sleeve cap is firmly fixed to the bolt body, and the sleeve cap is effectively prevented from being disengaged. The bolt is reasonable in structure and convenient to implement, synchronous rotation of the bolt body and the nuts at the two ends can be achieved, unscrewing and disengaging of the nuts are limited at the same time, the safety of equipment is improved, and the maintenance workload of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the field of railway turnout maintenance, in particular to an anti-loosening double-headed special-shaped bolt for turnouts. Background Art

[0002] In the switch structure of railway turnouts, double-headed special-shaped bolts (ball bolts) play a crucial role in positioning and fixing, ensuring that the turnout can be stably switched during train operation. The turnout consists of a switch rail base, a stock rail, and connecting parts, and needs to withstand frequent movements and limited switch machine conversion forces. Therefore, the stability and reliability of the bolts directly affect the normal operation of the turnout and train operation safety.

[0003] The tightening torque of double-headed special-shaped bolts faces many challenges during the use of turnouts. Due to the limitations of the turnout structure, the bolts cannot be tightened too much to avoid causing turnout jamming, nor can they be too loose to prevent potential train operation safety hazards.

[0004] Existing bolt connections are as shown on the right side in Figure 1 During train operation, the turnout generates vibrations, often causing the bolts to loosen and detach, and frequent adjustments are required. In addition, due to the difficulty of accurately achieving the fixed torque, it often causes coordination problems between track maintenance and signal maintenance, affecting the maintenance efficiency and safety of turnouts. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned technical defects and provide an anti-loosening double-headed special-shaped bolt for turnouts.

[0006] An anti-loosening double-headed special-shaped bolt for turnouts includes three parts: a bolt body, a sleeve cap, and a pin.

[0007] Both ends of the bolt body are threaded rods, and a prism is connected to the outer end of each threaded rod. A nut is screwed onto the threaded rod for fastening the connection structure. To ensure the stability of the structure, a pin hole is provided on the prism, and it can be fixed to other components through the pin. One end of the sleeve cap is provided with a polygonal hole that matches the prism to ensure that the sleeve cap can be firmly connected to the bolt body. The inner wall of the sleeve cap is also provided with a polygonal inner wall for restricting the rotation of the nut to prevent loosening caused by vibrations or other external forces. The sleeve cap is firmly fixed on the bolt body by being installed in the pin hole on the prism, effectively preventing it from detaching.

[0008] Furthermore, the prism is a hexagonal prism, and the polygonal hole is a hexagonal hole. This design ensures a tighter fit between the prism and the sleeve cap, improving the connection stability. At the same time, the structure of the hexagonal prism can provide a greater torque transmission capacity during rotation, increasing the firmness and reliability of the device.

[0009] Furthermore, there is a clearance fit between the polygonal inner wall of the sleeve cap and the outer edge of the hexagon nut, which facilitates the installation of the sleeve cap and ensures the fastening effect of the double-headed special-shaped bolt.

[0010] Furthermore, the length of the prism is 15 mm, and the distance between opposite sides of the hexagonal cross-section is 16 mm.

[0011] Furthermore, a relief notch is provided at the edge of one end of the sleeve cap close to the polygonal hole.

[0012] Advantages of the present utility model: The structure of the present utility model is reasonable and easy to implement. It can realize the synchronous rotation of the bolt body and the nuts at both ends, while restricting the loosening and detachment of the nuts, improving the safety of the equipment and reducing the workload of workers' maintenance. Description of the Drawings

[0013] Figure 1 is a comparison diagram of a double-headed special-shaped bolt with anti-loosening function for turnout of the present utility model and a traditional bolt.

[0014] Figure 2 is an axonometric view of a double-headed special-shaped bolt with anti-loosening function for turnout of the present utility model.

[0015] Figure 3 is an axonometric view of the sleeve cap of a double-headed special-shaped bolt with anti-loosening function for turnout of the present utility model.

[0016] As shown in the figure: 1. Bolt body; 11. Threaded rod; 12. Nut; 13. Prism; 14. Pin hole; 2. Sleeve cap; 21. Polygonal hole; 22. Polygonal inner wall; 23. Relief notch; 3. Pin. Specific Embodiment

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0018] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0019] In the description of the embodiments of the present utility model, if a feature is referred to as "arranged", "fixed", "connected", or "installed" on another feature, it can be directly arranged, fixed, connected, or installed on the other feature, or indirectly arranged, fixed, connected, or installed on the other feature.

[0020] In the description of the embodiments of the present utility model, if "several" is involved, it means more than one; if "a plurality of" is involved, it means more than two; if "greater than", "less than", or "exceeding" is involved, it should be understood as not including the present number; if "above", "below", or "within" is involved, it should be understood as including the present number. If "first" and "second" are involved, it should be understood as being used to distinguish technical features and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0021] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0022] A loosening-preventing double-headed special-shaped turnout bolt, including a bolt body 1, also known as a ball bolt. Both ends of the bolt body 1 are threaded rods 11, and nuts 12 are screwed on the threaded rods 11. The outer end of each threaded rod 11 is connected with a prism 13, and pin holes 14 are provided on the prisms 13 at both ends. A pin 4 is installed through the pin holes 14 to limit the detachment of the sleeve cap 2 and prevent loosening caused by vibration or other external forces during use. One end of the sleeve cap 2 is provided with a polygonal hole 21 that cooperates with the prism 13. The polygonal hole 21 is sleeved on the prism 13 to form a stable fit, ensuring that the nut does not rotate during use and effectively improving the loosening-preventing effect. The nut 12 is locked on the threaded rod 11, and the overall structure is simple and compact, easy to install, and suitable for the turnout system.

[0023] The prism 13 is a hexagonal prism, and the polygonal hole 21 is a hexagonal hole. Through the tight fit between the prism 13 and the polygonal hole 21, it can effectively avoid failures caused by the rotation or loosening of the bolt, enhance the stability, and ensure the safety and reliability of the turnout. In addition, the cooperation between the hexagonal prism and the hexagonal hole makes the loosening-preventing effect of the bolt more significant.

[0024] The polygonal inner wall 22 of the sleeve cap 2 and the outer edge of the hexagonal nut 12 are in clearance fit, which facilitates installation. This design ensures that the nut will not loosen easily when subjected to external forces and allows the tightening degree of the nut to be adjusted according to specific requirements, thus achieving a more flexible installation and usage method and further improving the application adaptability of the bolt.

[0025] A relief notch 23 is provided at the edge of one end of the sleeve cap 2 near the polygonal hole 21. When installing the ball plunger bolt on the track side, there will be a bolt member with an axis perpendicular to the ball plunger bolt beside it. The provision of the relief notch can provide an effective operating space for the installation and adjustment of the two types of bolts. The opening size of the relief notch 23 can be set according to the actual size.

[0026] Embodiment

[0027] The length of the prism 13 is 15 mm, the distance between opposite sides of the hexagonal cross-section is 16 mm, and it is provided with a pin hole. After the bolt body 1 is installed, the hexagonal nut 12 is screwed on. And after the bolt body 1 and the nut 12 are installed in place, the sleeve cap 2 is sleeved on the nut 12 and locked with a pin 3. The prism 13 in the shape of a hexagonal prism cooperates with the polygonal hole 21 in the shape of a hexagon, and the sleeve cap 2 does not rotate. The hexagonal nut 12 is restricted from rotating by the polygonal inner wall 22 on the inner wall of the sleeve cap 12, preventing the nut 12 from loosening and falling off;

[0028] During operation, the nut and the bolt body rotate simultaneously to ensure that the torque value remains unchanged, ensuring that the ball of the double-headed special-shaped bolt is fixed in the center of the web of the switch rail, preventing the conversion card set from being caused by the movement of the bolt, and effectively solving the problem of the switch rail becoming loose due to the ball plunger bolt. Ensuring the safety and stable operation of the train.

[0029] The application effect of the present utility model is as Figure 1 shown. On the left side of the figure is the application display of a loosening-proof double-headed special-shaped bolt for a switch rail of the present utility model, and on the right side of the figure is the application display of a traditional bolt.

[0030] Contents not described in detail in this specification belong to the well-known prior art in the art.

[0031] Through those skilled in the art, the bolt in this case is connected to its matching nut, and it should be installed on the switch rail according to the actual situation. The detailed connection means are well-known techniques in the art, and the installation method will not be described further.

[0032] The above description has been made on the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design without creativity a structural manner and an embodiment similar to the technical solution without departing from the gist of the creation of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A loosening-preventing double-headed special-shaped turnout bolt, characterized in that, Comprising: A bolt body (1), both ends of the bolt body (1) are threaded rods (11), nuts (12) are screwed on the threaded rods (11), a prism (13) is connected to the outer end of each threaded rod (11), and pin holes (14) are provided on the prisms (13) at both ends; A sleeve cap (2), one end of the sleeve cap (2) is provided with a polygonal hole (21) that cooperates with the prism (13), the polygonal hole (21) part of the sleeve cap (2) is sleeved on the prism (13), the sleeve cap (2) is sleeved on the threaded rod (11), and the inner wall of the sleeve cap (2) is provided with a polygonal inner wall (22) for restricting the rotation of the nut (12); A pin (3), the pin (3) is installed in the pin hole (14) on the prism (13) for restricting the detachment of the sleeve cap (2).

2. The anti-loosening double-headed special-shaped turnout bolt according to claim 1, characterized in that: The prism (13) is a hexagonal prism, and the polygonal hole (21) is a hexagonal hole.

3. The anti-loosening double-headed special-shaped turnout bolt according to claim 1, characterized in that: There is a clearance fit between the polygonal inner wall (22) of the sleeve cap (2) and the outer edge of the hexagonal nut (12), allowing fine adjustment of the nut (12) of the double-headed special-shaped bolt.

4. A loosening-preventing double-headed special-shaped turnout bolt according to claim 1, characterized in that: The length of the prism (13) is 15 mm, and the distance between the opposite sides of the hexagonal cross-section is 16 mm.

5. The anti-loosening type switch double-headed special-shaped bolt according to claim 1, wherein: A relief notch (23) is provided at the edge of one end of the sleeve cap (2) close to the polygonal hole (21).

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